在c＃wpf应用程序上删除Tobit电子邮件（eml）

Question

我有一个关于在wpf应用程序上删除电子邮件（eml文件）的问题。 我的问题是我的应用程序存储了eml文件，但如果我打开它，我的Tobit电子邮件客户端会显示一个空邮件。放下桌面并打开它完美无缺。正如图像或文本文件等其他文件也在起作用。

感谢您的帮助。

这是我的代码：

private void listViewDocumentsSA_Drop(object sender, DragEventArgs e)...

        string[] format = e.Data.GetFormats();

        System.Windows.DataObject obj = (System.Windows.DataObject)e.Data;

        Object item = (object)e.Data.GetData(typeof(System.String));            

        try
        {

            string[] fileNames = null;
            string dir = System.Configuration.ConfigurationSettings.AppSettings["dir"];

            if (!Directory.Exists(dir))
                Directory.CreateDirectory(dir);

            string filename = "";


            if (e.Data is System.Windows.DataObject && ((System.Windows.DataObject)e.Data).ContainsFileDropList())
            {
                foreach (string filePath in ((System.Windows.DataObject)e.Data).GetFileDropList())
                {
                    filename = dir + "test" + "$" + System.DateTime.Now.Ticks.ToString() + "$" + System.IO.Path.GetFileName(filePath);
                    filename = filename.Replace("\\\\", "\\");

                    File.Copy(filePath, filename, false);
                }

            }


            if (e.Data.GetDataPresent("FileGroupDescriptor"))
            {

                Stream theStream = (Stream)e.Data.GetData("FileGroupDescriptor");
                byte[] fileGroupDescriptor = new byte[512];
                theStream.Read(fileGroupDescriptor, 0, 512);

                StringBuilder fileName = new StringBuilder("");

                for (int i = 76; fileGroupDescriptor[i] != 0; i++)
                {
                    fileName.Append(Convert.ToChar(fileGroupDescriptor[i]));
                }
                theStream.Close();

                string path = dir + "test" + "$" + System.DateTime.Now.Ticks.ToString() + "$";
                path = path.Replace("\\\\", "\\");

                string theFile = path + fileName.ToString();


                if (e.Data.GetDataPresent("FileContents", false))
                {


                    string[] formats = e.Data.GetFormats();

                    MemoryStream ms = e.Data.GetData("FileGroupDescriptorW") as MemoryStream;

                    byte[] fileBytes = new byte[ms.Length];

                    ms.Position = 0;
                    ms.Read(fileBytes, 0, (int)ms.Length);


                    FileStream fs = new FileStream(theFile, FileMode.Create);
                    fs.Write(fileBytes, 0, (int)fileBytes.Length);

                    fs.Close();
                }
                else
                    throw new System.Exception("...");
            }
        }
        catch (Exception ex)
        {
            System.Windows.Forms.MessageBox.Show(ex.Message);
        }