[gears-eng] Drag and Drop parsing Outlook attachment

[David]

With Google Gears, when a file is drag and drop, we can access the
file name and its content, which is good.  It will be awesome if the
drag and drop supports parsing an Outlook attachment with get the file
name and file content from the FileGroupDescriptor, which is similar
to what .Net Windows Form supports:


private void Form1_DragDrop(object sender,
         System.Windows.Forms.DragEventArgs e)
    {
      string [] fileNames = null;

      try
      {
        if ( e.Data.GetDataPresent(DataFormats.FileDrop,false) ==
true)
        {
          fileNames = (string []) e.Data.GetData
(DataFormats.FileDrop);
          // handle each file passed as needed
          foreach( string fileName in fileNames)
          {
            // do what you are going to do with each filename
          }
        }
        else if (e.Data.GetDataPresent("FileGroupDescriptor"))
        {
          //
          // the first step here is to get the filename
          // of the attachment and
          // build a full-path name so we can store it
          // in the temporary folder
          //

          // set up to obtain the FileGroupDescriptor
          // and extract the file name
          Stream theStream = (Stream) e.Data.GetData
("FileGroupDescriptor");
          byte [] fileGroupDescriptor = new byte[512];
          theStream.Read(fileGroupDescriptor,0,512);
          // used to build the filename from the FileGroupDescriptor
block
          StringBuilder fileName = new StringBuilder("");
          // this trick gets the filename of the passed attached file
          for(int i=76; fileGroupDescriptor[i]!=0; i++)
          {  fileName.Append(Convert.ToChar(fileGroupDescriptor[i]));}
          theStream.Close();
          string path = Path.GetTempPath();
              // put the zip file into the temp directory
          string theFile = path+fileName.ToString();
              // create the full-path name

          //
          // Second step:  we have the file name.
          // Now we need to get the actual raw
          // data for the attached file and copy it to disk so we work
on it.
          //

          // get the actual raw file into memory
          MemoryStream ms = (MemoryStream) e.Data.GetData(
              "FileContents",true);
          // allocate enough bytes to hold the raw data
          byte [] fileBytes = new byte[ms.Length];
          // set starting position at first byte and read in the raw
data
          ms.Position = 0;
          ms.Read(fileBytes,0,(int)ms.Length);
          // create a file and save the raw zip file to it
          FileStream fs = new FileStream(theFile,FileMode.Create);
          fs.Write(fileBytes,0,(int)fileBytes.Length);

          fs.Close();  // close the file

          FileInfo tempFile = new FileInfo(theFile);

          // always good to make sure we actually created the file
          if ( tempFile.Exists == true)
          {
            // for now, just delete what we created
            tempFile.Delete();
          }
          else
          {  Trace.WriteLine("File was not created!");}
        }

      }
      catch (Exception ex)
      {
        Trace.WriteLine("Error in DragDrop function: " + ex.Message);

        // don't use MessageBox here - Outlook or Explorer is
waiting !
      }

    }



Thanks.