コード例 #1
0
ファイル: ConfigManager.cs プロジェクト: Anubi85/Zeus
 /// <summary>
 /// Save given data to configuration file.
 /// </summary>
 /// <typeparam name="T">The type of the data that has to be saved.</typeparam>
 /// <param name="sectionData">The data that has to be saved in the configuration file.</param>
 public static void SaveSection <T>(T sectionData) where T : class
 {
     s_CfgMutex.WaitOne();
     foreach (IConfigSource source in s_Sources.Where(s => !s.IsReadOnly))
     {
         XmlSerializer xs = new XmlSerializer(typeof(T));
         //use a memory stream to holt temporary output in order to be able to modify sections in the middle of the file.
         using (MemoryStream ms = new MemoryStream())
         {
             Stream dataStream = source.Open();
             using (XmlReader xr = XmlReader.Create(dataStream, s_ReaderSettings))
             {
                 using (XmlWriter xw = XmlWriter.Create(ms, s_WriterSettings))
                 {
                     //states need to be maually changed otherwise XmlSerializer try to write start document node
                     //that for Fragment xml throw an exception.
                     xw.FakeWrite();
                     //flag to indicate if the section already exists
                     bool dataWritten = false;
                     xr.MoveToContent();
                     //check if file is empty
                     if (xr.NodeType != XmlNodeType.None)
                     {
                         //loop over all available sections
                         while (xr.NodeType == XmlNodeType.Element)
                         {
                             if (xr.Name != GetSectionName <T>())
                             {
                                 //if not requested section copy it to output
                                 xw.WriteNode(xr.ReadSubtree(), false);
                             }
                             else
                             {
                                 xs.Serialize(xw, sectionData, new XmlSerializerNamespaces(new[] { XmlQualifiedName.Empty }));
                                 dataWritten = true;
                             }
                             //move to next section
                             xr.Skip();
                         }
                     }
                     if (!dataWritten)
                     {
                         //section has not been found, create it
                         xs.Serialize(xw, sectionData, new XmlSerializerNamespaces(new[] { XmlQualifiedName.Empty }));
                     }
                 }
             }
             //update the settings file with the data stored in the temporary memory stream
             dataStream.Seek(0, SeekOrigin.Begin);
             dataStream.SetLength(0);
             dataStream.Write(ms.GetBuffer(), 0, (int)ms.Length);
             source.Close();
         }
     }
     s_CfgMutex.ReleaseMutex();
 }