C#基础-邮件发送

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using System.Net.Mail;
 using System.Net.Mime;
 using System.Net;
 using System.IO;  

 namespace TestForm
 {
     class Email
     {
         string smtpHost = string.Empty;
         string Sendmailaddress = string.Empty;
         string Sendpassword = string.Empty;
         string SendDisplayname = string.Empty;
         string Recevivemailaddress = string.Empty;
         string ReceviveDisplayname = string.Empty;

         /// <summary>
         ///
         /// </summary>
         /// <param name="host">主机号</param>
         /// <param name="sendmailaddress">发送人邮箱地址</param>
         /// <param name="sendpassword">发送邮箱密码</param>
         /// <param name="sendDisplayname">发送人显示名称</param>
         /// <param name="recevivemailaddress">接收人邮箱地址</param>
         /// <param name="receviveDisplayname">接收人显示名称</param>
         public Email(string host, string sendmailaddress, string sendpassword, string sendDisplayname, string recevivemailaddress, string receviveDisplayname)
         {
             smtpHost = host;
             Sendmailaddress = sendmailaddress;
             Sendpassword = sendpassword;
             SendDisplayname = sendDisplayname;
             Recevivemailaddress = recevivemailaddress;
             ReceviveDisplayname = receviveDisplayname;
         }

         /// <summary>
         /// 发送邮件功能
         /// </summary>
         /// <param name="mailsubject">邮件标题</param>
         /// <param name="mailbody">邮件主要内容</param>
         /// <param name="isadddocument">是否添加附件</param>
         /// <param name="documentpath">添加附件的文件路径列表</param>
         /// <returns></returns>
         public bool Sendmail(string mailsubject, string mailbody, bool isadddocument, List<string> documentpath)
         {
             bool sendstatus = false;
             try
             {
                 System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient(smtpHost);  //确定smtp服务器地址。实例化一个Smtp客户端
                 MailAddress from = new MailAddress(Sendmailaddress, SendDisplayname, Encoding.UTF8);//构造一个发件人地址对象
                 MailAddress to = new MailAddress(Recevivemailaddress, ReceviveDisplayname, Encoding.UTF8);//构造一个收件人地址对象
                 MailMessage message = new MailMessage(from, to);//构造一个Email的Message对象

                 message.Subject = mailsubject;
                 message.SubjectEncoding = Encoding.UTF8;
                 message.Body = mailbody;
                 message.BodyEncoding = Encoding.UTF8;

                 //设置邮件的信息
                 client.DeliveryMethod = SmtpDeliveryMethod.Network;
                 message.BodyEncoding = System.Text.Encoding.UTF8;
                 message.IsBodyHtml = false;

                 //如果服务器支持安全连接，则将安全连接设为true。
                 //如果是gmail则一定要将其设为true
                 if (smtpHost == "smpt.gmail.com")
                     client.EnableSsl = true;
                 else
                     client.EnableSsl = false;

                 if (isadddocument == true)
                 {
                     AddDocument(message, documentpath);
                 }
                 client.UseDefaultCredentials = false;
                 //用户登陆信息
                 NetworkCredential myCredentials = new NetworkCredential(Sendmailaddress, Sendpassword);
                 client.Credentials = myCredentials;
                 //发送邮件
                 client.Send(message);
                 sendstatus = true;
             }
             catch { }
             return sendstatus;
         }

         /// <summary>
         /// 添加附件功能
         /// </summary>
         /// <param name="message">Mailmessage对象</param>
         /// <param name="Documentpath">附件路径列表</param>
         private void AddDocument(MailMessage message, List<string> Documentpath)
         {
             foreach(string filepath in Documentpath)
             {
                 try
                 {
                     if (File.Exists(filepath)) //判断文件是否存在
                     {
                         Attachment attach = new Attachment(filepath);    //构造一个附件对象
                         ContentDisposition disposition = attach.ContentDisposition;   //得到文件的信息
                         disposition.CreationDate = System.IO.File.GetCreationTime(filepath);
                         disposition.ModificationDate = System.IO.File.GetLastWriteTime(filepath);
                         disposition.ReadDate = System.IO.File.GetLastAccessTime(filepath);
                         message.Attachments.Add(attach);   //向邮件添加附件
                     }
                 }
                 catch { }
             }
         }
     }
 }

做网站的时候用到，看到一篇博文：http://www.cnblogs.com/youring2/archive/2008/11/29/1343911.html

深感有用，特小修并写成类，希望能帮人帮己~