C# 实现的 MIME 解/编码

• 下载源代码文件 - 45.23 KB

引言

几天前，当我需要一个 MIME 库来编码/解码 C# 中的一些 MIME 类型消息时，我没有找到任何合适的类。我找到的唯一的是 C++ 实现，作者是 nickadams。我阅读了他的代码，然后将其翻译成 C# 代码。它对我来说工作得很好。

如何使用

它的使用就像 nickadams 的代码一样简单：) 这是示例

编码消息

   MimeMessage mail = new MimeMessage();
   mail.SetDate();
   mail.Setversion();
   mail.SetFrom("sender@local.com",null);
   mail.SetTo("recipient1@server1.com, 
      Nick Name <recipient2@server1.com>, 
      \"Nick Name\" <recipient3@server2.com>");
   mail.SetCC("recipient4@server4.com",null);
   mail.SetSubject("test mail",null);
   mail.SetFieldValue("X-Priority", "3 (Normal)", null);

   // Initialize header
   mail.SetContentType("multipart/mixed");
   // generate a boundary string automatically
   // if the parameter is NULL
   mail.SetBoundary(null);
   // Add a text body part
   // default Content-Type is "text/plain"
   // default Content-Transfer-Encoding is "7bit"
   MimeBody mBody = mail.CreatePart();
   mBody.SetText("Hi, there");  // set the content of the body part

   // Add a file attachment body part
   mBody = mail.CreatePart();
   mBody.SetDescription("enclosed photo",null);
   mBody.SetTransferEncoding("base64");
   // if Content-Type is not specified, it'll be
   // set to "image/jpeg" by ReadFromFile()
   mBody.ReadFromFile(".\\00.jpg"); 

   // Generate a simple message
   MimeMessage mail2 = new MimeMessage();
   mail2.SetFrom("abc@abc.com",null);
   mail2.SetTo("abc@abc.com",null);
   mail2.SetSubject("This is an attached message",null);
   mail2.SetText("Content of attached message.\r\n");

   // Attach the message
   mBody = mail.CreatePart();
   mBody.SetDescription("enclosed message",null);
   mBody.SetTransferEncoding("7bit");
   // if Content-Type is not specified, it'll be
   // set to "message/rfc822" by SetMessage()
   mBody.SetMessage(mail2); 

   // Add an embedded multipart
   mBody = mail.CreatePart();
   mBody.SetContentType("multipart/alternative");
   mBody.SetBoundary("embeded_multipart_boundary");
   MimeBody mBodyChild = mBody.CreatePart();
   mBodyChild.SetText("Content of Part 1\r\n");
   mBodyChild = mBody.CreatePart();
   mBodyChild.SetText("Content of Part 2\r\n");

   //store content to a string buffer
   StringBuilder sb = new StringBuilder();
   mail.StoreBody(sb);

解码消息

   StreamReader sr = new StreamReader(".\\aaa.txt");
   string message = sr.ReadToEnd();
   MimeMessage aMimeMessage = new MimeMessage();
   aMimeMessage.LoadBody(message);
   ArrayList bodylist = new ArrayList();
   aMimeMessage.GetBodyPartList(bodylist);
   for(int i=0;i<bodylist.Count;i++)
   {
    MimeBody ab = (MimeBody) bodylist[i];
    if(ab.IsText())
    {
     string m = ab.GetText();
     System.Windows.Forms.MessageBox.Show(m);
    }
    else if(ab.IsAttachment())
    {
     ab.WriteToFile("new"+ab.GetName());
    }
   }

最后...

非常感谢 nickadams。你的出色工作对我的帮助很大。

历史

• 2005 年 8 月 21 日：初始发布