1 | using System;
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2 |
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3 | namespace ToolBox.Formatting {
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4 | public class TextFormatter {
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5 | // ------------------------------------------------------------------
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6 | /// <summary>
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7 | /// Returns a string that's formatted using the specified format for
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8 | /// the number specified.
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9 | /// </summary>
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10 | /// <param name="format">TextFormat</param>
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11 | /// <param name="number">double</param>
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12 | /// <param name="significantDigits">int</param>
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13 | /// <returns>string</returns>
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14 | // ------------------------------------------------------------------
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15 | public static string Format(
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16 | TextFormat format,
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17 | double number,
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18 | int significantDigits) {
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19 | return Format(format, number.ToString(), significantDigits);
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20 | }
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21 |
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22 | // ------------------------------------------------------------------
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23 | /// <summary>
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24 | /// Returns a string that's formatted using the specified format for
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25 | /// the text specified. If a format other than 'String' is specified,
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26 | /// the text is first converted to a double, then the resultant string
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27 | /// that represents the number in the specified format is returned. If
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28 | /// the conversion from the text to a double fails, no exception is
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29 | /// thrown. The supplied text is simply returned.
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30 | /// </summary>
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31 | /// <param name="format">TextFormat</param>
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32 | /// <param name="text">string</param>
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33 | /// <param name="significantDigits">int</param>
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34 | /// <returns>string</returns>
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35 | // ------------------------------------------------------------------
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36 | public static string Format(
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37 | TextFormat format,
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38 | string text,
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39 | int significantDigits) {
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40 | double myNumber = double.MaxValue;
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41 | string result = "";
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42 |
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43 | // Only if the format specified isn't a string,
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44 | // then try to convert the text to a number. If the
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45 | // conversion fails, just return the text.
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46 | if (format != TextFormat.String) {
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47 | try {
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48 | myNumber = double.Parse(text);
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49 | }
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50 | catch {
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51 | return text;
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52 | }
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53 | }
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54 |
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55 | // Used for the number of sig digs. For one sig dig, this
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56 | // will be #.#. For two sig digs, it'll be #.##.
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57 | string sigDigIdentifier = "#";
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58 |
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59 | if (significantDigits > 0) {
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60 | sigDigIdentifier = "#.";
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61 | for (int i = 0; i < significantDigits; i++) {
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62 | sigDigIdentifier += "#";
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63 | }
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64 | }
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65 | switch (format) {
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66 | case TextFormat.String:
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67 | result = text;
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68 | break;
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69 |
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70 | case TextFormat.Currency:
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71 | result = String.Format("{0:c}", myNumber);
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72 | break;
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73 |
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74 | case TextFormat.Decimal:
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75 | result = String.Format("{0:d}", (int)myNumber);
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76 | break;
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77 |
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78 | case TextFormat.FixedPoint:
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79 | result = String.Format("{0:f}", myNumber);
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80 | break;
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81 |
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82 | case TextFormat.General:
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83 | result = String.Format("{0:g}", myNumber);
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84 | break;
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85 |
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86 | case TextFormat.Hexadecimal:
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87 | result = String.Format("{0:x}", (int)myNumber);
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88 | break;
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89 |
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90 | case TextFormat.Number:
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91 | //result = String.Format("{0:n}", myNumber);
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92 | result = myNumber.ToString(sigDigIdentifier);
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93 | break;
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94 |
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95 | case TextFormat.Percentage:
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96 | result = String.Format("{0:p}", myNumber);
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97 | break;
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98 |
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99 | case TextFormat.RoundTrip:
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100 | result = String.Format("{0:r}", myNumber);
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101 | break;
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102 |
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103 | case TextFormat.ScientificNotation:
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104 | //result = String.Format("{0:e}", myNumber);
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105 | result = myNumber.ToString(sigDigIdentifier + "E+0");
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106 | break;
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107 |
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108 | default: result = text;
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109 | break;
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110 | }
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111 | return result;
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112 | }
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113 | }
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114 | }
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