asp.net 发送邮件函数两则

 using System.Net.Mail;
 using System.Text;
 using System.Net;
    #region 邮件发送
         /// <summary>
         /// 邮件发送
         /// </summary>
         /// <param name="str">字符串</param>
         /// <returns></returns>
         public static string SendMail(string mailtitle, string mailcontent, string toemail, string toname)
         {
             ////设置发件人信箱,及显示名字
             MailAddress from = new MailAddress("xxx@xxx.com", "xxx");
             //设置收件人信箱,及显示名字
             MailAddress to = new MailAddress(toemail, toname);
             //创建一个MailMessage对象
             MailMessage oMail = new MailMessage(from, to);
             oMail.Subject = mailtitle; //邮件标题
             oMail.Body = mailcontent; //邮件内容
             oMail.IsBodyHtml = true; //指定邮件格式,支持HTML格式
             oMail.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");//邮件采用的编码
             oMail.Priority = MailPriority.High;//设置邮件的优先级为高
             //发送邮件服务器
             SmtpClient client = new SmtpClient();
             client.Host = "mail.xxxx.com"; //指定邮件服务器
             client.Credentials = new NetworkCredential("xxx@xxxx.com", "xxxxx");//指定服务器邮件,及密码
             //发送
             try
             {
                 client.Send(oMail); //发送邮件
                 oMail.Dispose(); //释放资源
                 return "";
             }
             catch (Exception ex)
             {
                 oMail.Dispose(); //释放资源
                 return ex.Message;
             }
         }
         #endregion
         #region   自定义邮件发送
         /// <summary>
         /// 邮件发送
         /// </summary>
         /// <param name="str">字符串</param>
         /// <returns></returns>
         public static string SendMail(string fromEmail,string fromName,string host,string username,string password,string mailtitle, string mailcontent, string toemail, string toname)
         {
             ////设置发件人信箱,及显示名字
             MailAddress from = new MailAddress(fromEmail, fromName);
             //设置收件人信箱,及显示名字
             MailAddress to = new MailAddress(toemail, toname);
             //创建一个MailMessage对象
             MailMessage oMail = new MailMessage(from, to);
             oMail.Subject = mailtitle; //邮件标题
             oMail.Body = mailcontent; //邮件内容
             oMail.IsBodyHtml = true; //指定邮件格式,支持HTML格式
             oMail.BodyEncoding = System.Text.Encoding.GetEncoding("GB2312");//邮件采用的编码
             oMail.Priority = MailPriority.High;//设置邮件的优先级为高
             //发送邮件服务器
             SmtpClient client = new SmtpClient();
             client.Host = host; //指定邮件服务器
             client.Credentials = new NetworkCredential(username,password);//指定服务器邮件,及密码
             //发送
             try
             {
                 client.Send(oMail); //发送邮件
                 oMail.Dispose(); //释放资源
                 return "";
             }
             catch (Exception ex)
             {
                 oMail.Dispose(); //释放资源
                 return ex.Message;
             }
         }
         #endregion