从 GroupWise 中的电子邮件文件附件拖放到 .NET 应用程序

发布于 2024-07-20 06:10:26 字数 583 浏览 3 评论 0原文

我试图允许将在 Novell GroupWise 中打开的电子邮件中的附件放入我的 C# WinForms 应用程序中。标准 .NET 功能不起作用。

在控件的 DragDrop 事件中，e.Data.GetFormats() 返回以下内容。

FileGroupDescriptorW
FileGroupDescriptor
FileContents
attachment format

我可以使用 e.Data.GetData("FileGroupDescriptor") 获取文件名并转到位置 76。

不幸的是，e.Data.GetData("FileContents") 会在 System.Windows.Forms.dll 中导致第一次出现 System.NotImplementedException ，并且返回空值。附件格式也返回 null。

我的搜索告诉我，拖放比我想象的要复杂得多:) GroupWise 似乎可能使用一种名为 CFSTR_FILECONTENTS 的格式，但这只是一个猜测。附件可以成功拖放到 Windows 桌面或其他文件夹中。

感谢您的任何建议。

原文

I'm trying to allow an attachment from an email open in Novell GroupWise to be dropped into my C# WinForms application. The standard .NET functionality doesn't work.

In the DragDrop event of a control, e.Data.GetFormats() returns the following.

FileGroupDescriptorW
FileGroupDescriptor
FileContents
attachment format

I can get the filename with e.Data.GetData("FileGroupDescriptor") and going to position 76.

Unfortunately, e.Data.GetData("FileContents") causes a first chance System.NotImplementedException in System.Windows.Forms.dll and returns null. Attachment format also returns null.

My searches tell me that drag and drop is a lot more complex than I thought :) It seems like GroupWise might be using a format called CFSTR_FILECONTENTS but that's just a guess. The attachments can be successfully dragged and dropped onto the Windows desktop or other folders.

Thanks for any suggestions.

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段念尘 2024-07-27 06:10:26

我也没有运气找到这个。这是我的想法（Groupwise 7）：

private void control_DragDrop(object sender, DragEventArgs e)
{
   string strFilename = null;

   //something about the act of reading this stream creates the file in your temp folder(?)
   using (MemoryStream stream = (MemoryStream)e.Data.GetData("attachment format", true))
   {
       byte[] b = new byte[stream.Length];
       stream.Read(b, 0, (int)stream.Length);
       strFilename = Encoding.Unicode.GetString(b);
       //The path/filename is at position 10.
       strFilename = strFilename.Substring(10, strFilename.IndexOf('\0', 10) - 10);
       stream.Close();
   }

   if (strFilename != null && File.Exists(strFilename))
   {
      //From here on out, you're just reading another file from the disk...
      using(FileStream fileIn = File.Open(strFilename, FileMode.Open))
      {
          //Do your thing
          fileIn.Close();
      }
   }

   File.Delete(strFilename);
}

I had no luck finding this too. Here is what I came up with (Groupwise 7):

private void control_DragDrop(object sender, DragEventArgs e)
{
   string strFilename = null;

   //something about the act of reading this stream creates the file in your temp folder(?)
   using (MemoryStream stream = (MemoryStream)e.Data.GetData("attachment format", true))
   {
       byte[] b = new byte[stream.Length];
       stream.Read(b, 0, (int)stream.Length);
       strFilename = Encoding.Unicode.GetString(b);
       //The path/filename is at position 10.
       strFilename = strFilename.Substring(10, strFilename.IndexOf('\0', 10) - 10);
       stream.Close();
   }

   if (strFilename != null && File.Exists(strFilename))
   {
      //From here on out, you're just reading another file from the disk...
      using(FileStream fileIn = File.Open(strFilename, FileMode.Open))
      {
          //Do your thing
          fileIn.Close();
      }
   }

   File.Delete(strFilename);
}

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