如何捕获电子邮件

Question

我已经在 Outlook 中创建了一个基本的自定义任务窗格。

我想将邮件拖放到任务窗格中。当拖放时，它应该允许我捕获邮件作为对象，从而可以对其进行处理，例如保存到 SharePoint 位置。

这可能吗？如果可以，有什么提示？

我正在使用 VS2013 C# .NET 4.0，Add-in 是针对 Outlook 2010/2013 的。

- oshirowanen

---

“对它进行操作”是什么意思？仅通过访问邮件消息作为原始.msg文件（文件名和内容为原始字节）就足够了吗？ - Dávid Molnár

Answer 1

前提和设置

• Windows 10专业版
• 带有Office开发的Visual Studio 2013终极版
• Outlook 2013与一个电子邮件账户

项目

• In Visual Studio select New Project -> Visual C# -> Office/SharePoint -> Office Add-ins -> Outlook 2013 Add-in
• Right click on the project -> Add -> User Control

• Open "ThisAddIn.cs" and add the following code to the "ThisAddIn_Startup" method:

  var myCustomPane= this.CustomTaskPanes.Add(new UserControl1(), "My Pane");
  myCustomPane.Visible = true;
  

拖放邮件

• Double click UserControl1 in the Solution Explorer. This opens the designer window.

• In Properties set AllowDrop = True and hook up two event handlers DragDrop and DragEnter.

  private void UserControl1_DragEnter(object sender, DragEventArgs e)
  {
      // if you want to read the message data as a string use this:
      if (e.Data.GetDataPresent(DataFormats.UnicodeText))
      {
          e.Effect = DragDropEffects.Copy;
      }
      // if you want to read the whole .msg file use this:
      if (e.Data.GetDataPresent("FileGroupDescriptorW") && 
          e.Data.GetDataPresent("FileContents"))
      {
          e.Effect = DragDropEffects.Copy;
      }
  }
  
  private void UserControl1_DragDrop(object sender, DragEventArgs e)
  {
      // to read basic info about the mail use this:
      var text = e.Data.GetData(DataFormats.UnicodeText).ToString();
      var message = text.Split(new string[] { "\r\n" }, StringSplitOptions.None)[1];
      var parts = message.Split('\t');
      var from = parts[0]; // Email From
      var subject = parts[1]; // Email Subject
      var time = parts[2]; // Email Time
  
      // to get the .msg file contents use this:
      // credits to "George Vovos", https://dev59.com/KVcP5IYBdhLWcg3w-Otz#43577490
      var outlookFile = e.Data.GetData("FileGroupDescriptor", true) as MemoryStream;
      if (outlookFile != null)
      {
          var dataObject = new iwantedue.Windows.Forms.OutlookDataObject(e.Data);
  
          var filenames = (string[])dataObject.GetData("FileGroupDescriptorW");
          var filestreams = (MemoryStream[])dataObject.GetData("FileContents");
  
          for (int fileIndex = 0; fileIndex < filenames.Length; fileIndex++)
          {
              string filename = filenames[fileIndex];
              MemoryStream filestream = filestreams[fileIndex];
  
              // do whatever you want with filestream, e.g. save to a file:
              string path = Path.GetTempPath() + filename;
              using (var outputStream = File.Create(path))
              {
                  filestream.WriteTo(outputStream);
              }
          }
      }
  }
  

你可以从CodeProject获取 "iwantedue.Windows.Forms.OutlookDataObject"，或者使用这个GitHub gist。

演示

- Dávid Molnár

---

应该归功于David Ewen :)。我们的答案基本上是他在代码项目上的工作。我以前使用过它，没有任何问题，不知道OP是否真的有任何问题... - George Vovos

Answer 2

您可以通过检查Explorer类的Selection属性来获取已删除的项目或多个项目（如果允许）。 在以下文章中了解更多信息：

• {{link2：如何：获取拖放到.NET表单上的Outlook电子邮件项目的属性}}
• {{link3：Outlook，自定义任务窗格和拖放问题}}

- Eugene Astafiev

Answer 3

尝试使用类似这样的代码。

        public static string[] GetDropedFiles(DragEventArgs e)
        {
            string[] files = null;
            var outlookFile = e.Data.GetData("FileGroupDescriptor", true) as MemoryStream;
            if (outlookFile != null)
            {
                OutlookEmailObject dataObject = new OutlookEmailObject(e.Data);

                var filenames = (string[])dataObject.GetData("FileGroupDescriptorW");
                var filestreams = (MemoryStream[])dataObject.GetData("FileContents");

                files = new string[filenames.Length];
                for (int fileIndex = 0; fileIndex < filenames.Length; fileIndex++)
                {
                    string filename = filenames[fileIndex];
                    MemoryStream filestream = filestreams[fileIndex];

                    string path = Path.GetTempPath();
                    string fullFileName = path + filename;

                    FileStream outputStream = File.Create(fullFileName);
                    filestream.WriteTo(outputStream);
                    outputStream.Close();

                    files[fileIndex] = fullFileName;
                }
            }
            else
                files = (string[])e.Data.GetData(DataFormats.FileDrop);

            return files;
        }

您可以在此处获取OutlookEmailObject类（下载代码示例）：
http://www.codeproject.com/Articles/28209/Outlook-Drag-and-Drop-in-C

（当然，在完成操作后，您应该删除所有临时文件）

- George Vovos