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c#邮件的代码

王朝学院·作者佚名  2009-12-02
窄屏简体版  字體: |||超大  

using System;

using System.Collections.Generic;

using System.Net.Sockets;

using System.IO;

using System.Text;

using System.Collections;

public class MailSender

{

/// <summary>

/// SMTP服务器域名

/// </summary>

public string Server

{

get { return server; }

set { if (value != server) server = value; }

} private string server = "";

/// <summary>

/// SMTP服务器端口 [默认为25]

/// </summary>

public int Port

{

get { return port; }

set { if (value != port) port = value; }

} private int port = 25;

/// <summary>

/// 用户名 [如果需要身份验证的话]

/// </summary>

public string UserName

{

get { return userName; }

set { if (value != userName) userName = value; }

} private string userName = "";

/// <summary>

/// 密码 [如果需要身份验证的话]

/// </summary>

public string Password

{

get { return password; }

set { if (value != password) password = value; }

} private string password = "";

/// <summary>

/// 发件人地址

/// </summary>

public string From

{

get { return from; }

set { if (value != from) from = value; }

} private string from = "";

/// <summary>

/// 收件人地址

/// </summary>

public string To

{

get { return to; }

set { if (value != to) to = value; }

} private string to = "";

/// <summary>

/// 发件人姓名

/// </summary>

public string FromName

{

get { return fromName; }

set { if (value != fromName) fromName = value; }

} private string fromName = "";

/// <summary>

/// 收件人姓名

/// </summary>

public string ToName

{

get { return toName; }

set { if (value != toName) toName = value; }

} private string toName = "";

/// <summary>

/// 邮件的主题

/// </summary>

public string Subject

{

get { return subject; }

set { if (value != subject) subject = value; }

} private string subject = "";

/// <summary>

/// 邮件正文

/// </summary>

public string Body

{

get { return body; }

set { if (value != body) body = value; }

} private string body = "";

/// <summary>

/// 超文本格式的邮件正文

/// </summary>

public string HtmlBody

{

get { return htmlBody; }

set { if (value != htmlBody) htmlBody = value; }

} private string htmlBody = "";

/// <summary>

/// 是否是html格式的邮件

/// </summary>

public bool IsHtml

{

get { return isHtml; }

set { if (value != isHtml) isHtml = value; }

} private bool isHtml = false;

/// <summary>

/// 语言编码 [默认为GB2312]

/// </summary>

public string LanguageEncoding

{

get { return languageEncoding; }

set { if (value != languageEncoding) languageEncoding = value; }

} private string languageEncoding = "GB2312";

/// <summary>

/// 邮件编码 [默认为8bit]

/// </summary>

public string MailEncoding

{

get { return encoding; }

set { if (value != encoding) encoding = value; }

} private string encoding = "8bit";

/// <summary>

/// 邮件优先级 [默认为3]

/// </summary>

public int Priority

{

get { return priority; }

set { if (value != priority) priority = value; }

} private int priority = 3;

/// <summary>

/// 附件 [AttachmentInfo]

/// </summary>

public IList Attachments

{

get { return attachments; }

// set { if (value != attachments) attachments = value; }

} private ArrayList attachments = new ArrayList();

/// <summary>

/// 发送邮件

/// </summary>

public void SendMail()

{

// 创建TcpClient对象, 并建立连接

TcpClient tcp = null;

try

{

tcp = new TcpClient(server, port);

}

catch (Exception ex)

{

string err = ex.Message;

throw new Exception("无法连接服务器");

}

ReadString(tcp.GetStream());//获取连接信息

// 开始进行服务器认证

// 如果状态码是250则表示操作成功

if (!Command(tcp.GetStream(), "EHLO Localhost", "250"))

throw new Exception("登陆阶段失败");

if (userName != "")

{

// 需要身份验证

if (!Command(tcp.GetStream(), "AUTH LOGIN", "334"))

throw new Exception("身份验证阶段失败");

string nameB64 = ToBase64(userName); // 此处将username转换为Base64码

if (!Command(tcp.GetStream(), nameB64, "334"))

throw new Exception("身份验证阶段失败");

string passB64 = ToBase64(password); // 此处将password转换为Base64码

if (!Command(tcp.GetStream(), passB64, "235"))

throw new Exception("身份验证阶段失败");

}

// 准备发送

WriteString(tcp.GetStream(), "mail From: " + from);

WriteString(tcp.GetStream(), "rcpt to: " + to);

WriteString(tcp.GetStream(), "data");

// 发送邮件头

WriteString(tcp.GetStream(), "Date: " + DateTime.Now); // 时间

WriteString(tcp.GetStream(), "From: " + fromName + "<" + from + ">"); // 发件人

WriteString(tcp.GetStream(), "Subject: " + subject); // 主题

WriteString(tcp.GetStream(), "To:" + toName + "<" + to + ">"); // 收件人

//邮件格式

WriteString(tcp.GetStream(), "Content-Type: multipart/mixed; boundary=\"unique-boundary-1\"");

WriteString(tcp.GetStream(), "Reply-To:" + from); // 回复地址

WriteString(tcp.GetStream(), "X-Priority:" + priority); // 优先级

WriteString(tcp.GetStream(), "MIME-Version:1.0"); // MIME版本

// 数据ID,随意

// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "@security.com");

WriteString(tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); // 内容编码

WriteString(tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender"); // 邮件发送者

WriteString(tcp.GetStream(), "");

WriteString(tcp.GetStream(), ToBase64("This is a multi-part message in MIME format."));

WriteString(tcp.GetStream(), "");

// 从此处开始进行分隔输入

WriteString(tcp.GetStream(), "--unique-boundary-1");

// 在此处定义第二个分隔符

WriteString(tcp.GetStream(), "Content-Type: multipart/alternative;Boundary=\"unique-boundary-2\"");

WriteString(tcp.GetStream(), "");

if (!isHtml)

{

// 文本信息

WriteString(tcp.GetStream(), "--unique-boundary-2");

WriteString(tcp.GetStream(), "Content-Type: text/plain;charset=" + languageEncoding);

WriteString(tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);

WriteString(tcp.GetStream(), "");

WriteString(tcp.GetStream(), body);

WriteString(tcp.GetStream(), "");//一个部分写完之后就写如空信息,分段

WriteString(tcp.GetStream(), "--unique-boundary-2--");//分隔符的结束符号,尾巴后面多了--

WriteString(tcp.GetStream(), "");

}

else

{

//html信息

WriteString(tcp.GetStream(), "--unique-boundary-2");

WriteString(tcp.GetStream(), "Content-Type: text/html;charset=" + languageEncoding);

WriteString(tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);

WriteString(tcp.GetStream(), "");

WriteString(tcp.GetStream(), htmlBody);

WriteString(tcp.GetStream(), "");

WriteString(tcp.GetStream(), "--unique-boundary-2--");//分隔符的结束符号,尾巴后面多了--

WriteString(tcp.GetStream(), "");

}

// 发送附件

// 对文件列表做循环

for (int i = 0; i < attachments.Count; i++)

{

WriteString(tcp.GetStream(), "--unique-boundary-1"); // 邮件内容分隔符

WriteString(tcp.GetStream(), "Content-Type: application/octet-stream;name=\"" + ((AttachmentInfo)attachments[i]).FileName + "\""); // 文件格式

WriteString(tcp.GetStream(), "Content-Transfer-Encoding: base64"); // 内容的编码

WriteString(tcp.GetStream(), "Content-Disposition:attachment;filename=\"" + ((AttachmentInfo)attachments[i]).FileName + "\""); // 文件名

WriteString(tcp.GetStream(), "");

WriteString(tcp.GetStream(), ((AttachmentInfo)attachments[i]).Bytes); // 写入文件的内容

WriteString(tcp.GetStream(), "");

}

Command(tcp.GetStream(), ".", "250"); // 最后写完了,输入"."

// 关闭连接

tcp.Close();

}

/// <summary>

/// 向流中写入字符

/// </summary>

/// <param name="netStream">来自TcpClient的流</param>

/// <param name="str">写入的字符</param>

protected void WriteString(NetworkStream netStream, string str)

{

str = str + " "; // 加入换行符

// 将命令行转化为byte[]

byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray());

// 由于每次写入的数据大小是有限制的,那么我们将每次写入的数据长度定在75个字节,一旦命令长度超过了75,就分步写入。

int start = 0;

int length = bWrite.Length;

int page = 0;

int size = 75;

int count = size;

try

{

if (length > 75)

{

// 数据分页

if ((length / size) * size < length)

page = length / size + 1;

else

page = length / size;

for (int i = 0; i < page; i++)

{

start = i * size;

if (i == page - 1)

count = length - (i * size);

netStream.Write(bWrite, start, count);// 将数据写入到服务器上

}

}

else

netStream.Write(bWrite, 0, bWrite.Length);

}

catch (Exception)

{

// 忽略错误

}

}

/// <summary>

/// 从流中读取字符

/// </summary>

/// <param name="netStream">来自TcpClient的流</param>

/// <returns>读取的字符</returns>

protected string ReadString(NetworkStream netStream)

{

string sp = null;

byte[] by = new byte[1024];

int size = netStream.Read(by, 0, by.Length);// 读取数据流

if (size > 0)

{

sp = Encoding.Default.GetString(by);// 转化为String

}

return sp;

}

/// <summary>

/// 发出命令并判断返回信息是否正确

/// </summary>

/// <param name="netStream">来自TcpClient的流</param>

/// <param name="command">命令</param>

/// <param name="state">正确的状态码</param>

/// <returns>是否正确</returns>

protected bool Command(NetworkStream netStream, string command, string state)

{

string sp = null;

bool success = false;

try

{

WriteString(netStream, command);// 写入命令

sp = ReadString(netStream);// 接受返回信息

if (sp.IndexOf(state) != -1)// 判断状态码是否正确

success = true;

}

catch (Exception)

{

// 忽略错误

}

return success;

}

/// <summary>

/// 字符串编码为Base64

/// </summary>

/// <param name="str">字符串</param>

/// <returns>Base64编码的字符串</returns>

protected string ToBase64(string str)

{

try

{

byte[] by = Encoding.Default.GetBytes(str.ToCharArray());

str = Convert.ToBase64String(by);

}

catch (Exception)

{

// 忽略错误

}

return str;

}

/// <summary>

/// 附件信息

/// </summary>

public struct AttachmentInfo

{

/// <summary>

/// 附件的文件名 [如果输入路径,则自动转换为文件名]

/// </summary>

public string FileName

{

get { return fileName; }

set { fileName = Path.GetFileName(value); }

} private string fileName;

/// <summary>

/// 附件的内容 [由经Base64编码的字节组成]

/// </summary>

public string Bytes

{

get { return bytes; }

set { if (value != bytes) bytes = value; }

} private string bytes;

/// <summary>

/// 从流中读取附件内容并构造

/// </summary>

/// <param name="ifileName">附件的文件名</param>

/// <param name="stream">流</param>

public AttachmentInfo(string ifileName, Stream stream)

{

fileName = Path.GetFileName(ifileName);

byte[] by = new byte[stream.Length];

stream.Read(by, 0, (int)stream.Length); // 读取文件内容

//格式转换

bytes = Convert.ToBase64String(by); // 转化为base64编码

}

/// <summary>

/// 按照给定的字节构造附件

/// </summary>

/// <param name="ifileName">附件的文件名</param>

/// <param name="ibytes">附件的内容 [字节]</param>

public AttachmentInfo(string ifileName, byte[] ibytes)

{

fileName = Path.GetFileName(ifileName);

bytes = Convert.ToBase64String(ibytes); // 转化为base64编码

}

/// <summary>

/// 从文件载入并构造

/// </summary>

/// <param name="path"></param>

public AttachmentInfo(string path)

{

fileName = Path.GetFileName(path);

FileStream file = new FileStream(path, FileMode.Open);

byte[] by = new byte[file.Length];

file.Read(by, 0, (int)file.Length); // 读取文件内容

//格式转换

bytes = Convert.ToBase64String(by); // 转化为base64编码

file.Close();

}

}

}

 
 
 
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