C#、ASP.NET、WinForm - 实现邮件发送的功能

转载自：http://www.cnblogs.com/mingmingruyuedlut/archive/2011/10/14/2212255.html

• 发送邮件所用的核心知识点

• 微软封装好的MailMessage类：主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
• 微软封装好的SmtpClient类：主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
• SmtpClient主要进行了三层的封装：Socket --> TcpClient --> SmtpClient

• 具体代码请看如下所示：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Net.Mail;
 using System.Net.Mime;
 using System.IO;
 using System.Timers;
 using System.Xml;

 namespace MyEmailTest
 {
     class Program
     {
         static void Main(string[] args)
         {
             try
             {
                 //smtp.163.com
                 string senderServerIp = "123.125.50.133";
                 //smtp.gmail.com
                 //string senderServerIp = "74.125.127.109";
                 //smtp.qq.com
                 //string senderServerIp = "58.251.149.147";
                 //string senderServerIp = "smtp.sina.com";
                 string toMailAddress = "mingmingruyuedlut@163.com";
                 string fromMailAddress = "mingmingruyuedlut@163.com";
                 string subjectInfo = "Test sending e_mail";
                 string bodyInfo = "Hello Eric, This is my first testing e_mail";
                 string mailUsername = "mingmingruyuedlut";
                 string mailPassword = ".........."; //发送邮箱的密码（）
                 string mailPort = "";
                 string attachPath = "E:\\123123.txt; E:\\haha.pdf";

                 MyEmail email = new MyEmail(senderServerIp, toMailAddress, fromMailAddress, subjectInfo, bodyInfo, mailUsername, mailPassword, mailPort, false, false);
                 email.AddAttachments(attachPath);
                 email.Send();
             }
             catch (Exception ex)
             {
                 Console.WriteLine(ex.ToString());
             }
         }
     }

     public class MyEmail
     {
         private MailMessage mMailMessage;   //主要处理发送邮件的内容（如：收发人地址、标题、主体、图片等等）
         private SmtpClient mSmtpClient; //主要处理用smtp方式发送此邮件的配置信息（如：邮件服务器、发送端口号、验证方式等等）
         private int mSenderPort;   //发送邮件所用的端口号（htmp协议默认为25）
         private string mSenderServerHost;    //发件箱的邮件服务器地址（IP形式或字符串形式均可）
         private string mSenderPassword;    //发件箱的密码
         private string mSenderUsername;   //发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）
         private bool mEnableSsl;    //是否对邮件内容进行socket层加密传输
         private bool mEnablePwdAuthentication;  //是否对发件人邮箱进行密码验证

         ///<summary>
         /// 构造函数
         ///</summary>
         ///<param name="server">发件箱的邮件服务器地址</param>
         ///<param name="toMail">收件人地址（可以是多个收件人，程序中是以“;"进行区分的）</param>
         ///<param name="fromMail">发件人地址</param>
         ///<param name="subject">邮件标题</param>
         ///<param name="emailBody">邮件内容（可以以html格式进行设计）</param>
         ///<param name="username">发件箱的用户名（即@符号前面的字符串，例如：hello@163.com，用户名为：hello）</param>
         ///<param name="password">发件人邮箱密码</param>
         ///<param name="port">发送邮件所用的端口号（htmp协议默认为25）</param>
         ///<param name="sslEnable">true表示对邮件内容进行socket层加密传输，false表示不加密</param>
         ///<param name="pwdCheckEnable">true表示对发件人邮箱进行密码验证，false表示不对发件人邮箱进行密码验证</param>
         public MyEmail(string server, string toMail, string fromMail, string subject, string emailBody, string username, string password, string port, bool sslEnable, bool pwdCheckEnable)
         {
             try
             {
                 mMailMessage = new MailMessage();
                 mMailMessage.To.Add(toMail);
                 mMailMessage.From = new MailAddress(fromMail);
                 mMailMessage.Subject = subject;
                 mMailMessage.Body = emailBody;
                 mMailMessage.IsBodyHtml = true;
                 mMailMessage.BodyEncoding = System.Text.Encoding.UTF8;
                 mMailMessage.Priority = MailPriority.Normal;
                 this.mSenderServerHost = server;
                 this.mSenderUsername = username;
                 this.mSenderPassword = password;
                 this.mSenderPort = Convert.ToInt32(port);
                 this.mEnableSsl = sslEnable;
                 this.mEnablePwdAuthentication = pwdCheckEnable;
             }
             catch (Exception ex)
             {
                 Console.WriteLine(ex.ToString());
             }
         }

         ///<summary>
         /// 添加附件
         ///</summary>
         ///<param name="attachmentsPath">附件的路径集合，以分号分隔</param>
         public void AddAttachments(string attachmentsPath)
         {
             try
             {
                 string[] path = attachmentsPath.Split(';'); //以什么符号分隔可以自定义
                 Attachment data;
                 ContentDisposition disposition;
                 for (int i = ; i < path.Length; i++)
                 {
                     data = new Attachment(path[i], MediaTypeNames.Application.Octet);
                     disposition = data.ContentDisposition;
                     disposition.CreationDate = File.GetCreationTime(path[i]);
                     disposition.ModificationDate = File.GetLastWriteTime(path[i]);
                     disposition.ReadDate = File.GetLastAccessTime(path[i]);
                     mMailMessage.Attachments.Add(data);
                 }
             }
             catch (Exception ex)
             {
                 Console.WriteLine(ex.ToString());
             }
         }

         ///<summary>
         /// 邮件的发送
         ///</summary>
         public void Send()
         {
             try
             {
                 if (mMailMessage != null)
                 {
                     mSmtpClient = new SmtpClient();
                     //mSmtpClient.Host = "smtp." + mMailMessage.From.Host;
                     mSmtpClient.Host = this.mSenderServerHost;
                     mSmtpClient.Port = this.mSenderPort;
                     mSmtpClient.UseDefaultCredentials = false;
                     mSmtpClient.EnableSsl = this.mEnableSsl;
                     if (this.mEnablePwdAuthentication)
                     {
                         System.Net.NetworkCredential nc = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
                         //mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
                         //NTLM: Secure Password Authentication in Microsoft Outlook Express
                         mSmtpClient.Credentials = nc.GetCredential(mSmtpClient.Host, mSmtpClient.Port, "NTLM");
                     }
                     else
                     {
                         mSmtpClient.Credentials = new System.Net.NetworkCredential(this.mSenderUsername, this.mSenderPassword);
                     }
                     mSmtpClient.DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network;
                     mSmtpClient.Send(mMailMessage);
                 }
             }
             catch (Exception ex)
             {
                 Console.WriteLine(ex.ToString());
             }
         }
     }
 }

要开启邮箱的SmTP服务。