/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied. 
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 * 
 * Author							Change						Date
 * ******************************************************************************
 * Jan Källman		    Initial Release		        2010-01-28
 * Jan Källman		    License changed GPL-->LGPL  2011-12-27
 * Eyal Seagull		    Conditional Formatting      2012-04-03
 *******************************************************************************/
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using OfficeOpenXml.Style;
using System.Xml;
using System.Drawing;
using System.Globalization;
using System.Collections;
using OfficeOpenXml.Table;
using System.Text.RegularExpressions;
using System.IO;
using System.Linq;
using OfficeOpenXml.DataValidation;
using OfficeOpenXml.DataValidation.Contracts;
using System.Reflection;
using OfficeOpenXml.Style.XmlAccess;
using System.Security;
using OfficeOpenXml.ConditionalFormatting;
using OfficeOpenXml.ConditionalFormatting.Contracts;

namespace OfficeOpenXml
{
	/// <summary>
	/// A range of cells 
	/// </summary>
	public class ExcelRangeBase : ExcelAddress, IExcelCell, IDisposable, IEnumerable<ExcelRangeBase>, IEnumerator<ExcelRangeBase>
	{
		/// <summary>
		/// Reference to the worksheet
		/// </summary>
		protected ExcelWorksheet _worksheet;
		private ExcelWorkbook _workbook = null;
		private delegate void _changeProp(_setValue method, object value);
		private delegate void _setValue(object value, int row, int col);
		private _changeProp _changePropMethod;
		private int _styleID;
		#region Constructors
		internal ExcelRangeBase(ExcelWorksheet xlWorksheet)
		{
			_worksheet = xlWorksheet;
			_ws = _worksheet.Name;
            this.AddressChange += new EventHandler(ExcelRangeBase_AddressChange);
			SetDelegate();
		}

        void ExcelRangeBase_AddressChange(object sender, EventArgs e)
        {
            SetDelegate();
        }
		internal ExcelRangeBase(ExcelWorksheet xlWorksheet, string address) :
			base(xlWorksheet == null ? "" : xlWorksheet.Name, address)
		{
			_worksheet = xlWorksheet;
			if (string.IsNullOrEmpty(_ws)) _ws = _worksheet == null ? "" : _worksheet.Name;
            this.AddressChange += new EventHandler(ExcelRangeBase_AddressChange);
            SetDelegate();
		}
		internal ExcelRangeBase(ExcelWorkbook wb, ExcelWorksheet xlWorksheet, string address, bool isName) :
			base(xlWorksheet == null ? "" : xlWorksheet.Name, address, isName)
		{
			_worksheet = xlWorksheet;
			_workbook = wb;
			if (string.IsNullOrEmpty(_ws)) _ws = (xlWorksheet == null ? null : xlWorksheet.Name);
            this.AddressChange += new EventHandler(ExcelRangeBase_AddressChange);
            SetDelegate();
		}
        ~ExcelRangeBase()
        {
            this.AddressChange -= new EventHandler(ExcelRangeBase_AddressChange);
        }
		#endregion
		#region Set Value Delegates		
        private void SetDelegate()
		{
			if (_fromRow == -1)
			{
				_changePropMethod = SetUnknown;
			}
			//Single cell
			else if (_fromRow == _toRow && _fromCol == _toCol && Addresses == null)
			{
				_changePropMethod = SetSingle;
			}
			//Range (ex A1:A2)
			else if (Addresses == null)
			{
				_changePropMethod = SetRange;
			}
			//Multi Range (ex A1:A2,C1:C2)
			else
			{
				_changePropMethod = SetMultiRange;
			}
		}
        /// <summary>
		/// We dont know the address yet. Set the delegate first time a property is set.
		/// </summary>
		/// <param name="valueMethod"></param>
		/// <param name="value"></param>
		private void SetUnknown(_setValue valueMethod, object value)
		{
			//Address is not set use, selected range
			if (_fromRow == -1)
			{
				SetToSelectedRange();
			}
			SetDelegate();
			_changePropMethod(valueMethod, value);
		}
		/// <summary>
		/// Set a single cell
		/// </summary>
		/// <param name="valueMethod"></param>
		/// <param name="value"></param>
		private void SetSingle(_setValue valueMethod, object value)
		{
			valueMethod(value, _fromRow, _fromCol);
		}
		/// <summary>
		/// Set a range
		/// </summary>
		/// <param name="valueMethod"></param>
		/// <param name="value"></param>
		private void SetRange(_setValue valueMethod, object value)
		{
			SetValueAddress(this, valueMethod, value);
		}
		/// <summary>
		/// Set a multirange (A1:A2,C1:C2)
		/// </summary>
		/// <param name="valueMethod"></param>
		/// <param name="value"></param>
		private void SetMultiRange(_setValue valueMethod, object value)
		{
			SetValueAddress(this, valueMethod, value);
			foreach (var address in Addresses)
			{
				SetValueAddress(address, valueMethod, value);
			}
		}
		/// <summary>
		/// Set the property for an address
		/// </summary>
		/// <param name="address"></param>
		/// <param name="valueMethod"></param>
		/// <param name="value"></param>
		private void SetValueAddress(ExcelAddress address, _setValue valueMethod, object value)
		{
			IsRangeValid("");
			if (_fromRow == 1 && _fromCol == 1 && _toRow == ExcelPackage.MaxRows && _toCol == ExcelPackage.MaxColumns)  //Full sheet (ex ws.Cells.Value=0). Set value for A1 only to avoid hanging 
			{
				throw (new ArgumentException("Can't reference all cells. Please use the indexer to set the range"));
			}
			else
			{
				for (int col = address.Start.Column; col <= address.End.Column; col++)
				{
					for (int row = address.Start.Row; row <= address.End.Row; row++)
					{
						valueMethod(value, row, col);
					}
				}
			}
		}
		#endregion
		#region Set property methods
		private void Set_StyleID(object value, int row, int col)
		{
			_worksheet.Cell(row, col).StyleID = (int)value;
		}
		private void Set_StyleName(object value, int row, int col)
		{
			_worksheet.Cell(row, col).SetNewStyleName(value.ToString(), _styleID);
		}
		private void Set_Value(object value, int row, int col)
		{
			ExcelCell c = _worksheet.Cell(row, col);
			if (c._sharedFormulaID > 0) SplitFormulas();
			_worksheet.Cell(row, col).Value = value;
		}
		private void Set_Formula(object value, int row, int col)
		{
			ExcelCell c = _worksheet.Cell(row, col);
			if (c._sharedFormulaID > 0) SplitFormulas();

			string formula = (value == null ? string.Empty : value.ToString());
			if (formula == string.Empty)
			{
				c.Formula = string.Empty;
			}
			else
			{
				if (formula[0] == '=') value = formula.Substring(1, formula.Length - 1); // remove any starting equalsign.
				c.Formula = formula;
			}
		}
		/// <summary>
		/// Handles shared formulas
		/// </summary>
		/// <param name="value">The  formula</param>
		/// <param name="address">The address of the formula</param>
		/// <param name="IsArray">If the forumla is an array formula.</param>
		private void Set_SharedFormula(string value, ExcelAddress address, bool IsArray)
		{
			if (_fromRow == 1 && _fromCol == 1 && _toRow == ExcelPackage.MaxRows && _toCol == ExcelPackage.MaxColumns)  //Full sheet (ex ws.Cells.Value=0). Set value for A1 only to avoid hanging 
			{
				throw (new InvalidOperationException("Can't set a formula for the entire worksheet"));
			}
			else if (address.Start.Row == address.End.Row && address.Start.Column == address.End.Column && !IsArray)             //is it really a shared formula? Arrayformulas can be one cell only
			{
				//Nope, single cell. Set the formula
				Set_Formula(value, address.Start.Row, address.Start.Column);
				return;
			}
			//RemoveFormuls(address);
			CheckAndSplitSharedFormula();
			ExcelWorksheet.Formulas f = new ExcelWorksheet.Formulas();
			f.Formula = value;
			f.Index = _worksheet.GetMaxShareFunctionIndex(IsArray);
			f.Address = address.FirstAddress;
			f.StartCol = address.Start.Column;
			f.StartRow = address.Start.Row;
			f.IsArray = IsArray;

			_worksheet._sharedFormulas.Add(f.Index, f);
			_worksheet.Cell(address.Start.Row, address.Start.Column).SharedFormulaID = f.Index;
			_worksheet.Cell(address.Start.Row, address.Start.Column).Formula = value;

			for (int col = address.Start.Column; col <= address.End.Column; col++)
			{
				for (int row = address.Start.Row; row <= address.End.Row; row++)
				{
					_worksheet.Cell(row, col).SharedFormulaID = f.Index;
				}
			}
		}
		private void Set_HyperLink(object value, int row, int col)
		{
			_worksheet.Cell(row, col).Hyperlink = value as Uri;
		}
		private void Set_IsRichText(object value, int row, int col)
		{
			_worksheet.Cell(row, col).IsRichText = (bool)value;
		}
		private void Exists_Comment(object value, int row, int col)
		{
			ulong cellID = GetCellID(_worksheet.SheetID, row, col);
			if (_worksheet.Comments._comments.ContainsKey(cellID))
			{
				throw (new InvalidOperationException(string.Format("Cell {0} already contain a comment.", new ExcelCellAddress(row, col).Address)));
			}

		}
		private void Set_Comment(object value, int row, int col)
		{
			string[] v = (string[])value;
			Worksheet.Comments.Add(new ExcelRangeBase(_worksheet, GetAddress(_fromRow, _fromCol)), v[0], v[1]);
			//   _worksheet.Cell(row, col).Comment = comment;
		}
		#endregion
		private void SetToSelectedRange()
		{
			if (_worksheet.View.SelectedRange == "")
			{
				Address = "A1";
			}
			else
			{
				Address = _worksheet.View.SelectedRange;
			}
		}
		private void IsRangeValid(string type)
		{
			if (_fromRow <= 0)
			{
				if (_address == "")
				{
					SetToSelectedRange();
				}
				else
				{
					if (type == "")
					{
						throw (new InvalidOperationException(string.Format("Range is not valid for this operation: {0}", _address)));
					}
					else
					{
						throw (new InvalidOperationException(string.Format("Range is not valid for {0} : {1}", type, _address)));
					}
				}
			}
		}
		#region Public Properties
		/// <summary>
		/// The styleobject for the range.
		/// </summary>
		public ExcelStyle Style
		{
			get
			{
				IsRangeValid("styling");
				return _worksheet.Workbook.Styles.GetStyleObject(_worksheet.Cell(_fromRow, _fromCol).StyleID, _worksheet.PositionID, Address);
			}
		}
		/// <summary>
		/// The named style
		/// </summary>
		public string StyleName
		{
			get
			{
				IsRangeValid("styling");
				return _worksheet.Cell(_fromRow, _fromCol).StyleName;
			}
			set
			{
				_styleID = _worksheet.Workbook.Styles.GetStyleIdFromName(value);
				if (_fromRow == 1 && _toRow == ExcelPackage.MaxRows)    //Full column
				{
					ExcelColumn column;
					//Get the startcolumn
					ulong colID = ExcelColumn.GetColumnID(_worksheet.SheetID, _fromCol);
					if (!_worksheet._columns.ContainsKey(colID))
					{
						column = _worksheet.Column(_fromCol);
					}
					else
					{
						column = _worksheet._columns[colID] as ExcelColumn;
					}

					var index = _worksheet._columns.IndexOf(colID);
					while (column.ColumnMin <= _toCol)
					{
						if (column.ColumnMax > _toCol)
						{
                            var newCol = _worksheet.CopyColumn(column, _toCol + 1, column.ColumnMax);
							column.ColumnMax = _toCol;
						}

						column._styleName = value;
						column._styleID = _styleID;

						index++;
						if (index >= _worksheet._columns.Count)
						{
							break;
						}
						else
						{
							column = (_worksheet._columns[index] as ExcelColumn);
						}
					}

					if (column._columnMax < _toCol)
					{
						var newCol = _worksheet.Column(column._columnMax + 1) as ExcelColumn;
						newCol._columnMax = _toCol;

						newCol._styleID = _styleID;
						newCol._styleName = value;
					}
                    if (_fromCol == 1 && _toCol == ExcelPackage.MaxColumns) //FullRow
                    {
                        foreach(ExcelRow row in _worksheet._rows)
                        {
                            row._styleName = value;
                            row._styleId = _styleID;
                        }
                    }
				}
                else if (_fromCol == 1 && _toCol == ExcelPackage.MaxColumns) //FullRow
                {
                    for (int row = _fromRow; row <= _toRow; row++)
                    {
                        _worksheet.Row(row)._styleName = value;
                        _worksheet.Row(row)._styleId = _styleID;
                    }
                }

                if (!((_fromRow == 1 && _toRow == ExcelPackage.MaxRows) || (_fromCol == 1 && _toCol == ExcelPackage.MaxColumns))) //Cell specific
                {
                    for (int col = _fromCol; col <= _toCol; col++)
                    {
                        for (int row = _fromRow; row <= _toRow; row++)
                        {
                            _worksheet.Cell(row, col).StyleName = value;
                        }
                    }
                }
                else //Only set name on created cells. (uncreated cells is set on full row or full column).
                {
                    int tempIndex = _index;
                    var e = this as IEnumerator;
                    e.Reset();
                    while (e.MoveNext())
                    {
                        ((ExcelCell)_worksheet._cells[_index]).SetNewStyleName(value, _styleID);
                    }
                    _index = tempIndex;
                }
                //_changePropMethod(Set_StyleName, value);
			}
		}
		/// <summary>
		/// The style ID. 
		/// It is not recomended to use this one. Use Named styles as an alternative.
		/// If you do, make sure that you use the Style.UpdateXml() method to update any new styles added to the workbook.
		/// </summary>
		public int StyleID
		{
			get
			{
				return _worksheet.Cell(_fromRow, _fromCol).StyleID;
			}
			set
			{
				_changePropMethod(Set_StyleID, value);
			}
		}
		/// <summary>
		/// Set the range to a specific value
		/// </summary>
		public object Value
		{
			get
			{
				if (IsName)
				{
					if (_worksheet == null)
					{
						return _workbook._names[_address].NameValue;
					}
					else
					{
						return _worksheet.Names[_address].NameValue; ;
					}
				}
				else
				{
					if (_fromRow == _toRow && _fromCol == _toCol)
					{
						return _worksheet.GetValue(_fromRow, _fromCol);
					}
					else
					{
						return GetValueArray();
					}
				}
			}
			set
			{
				if (IsName)
				{
					if (_worksheet == null)
					{
						_workbook._names[_address].NameValue = value;
					}
					else
					{
						_worksheet.Names[_address].NameValue = value;
					}
				}
				else
				{
					_changePropMethod(Set_Value, value);
				}
			}
		}

        private bool IsInfinityValue(object value)
        {
            double? valueAsDouble = value as double?;

            if(valueAsDouble.HasValue && 
                (double.IsNegativeInfinity(valueAsDouble.Value) || double.IsPositiveInfinity(valueAsDouble.Value)))
            {
                return true;
            }

            return false;
        }

		private object GetValueArray()
		{
			ExcelAddressBase addr;
			if (_fromRow == 1 && _fromCol == 1 && _toRow == ExcelPackage.MaxRows && _toCol == ExcelPackage.MaxColumns)
			{
				addr = _worksheet.Dimension;
				if (addr == null) return null;
			}
			else
			{
				addr = this;
			}
			object[,] v = new object[addr._toRow - addr._fromRow + 1, addr._toCol - addr._fromCol + 1];

			for (int col = addr._fromCol; col <= addr._toCol; col++)
			{
				for (int row = addr._fromRow; row <= addr._toRow; row++)
				{
					if (_worksheet._cells.ContainsKey(GetCellID(_worksheet.SheetID, row, col)))
					{
						if (IsRichText)
						{
							v[row - addr._fromRow, col - addr._fromCol] = GetRichText(row, col).Text;
						}
						else
						{
							v[row - addr._fromRow, col - addr._fromCol] = _worksheet.Cell(row, col).Value;
						}
					}
				}
			}
			return v;
		}
		private ExcelAddressBase GetAddressDim(ExcelRangeBase addr)
		{
			int fromRow, fromCol, toRow, toCol;
			var d = _worksheet.Dimension;
			fromRow = addr._fromRow < d._fromRow ? d._fromRow : addr._fromRow;
			fromCol = addr._fromCol < d._fromCol ? d._fromCol : addr._fromCol;

			toRow = addr._toRow > d._toRow ? d._toRow : addr._toRow;
			toCol = addr._toCol > d._toCol ? d._toCol : addr._toCol;

			if (addr._fromCol == fromRow && addr._fromCol == addr._fromCol && addr._toRow == toRow && addr._toCol == _toCol)
			{
				return addr;
			}
			else
			{
				if (_fromRow > _toRow || _fromCol > _toCol)
				{
					return null;
				}
				else
				{
					return new ExcelAddressBase(fromRow, fromCol, toRow, toCol);
				}
			}
		}

		private object GetSingleValue()
		{
			if (IsRichText)
			{
				return RichText.Text;
			}
			else
			{
				return _worksheet.Cell(_fromRow, _fromCol).Value;
			}
		}
		/// <summary>
		/// Returns the formatted value.
		/// </summary>
		public string Text
		{
			get
			{
				return GetFormatedText(false);
			}
		}
		/// <summary>
		/// Set the column width from the content of the range. The minimum width is the value of the ExcelWorksheet.defaultColumnWidth property.
		/// Note: Cells containing formulas are ignored since EPPlus don't have a calculation engine.
		/// Wrapped and merged cells are also ignored.
		/// </summary>
		public void AutoFitColumns()
		{
			AutoFitColumns(_worksheet.DefaultColWidth);
		}

		/// <summary>
		/// Set the column width from the content of the range.
		/// Note: Cells containing formulas are ignored since EPPlus don't have a calculation engine.
		///       Wrapped and merged cells are also ignored.
		/// </summary>
        /// <remarks>This method will not work if you run in an environment that does not support GDI</remarks>
		/// <param name="MinimumWidth">Minimum column width</param>
		public void AutoFitColumns(double MinimumWidth)
		{
		    AutoFitColumns(MinimumWidth, double.MaxValue);
		}

	    /// <summary>
	    /// Set the column width from the content of the range.
	    /// Note: Cells containing formulas are ignored since EPPlus don't have a calculation engine.
	    ///       Wrapped and merged cells are also ignored.
	    /// </summary>
	    /// <param name="MinimumWidth">Minimum column width</param>
	    /// <param name="MaximumWidth">Maximum column width</param>
	    public void AutoFitColumns(double MinimumWidth, double MaximumWidth)
		{
			if (_fromCol < 1 || _fromRow < 1)
			{
				SetToSelectedRange();
			}
			Dictionary<int, Font> fontCache = new Dictionary<int, Font>();
			Font f;

			bool doAdjust = _worksheet._package.DoAdjustDrawings;
			_worksheet._package.DoAdjustDrawings = false;
			var drawWidths = _worksheet.Drawings.GetDrawingWidths();

			int fromCol = _fromCol > _worksheet.Dimension._fromCol ? _fromCol : _worksheet.Dimension._fromCol;
			int toCol = _toCol < _worksheet.Dimension._toCol ? _toCol : _worksheet.Dimension._toCol;
			if (Addresses == null)
			{
				for (int col = fromCol; col <= toCol; col++)
				{
					_worksheet.Column(col).Width = MinimumWidth;
				}
			}
			else
			{
				foreach (var addr in Addresses)
				{
					fromCol = addr._fromCol > _worksheet.Dimension._fromCol ? addr._fromCol : _worksheet.Dimension._fromCol;
					toCol = addr._toCol < _worksheet.Dimension._toCol ? addr._toCol : _worksheet.Dimension._toCol;
					for (int col = fromCol; col <= toCol; col++)
					{
						_worksheet.Column(col).Width = MinimumWidth;
					}
				}
			}

			//Get any autofilter to widen these columns
			List<ExcelAddressBase> afAddr = new List<ExcelAddressBase>();
			if (_worksheet.AutoFilterAddress != null)
			{
				afAddr.Add(new ExcelAddressBase(_worksheet.AutoFilterAddress._fromRow,
																				_worksheet.AutoFilterAddress._fromCol,
																				_worksheet.AutoFilterAddress._fromRow,
																				_worksheet.AutoFilterAddress._toCol));
				afAddr[afAddr.Count - 1]._ws = WorkSheet;
			}
			foreach (var tbl in _worksheet.Tables)
			{
				if (tbl.AutoFilterAddress != null)
				{
					afAddr.Add(new ExcelAddressBase(tbl.AutoFilterAddress._fromRow,
																			tbl.AutoFilterAddress._fromCol,
																			tbl.AutoFilterAddress._fromRow,
																			tbl.AutoFilterAddress._toCol));
					afAddr[afAddr.Count - 1]._ws = WorkSheet;
				}
			}

			var styles = _worksheet.Workbook.Styles;
			var nf = styles.Fonts[styles.CellXfs[0].FontId];
			FontStyle fs = FontStyle.Regular;
			if (nf.Bold) fs |= FontStyle.Bold;
			if (nf.UnderLine) fs |= FontStyle.Underline;
			if (nf.Italic) fs |= FontStyle.Italic;
			if (nf.Strike) fs |= FontStyle.Strikeout;
			var nfont = new Font(nf.Name, nf.Size, fs);
            
			using (Bitmap b = new Bitmap(1, 1))
			{
				using (Graphics g = Graphics.FromImage(b))
				{
					float normalSize = (float)Math.Truncate(g.MeasureString("00", nfont).Width - g.MeasureString("0", nfont).Width);
					g.PageUnit = GraphicsUnit.Pixel;
					foreach (var cell in this)
					{
						if (cell.Merge == true || cell.Style.WrapText) continue;
						var fntID = styles.CellXfs[cell.StyleID].FontId;
						if (fontCache.ContainsKey(fntID))
						{
							f = fontCache[fntID];
						}
						else
						{
							var fnt = styles.Fonts[fntID];
							fs = FontStyle.Regular;
							if (fnt.Bold) fs |= FontStyle.Bold;
							if (fnt.UnderLine) fs |= FontStyle.Underline;
							if (fnt.Italic) fs |= FontStyle.Italic;
							if (fnt.Strike) fs |= FontStyle.Strikeout;
							f = new Font(fnt.Name, fnt.Size, fs);
							fontCache.Add(fntID, f);
						}

						//Truncate(({pixels}-5)/{Maximum Digit Width} * 100+0.5)/100

                        var size = g.MeasureString(cell.TextForWidth, f);
                        double width;
                        double r = styles.CellXfs[cell.StyleID].TextRotation;
                        if (r <= 0 )
                        {
                            width = (size.Width + 5) / normalSize;
                        }
                        else
                        {
                            r = (r <= 90 ? r : r - 90);
                            width = (((size.Width - size.Height) * Math.Abs(System.Math.Cos(System.Math.PI * r / 180.0)) + size.Height) + 5) / normalSize;
                        }

						foreach (var a in afAddr)
						{
							if (a.Collide(cell) != eAddressCollition.No)
							{
								width += 2.25;
								break;
							}
						}

						if (width > _worksheet.Column(cell._fromCol).Width)
						{
							_worksheet.Column(cell._fromCol).Width = width > MaximumWidth ? MaximumWidth : width;
						}
					}
				}
			}
			_worksheet.Drawings.AdjustWidth(drawWidths);
			_worksheet._package.DoAdjustDrawings = doAdjust;
		}

		internal string TextForWidth
		{
			get
			{
				return GetFormatedText(true);
			}
		}
		private string GetFormatedText(bool forWidthCalc)
		{
			object v = Value;
			if (v == null) return "";
			var styles = Worksheet.Workbook.Styles;
			var nfID = styles.CellXfs[StyleID].NumberFormatId;
			ExcelNumberFormatXml.ExcelFormatTranslator nf = null;
			for (int i = 0; i < styles.NumberFormats.Count; i++)
			{
				if (nfID == styles.NumberFormats[i].NumFmtId)
				{
					nf = styles.NumberFormats[i].FormatTranslator;
					break;
				}
			}

			string format, textFormat;
			if (forWidthCalc)
			{
				format = nf.NetFormatForWidth;
				textFormat = nf.NetTextFormatForWidth;
			}
			else
			{
				format = nf.NetFormat;
				textFormat = nf.NetTextFormat;
			}

			if (v is decimal || v.GetType().IsPrimitive)
			{
				double d;
				try
				{
					d = Convert.ToDouble(v);
				}
				catch
				{
					return "";
				}

				if (nf.DataType == ExcelNumberFormatXml.eFormatType.Number)
				{
					if (string.IsNullOrEmpty(nf.FractionFormat))
					{
						return d.ToString(format, nf.Culture);
					}
					else
					{
						return nf.FormatFraction(d);
					}
				}
				else if (nf.DataType == ExcelNumberFormatXml.eFormatType.DateTime)
				{
					var date = DateTime.FromOADate(d);
					return date.ToString(format, nf.Culture);
				}
			}
			else if (v is DateTime)
			{
				if (nf.DataType == ExcelNumberFormatXml.eFormatType.DateTime)
				{
					return ((DateTime)v).ToString(format, nf.Culture);
				}
				else
				{
					double d = ((DateTime)v).ToOADate();
					if (string.IsNullOrEmpty(nf.FractionFormat))
					{
						return d.ToString(format, nf.Culture);
					}
					else
					{
						return nf.FormatFraction(d);
					}
				}
			}
			else if (v is TimeSpan)
			{
				if (nf.DataType == ExcelNumberFormatXml.eFormatType.DateTime)
				{
					return new DateTime(((TimeSpan)v).Ticks).ToString(format, nf.Culture);
				}
				else
				{
					double d = (new DateTime(((TimeSpan)v).Ticks)).ToOADate();
					if (string.IsNullOrEmpty(nf.FractionFormat))
					{
						return d.ToString(format, nf.Culture);
					}
					else
					{
						return nf.FormatFraction(d);
					}
				}
			}
			else
			{
				if (textFormat == "")
				{
					return v.ToString();
				}
				else
				{
					return string.Format(textFormat, v);
				}
			}
			return v.ToString();
		}
		/// <summary>
		/// Gets or sets a formula for a range.
		/// </summary>
		public string Formula
		{
			get
			{
				if (IsName)
				{
					if (_worksheet == null)
					{
						return _workbook._names[_address].NameFormula;
					}
					else
					{
						return _worksheet.Names[_address].NameFormula;
					}
				}
				else
				{
					return _worksheet.Cell(_fromRow, _fromCol).Formula;
				}
			}
			set
			{
				if (IsName)
				{
					if (_worksheet == null)
					{
						_workbook._names[_address].NameFormula = value;
					}
					else
					{
						_worksheet.Names[_address].NameFormula = value;
					}
				}
				else
				{
					if (_fromRow == _toRow && _fromCol == _toCol)
					{
						Set_Formula(value, _fromRow, _fromCol);
					}
					else
					{
						Set_SharedFormula(value, this, false);
						if (Addresses != null)
						{
							foreach (var address in Addresses)
							{
								Set_SharedFormula(value, address, false);
							}
						}
					}
				}
			}
		}
		/// <summary>
		/// Gets or Set a formula in R1C1 format.
		/// </summary>
		public string FormulaR1C1
		{
			get
			{
				IsRangeValid("FormulaR1C1");
				return _worksheet.Cell(_fromRow, _fromCol).FormulaR1C1;
			}
			set
			{
				IsRangeValid("FormulaR1C1");
				if (value.Length > 0 && value[0] == '=') value = value.Substring(1, value.Length - 1); // remove any starting equalsign.

				if (Addresses == null)
				{
					Set_SharedFormula(ExcelCell.TranslateFromR1C1(value, _fromRow, _fromCol), this, false);
				}
				else
				{
					Set_SharedFormula(ExcelCell.TranslateFromR1C1(value, _fromRow, _fromCol), new ExcelAddress(FirstAddress), false);
					foreach (var address in Addresses)
					{
						Set_SharedFormula(ExcelCell.TranslateFromR1C1(value, address.Start.Row, address.Start.Column), address, false);
					}
				}
			}
		}
		/// <summary>
		/// Set the hyperlink property for a range of cells
		/// </summary>
		public Uri Hyperlink
		{
			get
			{
				IsRangeValid("formulaR1C1");
				return _worksheet.Cell(_fromRow, _fromCol).Hyperlink;
			}
			set
			{
				_changePropMethod(Set_HyperLink, value);
			}
		}
		/// <summary>
		/// If the cells in the range are merged.
		/// </summary>
		public bool Merge
		{
			get
			{
				IsRangeValid("merging");
				for (int col = _fromCol; col <= _toCol; col++)
				{
					for (int row = _fromRow; row <= _toRow; row++)
					{
						if (!_worksheet.Cell(row, col).Merge)
						{
							return false;
						}
					}
				}
				return true;
			}
			set
			{
				IsRangeValid("merging");
				SetMerge(value, FirstAddress);
				if (Addresses != null)
				{
					foreach (var address in Addresses)
					{
						SetMerge(value, address._address);
					}
				}
			}
		}

		private void SetMerge(bool value, string address)
		{
			if (!value)
			{
				if (_worksheet.MergedCells.List.Contains(address))
				{
					SetCellMerge(false, address);
					_worksheet.MergedCells.List.Remove(address);
				}
				else if (!CheckMergeDiff(false, address))
				{
					throw (new Exception("Range is not fully merged.Specify the exact range"));
				}
			}
			else
			{
				if (CheckMergeDiff(false, address))
				{
					SetCellMerge(true, address);
					_worksheet.MergedCells.List.Add(address);
				}
				else
				{
					if (!_worksheet.MergedCells.List.Contains(address))
					{
						throw (new Exception("Cells are already merged"));
					}
				}
			}
		}
		/// <summary>
		/// Set an autofilter for the range
		/// </summary>
		public bool AutoFilter
		{
			get
			{
				IsRangeValid("autofilter");
				ExcelAddressBase address = _worksheet.AutoFilterAddress;
				if (address == null) return false;
				if (_fromRow >= address.Start.Row
						&&
						_toRow <= address.End.Row
						&&
						_fromCol >= address.Start.Column
						&&
						_toCol <= address.End.Column)
				{
					return true;
				}
				return false;
			}
			set
			{
				IsRangeValid("autofilter");
				_worksheet.AutoFilterAddress = this;
				if (_worksheet.Names.ContainsKey("_xlnm._FilterDatabase"))
				{
					_worksheet.Names.Remove("_xlnm._FilterDatabase");
				}
				var result = _worksheet.Names.Add("_xlnm._FilterDatabase", this);
				result.IsNameHidden = true;
			}
		}
		/// <summary>
		/// If the value is in richtext format.
		/// </summary>
		public bool IsRichText
		{
			get
			{
				IsRangeValid("richtext");
				return _worksheet.Cell(_fromRow, _fromCol).IsRichText;
			}
			set
			{
				_changePropMethod(Set_IsRichText, value);
			}
		}
		/// <summary>
		/// Is the range a part of an Arrayformula
		/// </summary>
		public bool IsArrayFormula
		{
			get
			{
				IsRangeValid("arrayformulas");
				return _worksheet.Cell(_fromRow, _fromCol).IsArrayFormula;
			}
		}
		ExcelRichTextCollection _rtc = null;
		/// <summary>
		/// Cell value is richtext formated. 
		/// </summary>
		public ExcelRichTextCollection RichText
		{
			get
			{
				IsRangeValid("richtext");
				if (_rtc == null)
				{
					_rtc = GetRichText(_fromRow, _fromCol);
				}
				return _rtc;
			}
		}

		private ExcelRichTextCollection GetRichText(int row, int col)
		{
			XmlDocument xml = new XmlDocument();
			var cell = _worksheet.Cell(row, col);
			if (cell.Value != null)
			{
				if (cell.IsRichText)
				{
                    XmlHelper.LoadXmlSafe(xml, "<d:si xmlns:d=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" >" + cell.Value.ToString() + "</d:si>", Encoding.UTF8);
				}
				else
				{
					xml.LoadXml("<d:si xmlns:d=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" ><d:r><d:t>" + SecurityElement.Escape(cell.Value.ToString()) + "</d:t></d:r></d:si>");
				}
			}
			else
			{
				xml.LoadXml("<d:si xmlns:d=\"http://schemas.openxmlformats.org/spreadsheetml/2006/main\" />");
			}
			var rtc = new ExcelRichTextCollection(_worksheet.NameSpaceManager, xml.SelectSingleNode("d:si", _worksheet.NameSpaceManager), this);
			if (rtc.Count == 1 && cell.IsRichText == false)
			{
				IsRichText = true;
				var fnt = cell.Style.Font;
				rtc[0].PreserveSpace = true;
				rtc[0].Bold = fnt.Bold;
				rtc[0].FontName = fnt.Name;
				rtc[0].Italic = fnt.Italic;
				rtc[0].Size = fnt.Size;
				rtc[0].UnderLine = fnt.UnderLine;

				int hex;
				if (fnt.Color.Rgb != "" && int.TryParse(fnt.Color.Rgb, NumberStyles.HexNumber, null, out hex))
				{
					rtc[0].Color = Color.FromArgb(hex);
				}

			}
			return rtc;
		}
		/// <summary>
		/// returns the comment object of the first cell in the range
		/// </summary>
		public ExcelComment Comment
		{
			get
			{
				IsRangeValid("comments");
				ulong cellID = GetCellID(_worksheet.SheetID, _fromRow, _fromCol);
				if (_worksheet.Comments._comments.ContainsKey(cellID))
				{
					return _worksheet._comments._comments[cellID] as ExcelComment;
				}
				return null;
			}
		}
		/// <summary>
		/// WorkSheet object 
		/// </summary>
		public ExcelWorksheet Worksheet
		{
			get
			{
				return _worksheet;
			}
		}
		/// <summary>
		/// Address including sheetname
		/// </summary>
		public string FullAddress
		{
			get
			{
				string fullAddress = GetFullAddress(_worksheet.Name, _address);
				if (Addresses != null)
				{
					foreach (var a in Addresses)
					{
						fullAddress += "," + GetFullAddress(_worksheet.Name, a.Address); ;
					}
				}
				return fullAddress;
			}
		}
		/// <summary>
		/// Address including sheetname
		/// </summary>
		public string FullAddressAbsolute
		{
			get
			{
				string wbwsRef = string.IsNullOrEmpty(base._wb) ? base._ws : "[" + base._wb.Replace("'", "''") + "]" + _ws;
				string fullAddress = GetFullAddress(wbwsRef, GetAddress(_fromRow, _fromCol, _toRow, _toCol, true));
				if (Addresses != null)
				{
					foreach (var a in Addresses)
					{
						fullAddress += "," + GetFullAddress(wbwsRef, GetAddress(a.Start.Row, a.Start.Column, a.End.Row, a.End.Column, true)); ;
					}
				}
				return fullAddress;
			}
		}
        /// <summary>
        /// Address including sheetname
        /// </summary>
        internal string FullAddressAbsoluteNoFullRowCol
        {
            get
            {
                string wbwsRef = string.IsNullOrEmpty(base._wb) ? base._ws : "[" + base._wb.Replace("'", "''") + "]" + _ws;
                string fullAddress = GetFullAddress(wbwsRef, GetAddress(_fromRow, _fromCol, _toRow, _toCol, true), false);
                if (Addresses != null)
                {
                    foreach (var a in Addresses)
                    {
                        fullAddress += "," + GetFullAddress(wbwsRef, GetAddress(a.Start.Row, a.Start.Column, a.End.Row, a.End.Column, true),false); ;
                    }
                }
                return fullAddress;
            }
        }
		#endregion
		#region Private Methods
		/// <summary>
		/// Check if the range is partly merged
		/// </summary>
		/// <param name="startValue">the starting value</param>
		/// <param name="address">the address</param>
		/// <returns></returns>
		private bool CheckMergeDiff(bool startValue, string address)
		{
			ExcelAddress a = new ExcelAddress(address);
			for (int col = a._fromCol; col <= a._toCol; col++)
			{
				for (int row = a._fromRow; row <= a._toRow; row++)
				{
					if (_worksheet.Cell(row, col).Merge != startValue)
					{
						return false;
					}
				}
			}
			return true;
		}
		/// <summary>
		/// Set the merge flag for the range
		/// </summary>
		/// <param name="value"></param>
		/// <param name="address"></param>
		internal void SetCellMerge(bool value, string address)
		{
			ExcelAddress a = new ExcelAddress(address);
			for (int col = a._fromCol; col <= a._toCol; col++)
			{
				for (int row = a._fromRow; row <= a._toRow; row++)
				{
					_worksheet.Cell(row, col).Merge = value;
				}
			}
		}
		/// <summary>
		/// Set the value without altering the richtext property
		/// </summary>
		/// <param name="value">the value</param>
		internal void SetValueRichText(object value)
		{
			if (_fromRow == 1 && _fromCol == 1 && _toRow == ExcelPackage.MaxRows && _toCol == ExcelPackage.MaxColumns)  //Full sheet (ex ws.Cells.Value=0). Set value for A1 only to avoid hanging 
			{
				_worksheet.Cell(1, 1).SetValueRichText(value);
			}
			else
			{
				for (int col = _fromCol; col <= _toCol; col++)
				{
					for (int row = _fromRow; row <= _toRow; row++)
					{
						_worksheet.Cell(row, col).SetValueRichText(value);
					}
				}
			}
		}
		/// <summary>
		/// Removes a shared formula
		/// </summary>
		private void RemoveFormuls(ExcelAddress address)
		{
			List<int> removed = new List<int>();
			int fFromRow, fFromCol, fToRow, fToCol;
			foreach (int index in _worksheet._sharedFormulas.Keys)
			{
				ExcelWorksheet.Formulas f = _worksheet._sharedFormulas[index];
				ExcelCell.GetRowColFromAddress(f.Address, out fFromRow, out fFromCol, out fToRow, out fToCol);
				if (((fFromCol >= address.Start.Column && fFromCol <= address.End.Column) ||
					 (fToCol >= address.Start.Column && fToCol <= address.End.Column)) &&
					 ((fFromRow >= address.Start.Row && fFromRow <= address.End.Row) ||
					 (fToRow >= address.Start.Row && fToRow <= address.End.Row)))
				{
					for (int col = fFromCol; col <= fToCol; col++)
					{
						for (int row = fFromRow; row <= fToRow; row++)
						{
							_worksheet.Cell(row, col).SharedFormulaID = int.MinValue;
						}
					}
					removed.Add(index);
				}
			}
			foreach (int index in removed)
			{
				_worksheet._sharedFormulas.Remove(index);
			}
		}
		internal void SetSharedFormulaID(int id)
		{
			for (int col = _fromCol; col <= _toCol; col++)
			{
				for (int row = _fromRow; row <= _toRow; row++)
				{
					_worksheet.Cell(row, col).SharedFormulaID = id;
				}
			}
		}
		private void CheckAndSplitSharedFormula()
		{
			for (int col = _fromCol; col <= _toCol; col++)
			{
				for (int row = _fromRow; row <= _toRow; row++)
				{
					if (_worksheet.Cell(row, col).SharedFormulaID >= 0)
					{
						SplitFormulas();
						return;
					}
				}
			}
		}

		private void SplitFormulas()
		{
			List<int> formulas = new List<int>();
			for (int col = _fromCol; col <= _toCol; col++)
			{
				for (int row = _fromRow; row <= _toRow; row++)
				{
					int id = _worksheet.Cell(row, col).SharedFormulaID;
					if (id >= 0 && !formulas.Contains(id))
					{
						if (_worksheet._sharedFormulas[id].IsArray &&
								Collide(_worksheet.Cells[_worksheet._sharedFormulas[id].Address]) == eAddressCollition.Partly) // If the formula is an array formula and its on inside the overwriting range throw an exception
						{
							throw (new Exception("Can not overwrite a part of an array-formula"));
						}
						formulas.Add(_worksheet.Cell(row, col).SharedFormulaID);
					}
				}
			}

			foreach (int ix in formulas)
			{
				SplitFormula(ix);
			}
		}

		private void SplitFormula(int ix)
		{
			var f = _worksheet._sharedFormulas[ix];
			var fRange = _worksheet.Cells[f.Address];
			var collide = Collide(fRange);

			//The formula is inside the currenct range, remove it
			if (collide == eAddressCollition.Inside)
			{
				_worksheet._sharedFormulas.Remove(ix);
				fRange.SetSharedFormulaID(int.MinValue);
			}
			else if (collide == eAddressCollition.Partly)
			{
				//The formula partly collides with the current range
				bool fIsSet = false;
				string formulaR1C1 = fRange.FormulaR1C1;
				//Top Range
				if (fRange._fromRow < _fromRow)
				{
					f.Address = ExcelCell.GetAddress(fRange._fromRow, fRange._fromCol, _fromRow - 1, fRange._toCol);
					fIsSet = true;
				}
				//Left Range
				if (fRange._fromCol < _fromCol)
				{
					if (fIsSet)
					{
						f = new ExcelWorksheet.Formulas();
						f.Index = _worksheet.GetMaxShareFunctionIndex(false);
						f.StartCol = fRange._fromCol;
						f.IsArray = false;
						_worksheet._sharedFormulas.Add(f.Index, f);
					}
					else
					{
						fIsSet = true;
					}
					if (fRange._fromRow < _fromRow)
						f.StartRow = _fromRow;
					else
					{
						f.StartRow = fRange._fromRow;
					}
					if (fRange._toRow < _toRow)
					{
						f.Address = ExcelCell.GetAddress(f.StartRow, f.StartCol,
								fRange._toRow, _fromCol - 1);
					}
					else
					{
						f.Address = ExcelCell.GetAddress(f.StartRow, f.StartCol,
							 _toRow, _fromCol - 1);
					}
					f.Formula = TranslateFromR1C1(formulaR1C1, f.StartRow, f.StartCol);
					_worksheet.Cells[f.Address].SetSharedFormulaID(f.Index);
				}
				//Right Range
				if (fRange._toCol > _toCol)
				{
					if (fIsSet)
					{
						f = new ExcelWorksheet.Formulas();
						f.Index = _worksheet.GetMaxShareFunctionIndex(false);
						f.IsArray = false;
						_worksheet._sharedFormulas.Add(f.Index, f);
					}
					else
					{
						fIsSet = true;
					}
					f.StartCol = _toCol + 1;
					if (_fromRow < fRange._fromRow)
						f.StartRow = fRange._fromRow;
					else
					{
						f.StartRow = _fromRow;
					}

					if (fRange._toRow < _toRow)
					{
						f.Address = ExcelCell.GetAddress(f.StartRow, f.StartCol,
								fRange._toRow, fRange._toCol);
					}
					else
					{
						f.Address = ExcelCell.GetAddress(f.StartRow, f.StartCol,
								_toRow, fRange._toCol);
					}
					f.Formula = TranslateFromR1C1(formulaR1C1, f.StartRow, f.StartCol);
					_worksheet.Cells[f.Address].SetSharedFormulaID(f.Index);
				}
				//Bottom Range
				if (fRange._toRow > _toRow)
				{
					if (fIsSet)
					{
						f = new ExcelWorksheet.Formulas();
						f.Index = _worksheet.GetMaxShareFunctionIndex(false);
						f.IsArray = false;
						_worksheet._sharedFormulas.Add(f.Index, f);
					}

					f.StartCol = fRange._fromCol;
					f.StartRow = _toRow + 1;

					f.Formula = TranslateFromR1C1(formulaR1C1, f.StartRow, f.StartCol);

					f.Address = ExcelCell.GetAddress(f.StartRow, f.StartCol,
							fRange._toRow, fRange._toCol);
					_worksheet.Cells[f.Address].SetSharedFormulaID(f.Index);

				}
			}
		}
		private object ConvertData(ExcelTextFormat Format, string v, int col, bool isText)
		{
			if (isText && (Format.DataTypes == null || Format.DataTypes.Length < col)) return v;

			double d;
			DateTime dt;
			if (Format.DataTypes == null || Format.DataTypes.Length < col || Format.DataTypes[col] == eDataTypes.Unknown)
			{
				string v2 = v.EndsWith("%") ? v.Substring(0, v.Length - 1) : v;
				if (double.TryParse(v2, NumberStyles.Any, Format.Culture, out d))
				{
					if (v2 == v)
					{
						return d;
					}
					else
					{
						return d / 100;
					}
				}
				if (DateTime.TryParse(v, Format.Culture, DateTimeStyles.None, out dt))
				{
					return dt;
				}
				else
				{
					return v;
				}
			}
			else
			{
				switch (Format.DataTypes[col])
				{
					case eDataTypes.Number:
						if (double.TryParse(v, NumberStyles.Any, Format.Culture, out d))
						{
							return d;
						}
						else
						{
							return v;
						}
					case eDataTypes.DateTime:
						if (DateTime.TryParse(v, Format.Culture, DateTimeStyles.None, out dt))
						{
							return dt;
						}
						else
						{
							return v;
						}
					case eDataTypes.Percent:
						string v2 = v.EndsWith("%") ? v.Substring(0, v.Length - 1) : v;
						if (double.TryParse(v2, NumberStyles.Any, Format.Culture, out d))
						{
							return d / 100;
						}
						else
						{
							return v;
						}

					default:
						return v;

				}
			}
		}
		#endregion
		#region Public Methods
		#region ConditionalFormatting
		/// <summary>
		/// Conditional Formatting for this range.
		/// </summary>
		public IRangeConditionalFormatting ConditionalFormatting
		{
			get
			{
				return new RangeConditionalFormatting(_worksheet, new ExcelAddress(Address));
			}
		}
		#endregion
		#region DataValidation
		/// <summary>
		/// Data validation for this range.
		/// </summary>
		public IRangeDataValidation DataValidation
		{
			get
			{
                return new RangeDataValidation(_worksheet, Address);
			}
		}
		#endregion
		#region LoadFromDataTable
		/// <summary>
		/// Load the data from the datatable starting from the top left cell of the range
		/// </summary>
		/// <param name="Table">The datatable to load</param>
		/// <param name="PrintHeaders">Print the column caption property (if set) or the columnname property if not, on first row</param>
		/// <param name="TableStyle">The table style to apply to the data</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromDataTable(DataTable Table, bool PrintHeaders, TableStyles TableStyle)
		{
			var r = LoadFromDataTable(Table, PrintHeaders);

			int rows = Table.Rows.Count + (PrintHeaders ? 1 : 0) - 1;
            if (rows >= 0 && Table.Columns.Count>0)
			{
                var tbl = _worksheet.Tables.Add(new ExcelAddressBase(_fromRow, _fromCol, _fromRow + (rows==0 ? 1 : rows), _fromCol + Table.Columns.Count-1), Table.TableName);
				tbl.ShowHeader = PrintHeaders;
				tbl.TableStyle = TableStyle;
			}
		    return r;
		}
		/// <summary>
		/// Load the data from the datatable starting from the top left cell of the range
		/// </summary>
		/// <param name="Table">The datatable to load</param>
		/// <param name="PrintHeaders">Print the caption property (if set) or the columnname property if not, on first row</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromDataTable(DataTable Table, bool PrintHeaders)
		{
			if (Table == null)
			{
				throw (new ArgumentNullException("Table can't be null"));
			}

			int col = _fromCol, row = _fromRow;
			if (PrintHeaders)
			{
				foreach (DataColumn dc in Table.Columns)
				{
                    // If no caption is set, the ColumnName property is called implicitly.
					_worksheet.Cell(row, col++).Value = dc.Caption;
				}
				row++;
				col = _fromCol;
			}
			foreach (DataRow dr in Table.Rows)
			{
				foreach (object value in dr.ItemArray)
				{
					_worksheet.Cell(row, col++).Value = value;
				}
				row++;
				col = _fromCol;
			}
            return _worksheet.Cells[_fromRow, _fromCol, row - 1, _fromCol + Table.Columns.Count - 1];
		}
		#endregion
		#region LoadFromArrays
		/// <summary>
		/// Loads data from the collection of arrays of objects into the range, starting from
		/// the top-left cell.
		/// </summary>
		/// <param name="Data">The data.</param>
		public ExcelRangeBase LoadFromArrays(IEnumerable<object[]> Data)
		{
			//thanx to Abdullin for the code contribution
			if (Data == null) throw new ArgumentNullException("data");

			int column = _fromCol, row = _fromRow;

			foreach (var rowData in Data)
			{
				column = _fromCol;
				foreach (var cellData in rowData)
				{
					_worksheet.Cell(row, column).Value = cellData;
					column += 1;
				}
				row += 1;
			}
			return _worksheet.Cells[_fromRow, _fromCol, row - 1, column - 1];
		}
		#endregion
		#region LoadFromCollection
		/// <summary>
		/// Load a collection into a the worksheet starting from the top left row of the range.
		/// </summary>
		/// <typeparam name="T">The datatype in the collection</typeparam>
		/// <param name="Collection">The collection to load</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromCollection<T>(IEnumerable<T> Collection)
		{
			return LoadFromCollection<T>(Collection, false, TableStyles.None, BindingFlags.Public | BindingFlags.Instance, null);
		}
		/// <summary>
		/// Load a collection of T into the worksheet starting from the top left row of the range.
		/// Default option will load all public instance properties of T
		/// </summary>
		/// <typeparam name="T">The datatype in the collection</typeparam>
		/// <param name="Collection">The collection to load</param>
		/// <param name="PrintHeaders">Print the property names on the first row</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromCollection<T>(IEnumerable<T> Collection, bool PrintHeaders)
		{
			return LoadFromCollection<T>(Collection, PrintHeaders, TableStyles.None, BindingFlags.Public | BindingFlags.Instance, null);
		}
		/// <summary>
		/// Load a collection of T into the worksheet starting from the top left row of the range.
		/// Default option will load all public instance properties of T
		/// </summary>
		/// <typeparam name="T">The datatype in the collection</typeparam>
		/// <param name="Collection">The collection to load</param>
		/// <param name="PrintHeaders">Print the property names on the first row</param>
		/// <param name="TableStyle">Will create a table with this style. If set to TableStyles.None no table will be created</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromCollection<T>(IEnumerable<T> Collection, bool PrintHeaders, TableStyles TableStyle)
		{
			return LoadFromCollection<T>(Collection, PrintHeaders, TableStyle, BindingFlags.Public | BindingFlags.Instance, null);
		}
		/// <summary>
		/// Load a collection into the worksheet starting from the top left row of the range.
		/// </summary>
		/// <typeparam name="T">The datatype in the collection</typeparam>
		/// <param name="Collection">The collection to load</param>
		/// <param name="PrintHeaders">Print the property names on the first row. Any underscore in the property name will be converted to a space.</param>
		/// <param name="TableStyle">Will create a table with this style. If set to TableStyles.None no table will be created</param>
		/// <param name="memberFlags">Property flags to use</param>
		/// <param name="Members">The properties to output. Must be of type T</param>
		/// <returns>The filled range</returns>
		public ExcelRangeBase LoadFromCollection<T>(IEnumerable<T> Collection, bool PrintHeaders, TableStyles TableStyle, BindingFlags memberFlags, MemberInfo[] Members)
		{
			var type = typeof(T);
			if (Members == null)
			{
				Members = type.GetProperties(memberFlags);
			}
			else
			{
				foreach (var t in Members)
				{
					if (t.DeclaringType != type)
					{
						throw (new Exception("Supplied properties in parameter Properties must be of the same type as T"));
					}
				}
			}

			int col = _fromCol, row = _fromRow;
			if (Members.Length > 0 && PrintHeaders)
			{
				foreach (var t in Members)
				{
					_worksheet.Cell(row, col++).Value = t.Name.Replace('_', ' ');
				}
				row++;
			}

			if (Members.Length == 0)
			{
				foreach (var item in Collection)
				{
					_worksheet.Cells[row++, col].Value = item;
				}
			}
			else
			{
				foreach (var item in Collection)
				{
					col = _fromCol;
                    if (item is string || item is decimal || item is DateTime || item.GetType().IsPrimitive)
                    {
                        _worksheet.Cells[row, col++].Value = item;
                    }
                    else
                    {
                        foreach (var t in Members)
                        {
                            if (t is PropertyInfo)
                            {
                                _worksheet.Cells[row, col++].Value = ((PropertyInfo)t).GetValue(item, null);
                            }
                            else if (t is FieldInfo)
                            {
                                _worksheet.Cells[row, col++].Value = ((FieldInfo)t).GetValue(item);
                            }
                            else if (t is MethodInfo)
                            {
                                _worksheet.Cells[row, col++].Value = ((MethodInfo)t).Invoke(item, null);
                            }
                        }
                    }
					row++;
				}
			}

            var r = _worksheet.Cells[_fromRow, _fromCol, row - 1, Members.Length==0 ? col : col - 1];

			if (TableStyle != TableStyles.None)
			{
				var tbl = _worksheet.Tables.Add(r, "");
				tbl.ShowHeader = PrintHeaders;
				tbl.TableStyle = TableStyle;
			}
			return r;
		}
		#endregion
		#region LoadFromText
		/// <summary>
		/// Loads a CSV text into a range starting from the top left cell.
		/// Default settings is Comma separation
		/// </summary>
		/// <param name="Text">The Text</param>
		/// <returns>The range containing the data</returns>
		public ExcelRangeBase LoadFromText(string Text)
		{
			return LoadFromText(Text, new ExcelTextFormat());
		}
		/// <summary>
		/// Loads a CSV text into a range starting from the top left cell.
		/// </summary>
		/// <param name="Text">The Text</param>
		/// <param name="Format">Information how to load the text</param>
		/// <returns>The range containing the data</returns>
		public ExcelRangeBase LoadFromText(string Text, ExcelTextFormat Format)
		{
            if (string.IsNullOrEmpty(Text))
            {
                var r = _worksheet.Cells[_fromRow, _fromCol];
                r.Value = "";
                return r;
            }
            
            if (Format == null) Format = new ExcelTextFormat();

            string[] lines = Regex.Split(Text, Format.EOL);
			int row = _fromRow;
			int col = _fromCol;
			int maxCol = col;
			int lineNo = 1;
			foreach (string line in lines)
			{
				if (lineNo > Format.SkipLinesBeginning && lineNo <= lines.Length - Format.SkipLinesEnd)
				{
					col = _fromCol;
					string v = "";
					bool isText = false, isQualifier = false;
					int QCount = 0;
					foreach (char c in line)
					{
						if (Format.TextQualifier != 0 && c == Format.TextQualifier)
						{
							if (!isText && v != "")
							{
								throw (new Exception(string.Format("Invalid Text Qualifier in line : {0}", line)));
							}
							isQualifier = !isQualifier;
							QCount += 1;
							isText = true;
						}
						else
						{
                            if (QCount > 1 && !string.IsNullOrEmpty(v))
							{
								v += new string(Format.TextQualifier, QCount / 2);
							}
                            else if(QCount>2 && string.IsNullOrEmpty(v))
                            {
                                v += new string(Format.TextQualifier, (QCount-1) / 2);
                            }

							if (isQualifier)
							{
								v += c;
							}
							else
							{
								if (c == Format.Delimiter)
								{
									_worksheet.Cell(row, col).Value = ConvertData(Format, v, col - _fromCol, isText);
									v = "";
									isText = false;
									col++;
								}
								else
								{
									if (QCount % 2 == 1)
									{
										throw (new Exception(string.Format("Text delimiter is not closed in line : {0}", line)));
									}
									v += c;
								}
							}
							QCount = 0;
						}
					}
					if (QCount > 1)
					{
						v += new string(Format.TextQualifier, QCount / 2);
					}

					_worksheet.Cell(row, col).Value = ConvertData(Format, v, col - _fromCol, isText);
					if (col > maxCol) maxCol = col;
					row++;
				}
				lineNo++;
			}
			return _worksheet.Cells[_fromRow, _fromCol, row - 1, maxCol];
		}
		/// <summary>
		/// Loads a CSV text into a range starting from the top left cell.
		/// </summary>
		/// <param name="Text">The Text</param>
		/// <param name="Format">Information how to load the text</param>
		/// <param name="TableStyle">Create a table with this style</param>
		/// <param name="FirstRowIsHeader">Use the first row as header</param>
		/// <returns></returns>
		public ExcelRangeBase LoadFromText(string Text, ExcelTextFormat Format, TableStyles TableStyle, bool FirstRowIsHeader)
		{
			var r = LoadFromText(Text, Format);

			var tbl = _worksheet.Tables.Add(r, "");
			tbl.ShowHeader = FirstRowIsHeader;
			tbl.TableStyle = TableStyle;

			return r;
		}
		/// <summary>
		/// Loads a CSV file into a range starting from the top left cell.
		/// </summary>
		/// <param name="TextFile">The Textfile</param>
		/// <returns></returns>
		public ExcelRangeBase LoadFromText(FileInfo TextFile)
		{
			return LoadFromText(File.ReadAllText(TextFile.FullName, Encoding.ASCII));
		}
		/// <summary>
		/// Loads a CSV file into a range starting from the top left cell.
		/// </summary>
		/// <param name="TextFile">The Textfile</param>
		/// <param name="Format">Information how to load the text</param>
		/// <returns></returns>
		public ExcelRangeBase LoadFromText(FileInfo TextFile, ExcelTextFormat Format)
		{
			return LoadFromText(File.ReadAllText(TextFile.FullName, Format.Encoding), Format);
		}
		/// <summary>
		/// Loads a CSV file into a range starting from the top left cell.
		/// </summary>
		/// <param name="TextFile">The Textfile</param>
		/// <param name="Format">Information how to load the text</param>
		/// <param name="TableStyle">Create a table with this style</param>
		/// <param name="FirstRowIsHeader">Use the first row as header</param>
		/// <returns></returns>
		public ExcelRangeBase LoadFromText(FileInfo TextFile, ExcelTextFormat Format, TableStyles TableStyle, bool FirstRowIsHeader)
		{
			return LoadFromText(File.ReadAllText(TextFile.FullName, Format.Encoding), Format, TableStyle, FirstRowIsHeader);
		}
		#endregion
		#region GetValue
		/// <summary>
		/// Get the strongly typed value of the cell.
		/// </summary>
		/// <typeparam name="T">The type</typeparam>
		/// <returns>The value. If the value can't be converted to the specified type, the default value will be returned</returns>
		public T GetValue<T>()
		{
			return _worksheet.GetTypedValue<T>(Value);
		}
		#endregion
		/// <summary>
		/// Get a range with an offset from the top left cell.
		/// The new range has the same dimensions as the current range
		/// </summary>
		/// <param name="RowOffset">Row Offset</param>
		/// <param name="ColumnOffset">Column Offset</param>
		/// <returns></returns>
		public ExcelRangeBase Offset(int RowOffset, int ColumnOffset)
		{
			if (_fromRow + RowOffset < 1 || _fromCol + ColumnOffset < 1 || _fromRow + RowOffset > ExcelPackage.MaxRows || _fromCol + ColumnOffset > ExcelPackage.MaxColumns)
			{
				throw (new ArgumentOutOfRangeException("Offset value out of range"));
			}
			string address = GetAddress(_fromRow + RowOffset, _fromCol + ColumnOffset, _toRow + RowOffset, _toCol + ColumnOffset);
			return new ExcelRangeBase(_worksheet, address);
		}
		/// <summary>
		/// Get a range with an offset from the top left cell.
		/// </summary>
		/// <param name="RowOffset">Row Offset</param>
		/// <param name="ColumnOffset">Column Offset</param>
		/// <param name="NumberOfRows">Number of rows. Minimum 1</param>
		/// <param name="NumberOfColumns">Number of colums. Minimum 1</param>
		/// <returns></returns>
		public ExcelRangeBase Offset(int RowOffset, int ColumnOffset, int NumberOfRows, int NumberOfColumns)
		{
			if (NumberOfRows < 1 || NumberOfColumns < 1)
			{
				throw (new Exception("Number of rows/columns must be greater than 0"));
			}
			NumberOfRows--;
			NumberOfColumns--;
			if (_fromRow + RowOffset < 1 || _fromCol + ColumnOffset < 1 || _fromRow + RowOffset > ExcelPackage.MaxRows || _fromCol + ColumnOffset > ExcelPackage.MaxColumns ||
				 _fromRow + RowOffset + NumberOfRows < 1 || _fromCol + ColumnOffset + NumberOfColumns < 1 || _fromRow + RowOffset + NumberOfRows > ExcelPackage.MaxRows || _fromCol + ColumnOffset + NumberOfColumns > ExcelPackage.MaxColumns)
			{
				throw (new ArgumentOutOfRangeException("Offset value out of range"));
			}
			string address = GetAddress(_fromRow + RowOffset, _fromCol + ColumnOffset, _fromRow + RowOffset + NumberOfRows, _fromCol + ColumnOffset + NumberOfColumns);
			return new ExcelRangeBase(_worksheet, address);
		}
		/// <summary>
		/// Adds a new comment for the range.
		/// If this range contains more than one cell, the top left comment is returned by the method.
		/// </summary>
		/// <param name="Text"></param>
		/// <param name="Author"></param>
		/// <returns>A reference comment of the top left cell</returns>
		public ExcelComment AddComment(string Text, string Author)
		{
			//Check if any comments exists in the range and throw an exception
			_changePropMethod(Exists_Comment, null);
			//Create the comments
			_changePropMethod(Set_Comment, new string[] { Text, Author });


			return _worksheet.Comments[new ExcelCellAddress(_fromRow, _fromCol)];
		}

		/// <summary>
		/// Copies the range of cells to an other range
		/// </summary>
		/// <param name="Destination">The start cell where the range will be copied.</param>
		public void Copy(ExcelRangeBase Destination)
		{
            bool sameWorkbook = Destination._worksheet.Workbook == _worksheet.Workbook;
            ExcelStyles sourceStyles = _worksheet.Workbook.Styles,
                                    styles = Destination._worksheet.Workbook.Styles;
            Dictionary<int, int> styleCashe = new Dictionary<int, int>();

            //Delete all existing cells;            
            List<ExcelCell> newCells = new List<ExcelCell>();
            Dictionary<ulong, ExcelCell> mergedCells = new Dictionary<ulong, ExcelCell>();
            foreach (var cell in this)
            {
                //Clone the cell
                var copiedCell = (_worksheet._cells[GetCellID(_worksheet.SheetID, cell._fromRow, cell._fromCol)] as ExcelCell);

                var newCell = copiedCell.Clone(Destination._worksheet,
                        Destination._fromRow + (copiedCell.Row - _fromRow),
                        Destination._fromCol + (copiedCell.Column - _fromCol));

                newCell.MergeId = _worksheet.GetMergeCellId(copiedCell.Row, copiedCell.Column);

                //If the formula is shared, remove the shared ID and set the formula for the cell.
                if (newCell._sharedFormulaID >= 0)
                {
                    newCell._sharedFormulaID = int.MinValue;
                    newCell.Formula = cell.Formula;
                }

                if (!string.IsNullOrEmpty(newCell.Formula))
                {
                    newCell.Formula = ExcelCell.UpdateFormulaReferences(newCell.Formula, newCell.Row - copiedCell.Row, (newCell.Column - copiedCell.Column), 1, 1);
                }

                //If its not the same workbook we must copy the styles to the new workbook.
                if (!sameWorkbook)
                {
                    if (styleCashe.ContainsKey(cell.StyleID))
                    {
                        newCell.StyleID = styleCashe[cell.StyleID];
                    }
                    else
                    {
                        newCell.StyleID = styles.CloneStyle(sourceStyles, cell.StyleID);
                        styleCashe.Add(cell.StyleID, newCell.StyleID);
                    }
                }
                newCells.Add(newCell);
                if (newCell.Merge) mergedCells.Add(newCell.CellID, newCell);
            }

            //Now clear the destination.
            Destination.Offset(0, 0, (_toRow - _fromRow) + 1, (_toCol - _fromCol) + 1).Clear();

            //And last add the new cells to the worksheet
            foreach (var cell in newCells)
            {
                Destination.Worksheet._cells.Add(cell);
            }
            //Add merged cells
            if (mergedCells.Count > 0)
            {
                List<ExcelAddressBase> mergedAddresses = new List<ExcelAddressBase>();
                foreach (var cell in mergedCells.Values)
                {
                    if (!IsAdded(cell, mergedAddresses))
                    {
                        int startRow = cell.Row, startCol = cell.Column, endRow = cell.Row, endCol = cell.Column + 1;
                        while (mergedCells.ContainsKey(ExcelCell.GetCellID(Destination.Worksheet.SheetID, endRow, endCol)))
                        {
                            ExcelCell next = mergedCells[ExcelCell.GetCellID(Destination.Worksheet.SheetID, endRow, endCol)];
                            if (cell.MergeId != next.MergeId)
                            {
                                break;
                            }
                            endCol++;
                        }

                        while (IsMerged(mergedCells, Destination.Worksheet, endRow, startCol, endCol - 1, cell))
                        {
                            endRow++;
                        }

                        mergedAddresses.Add(new ExcelAddressBase(startRow, startCol, endRow - 1, endCol - 1));
                    }
                }
                Destination.Worksheet.MergedCells.List.AddRange((from r in mergedAddresses select r.Address));
            }
		}

		private bool IsAdded(ExcelCell cell, List<ExcelAddressBase> mergedAddresses)
		{
            foreach (var address in mergedAddresses)
            {
                if (address.Collide(new ExcelAddressBase(cell.CellAddress)) == eAddressCollition.Inside)
                {
                    return true;
                }
            }
            return false;
		}

		private bool IsMerged(Dictionary<ulong, ExcelCell> mergedCells, ExcelWorksheet worksheet, int row, int startCol, int endCol, ExcelCell cell)
		{
            for (int col = startCol; col <= endCol; col++)
            {
                if (!mergedCells.ContainsKey(ExcelCell.GetCellID(worksheet.SheetID, row, col)))
                {
                    return false;
                }
                else
                {
                    ExcelCell next = mergedCells[ExcelCell.GetCellID(worksheet.SheetID, row, col)];
                    if (cell.MergeId != next.MergeId)
                    {
                        return false;
                    }
                }
            }
            return true;
		}

		/// <summary>
		/// Clear all cells
		/// </summary>
		public void Clear()
		{
			Delete(this);
		}
		/// <summary>
		/// Creates an array-formula.
		/// </summary>
		/// <param name="ArrayFormula">The formula</param>
		public void CreateArrayFormula(string ArrayFormula)
		{
			if (Addresses != null)
			{
				throw (new Exception("An Arrayformula can not have more than one address"));
			}
			Set_SharedFormula(ArrayFormula, this, true);
		}
		private void Delete(ExcelAddressBase Range)
		{
            DeleteCheckMergedCells(Range);
			//First find the start cell
            ulong startID = GetCellID(_worksheet.SheetID, Range._fromRow, Range._fromCol);
			int index = _worksheet._cells.IndexOf(startID);
			if (index < 0)
			{
				index = ~index;
			}
			ExcelCell cell;
			//int row=cell.Row, col=cell.Column;
			//Remove all cells in the range
			while (index < _worksheet._cells.Count)
			{
				cell = _worksheet._cells[index] as ExcelCell;
				if (cell.Row > Range._toRow || cell.Row == Range._toRow && cell.Column > Range._toCol)
				{
					break;
				}
				else
				{
					if (cell.Column >= Range._fromCol && cell.Column <= Range._toCol)
					{
						_worksheet._cells.Delete(cell.CellID);
					}
					else
					{
						index++;
					}
				}
			}

			//Delete multi addresses as well
			if (Addresses != null)
			{
				foreach (var sub in Addresses)
				{
					Delete(sub);
				}
            }
        }

        private void DeleteCheckMergedCells(ExcelAddressBase Range)
        {
            var removeItems = new List<string>();
            foreach (var addr in Worksheet.MergedCells)
            {
                var addrCol = Range.Collide(new ExcelAddress(Range.WorkSheet, addr));
                if (addrCol != eAddressCollition.No)
                {
                    if (addrCol == eAddressCollition.Inside)
                    {
                        removeItems.Add(addr);
                    }
                    else
                    {
                        throw (new InvalidOperationException("Can't remove/overwrite cells that are merged"));
                    }
                }
            }
            foreach (var item in removeItems)
            {
                Worksheet.MergedCells.Remove(item);
			}
		}
		#endregion
		#region IDisposable Members

		public void Dispose()
		{
			//_worksheet = null;
		}

		#endregion
		#region "Enumerator"
		int _index;
		ulong _toCellId;
		int _enumAddressIx;
		public IEnumerator<ExcelRangeBase> GetEnumerator()
		{
			Reset();
			return this;
		}

		IEnumerator IEnumerable.GetEnumerator()
		{
			Reset();
			return this;
		}

		/// <summary>
		/// The current range when enumerating
		/// </summary>
		public ExcelRangeBase Current
		{
			get
			{
				return new ExcelRangeBase(_worksheet, (_worksheet._cells[_index] as ExcelCell).CellAddress);
			}
		}

		/// <summary>
		/// The current range when enumerating
		/// </summary>
		object IEnumerator.Current
		{
			get
			{
				return ((object)(new ExcelRangeBase(_worksheet, (_worksheet._cells[_index] as ExcelCell).CellAddress)));
			}
		}

		public bool MoveNext()
		{
			_index++;
			if (_enumAddressIx == -1)
			{
				GetNextIndexEnum(_fromRow, _fromCol, _toRow, _toCol);

				if (_index >= _worksheet._cells.Count || _worksheet._cells[_index].RangeID > _toCellId)
				{
					if (Addresses == null)
					{
						return false;
					}
					else
					{
						_enumAddressIx++;
						GetStartIndexEnum(Addresses[0].Start.Row, Addresses[0].Start.Column, Addresses[0].End.Row, Addresses[0].End.Column);
						return MoveNext();
					}
				}

			}
			else
			{
				GetNextIndexEnum(Addresses[_enumAddressIx].Start.Row, Addresses[_enumAddressIx].Start.Column, Addresses[_enumAddressIx].End.Row, Addresses[_enumAddressIx].End.Column);
				if (_index >= _worksheet._cells.Count || _worksheet._cells[_index].RangeID > _toCellId)
				{
					if (++_enumAddressIx < Addresses.Count)
					{
						GetStartIndexEnum(Addresses[_enumAddressIx].Start.Row, Addresses[_enumAddressIx].Start.Column, Addresses[_enumAddressIx].End.Row, Addresses[_enumAddressIx].End.Column);
						MoveNext();
					}
					else
					{
						return false;
					}
				}
			}
			return true;
		}

		public void Reset()
		{
			_enumAddressIx = -1;
			GetStartIndexEnum(_fromRow, _fromCol, _toRow, _toCol);
		}

		private void GetNextIndexEnum(int fromRow, int fromCol, int toRow, int toCol)
		{
			if (_index >= _worksheet._cells.Count) return;
			ExcelCell cell = _worksheet._cells[_index] as ExcelCell;
			while (cell.Column > toCol || cell.Column < fromCol)
			{
				if (cell.Column < fromCol)
				{
					_index = _worksheet._cells.IndexOf(ExcelAddress.GetCellID(_worksheet.SheetID, cell.Row, fromCol));
				}
				else
				{
					_index = _worksheet._cells.IndexOf(ExcelAddress.GetCellID(_worksheet.SheetID, cell.Row + 1, fromCol));
				}

				if (_index < 0)
				{
					_index = ~_index;
				}
				if (_index >= _worksheet._cells.Count || _worksheet._cells[_index].RangeID > _toCellId)
				{
					break;
				}
				cell = _worksheet._cells[_index] as ExcelCell;
			}
		}

		private void GetStartIndexEnum(int fromRow, int fromCol, int toRow, int toCol)
		{
			_index = _worksheet._cells.IndexOf(ExcelCellBase.GetCellID(_worksheet.SheetID, fromRow, fromCol));
			_toCellId = ExcelCellBase.GetCellID(_worksheet.SheetID, toRow, toCol);
			if (_index < 0)
			{
				_index = ~_index;
			}
			_index--;
		}
    #endregion
    }
}