Changeset 16945 for trunk/HeuristicLab.Persistence

Timestamp:

05/11/19 14:38:47 (6 years ago)

Author:

jkarder

Message:

#2520: changed deserialization in PersistenceContentManager

• added method to check if old persistence can open a file
• used this method to determine which persistence to use

File:

• trunk/HeuristicLab.Persistence/3.3/Default/Xml/XmlParser.cs (modified) (1 diff)

trunk/HeuristicLab.Persistence/3.3/Default/Xml/XmlParser.cs

@@ -288 +288 @@
       }
     }
+
+    /// <summary>
+    /// Checks if the given file can be opened as <see cref="ZipArchive" />.
+    /// </summary>
+    /// <param name="filename">The filename.</param>
+    /// <returns><see langword="true" /> if the file can be opened as <see cref="ZipArchive" />; otherwise, <see langword="false" />.</returns>
+    public static bool CanOpen(string filename) {
+      try {
+        using (FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read)) {
+          using (ZipArchive zip = new ZipArchive(fs)) {
+            return true;
+          }
+        }
+      } catch (InvalidDataException) {
+        return false;
+      }
+    }
   }
 }