如何捕获电子邮件

Question

我在Outlook中创建了一个基本的自定义任务窗格。

我想拖动一封电子邮件并将其放入任务窗格。当被删除时，它应该允许我将电子邮件捕获为一个对象我猜，允许我用它做一些事情，例如保存到共享点位置。

这可能吗？如果是这样，任何指针？

我使用的是VS2013 C＃.NET 4.0，加载项适用于Outlook 2010/2013。

Answer 1

先决条件和设置

• Windows 10 Pro
• 带Office开发的Visual Studio 2013 Ultimate
• 带有电子邮件帐户的Outlook 2013

项目

• 在Visual Studio中选择New Project - ＆gt; Visual C＃ - ＆gt; Office / SharePoint - ＆gt; Office加载项 - ＆gt; Outlook 2013加载项
• 右键点击该项目 - ＆gt;添加 - ＆gt;用户控制

• 打开＆＃34; ThisAddIn.cs＆＃34;并将以下代码添加到＆＃34; ThisAddIn_Startup＆＃34;方法：

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

拖放消息

• 在解决方案资源管理器中双击UserControl1。这将打开设计器窗口。

• 在属性设置 AllowDrop = True 并连接两个事件处理程序 DragDrop 和 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", http://stackoverflow.com/a/43577490/1093508
      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);
              }
          }
      }
  }
  

您可以从CodeProject获取＆＃34; iwantedue.Windows.Forms.OutlookDataObject＆＃34; ，也可以使用此GitHub gist。

演示

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）。请阅读以下文章中的更多相关内容：

• HowTo: Get properties of an Outlook email item drag-and-dropped onto a .NET form
• Outlook, custom task pane and drag-drop problem

Answer 3

尝试这样的事情

        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

（当然你应该在完成之后删除所有临时文件）