电子邮件中的附件以UTF-8编码保存

有没有人有一个例子，能够发送附件保存为utf8编码的附件的电子邮件。我试过，但是当我在记事本中打开它说编码是ascii。注意：我不想先保存文件。电子邮件中的附件以UTF-8编码保存

// Init the smtp client and set the network credentials 
      SmtpClient smtpClient = new SmtpClient(); 
      smtpClient.Host = getParameters("MailBoxHost"); 

      // Create MailMessage 
      MailMessage message = new MailMessage("[email protected]",toAddress,subject, body); 

      using (MemoryStream memoryStream = new MemoryStream()) 
      { 
       byte[] contentAsBytes = Encoding.UTF8.GetBytes(attachment); 
       memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length); 

       // Set the position to the beginning of the stream. 
       memoryStream.Seek(0, SeekOrigin.Begin); 

       // Create attachment 
       ContentType contentType = new ContentType(); 
       contentType.Name = attachementname; 
       contentType.CharSet = "UTF-8"; 

       System.Text.Encoding inputEnc = System.Text.Encoding.UTF8; 

       Attachment attFile = new Attachment(memoryStream, contentType); 

       // Add the attachment 
       message.Attachments.Add(attFile); 

       // Send Mail via SmtpClient 
       smtpClient.Send(message); 


      }

来源

2012-07-02 Gazza T

为UTF-8添加BOM (byte order mark)在流的开头：

0xEF,0xBB,0xBF

代码：

byte[] bom = { 0xEF, 0xBB, 0xBF }; 
memoryStream.Write(bom, 0, bom.Length); 

byte[] contentAsBytes = Encoding.UTF8.GetBytes(attachment); 
memoryStream.Write(contentAsBytes, 0, contentAsBytes.Length);

来源

2012-07-02 23:29:24 Guffa

假设你的附件是文本，则ContentType类的默认构造函数会将附件的Content-Type标题设置为application/octet-stream，但它需要设置为text/plain，例如：

ContentType contentType = new ContentType(MediaTypeNames.Text.Plain);

或者：

ContentType contentType = new ContentType(); 
contentType.MediaType = MediaTypeNames.Text.Plain;

此外，您应该指定附件一TransferEncoding，为UTF-8是不是7位干净（其中许多电子邮件系统仍然需要），例如：

attFile.TransferEncoding = TransferEncoding.QuotedPrintable;

或者：

attFile.TransferEncoding = TransferEncoding.Base64;

来源

2012-07-02 23:33:07

电子邮件中的附件以UTF-8编码保存

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