C#实现发送邮件的方法

本文实例为大家分享了android九宫格图片展示的具体代码，供大家参考，具体内容如下

#region 发送邮件部分
    private static string frommail = "[e-mail]";  ///邮箱名称
    private static string mailpwd = "111111";     ///密码
    private static string tomail = "[e-mail]";  ///邮箱服务器
    private static string filestr;//当前图片路径，在添加附件时用
    /// <summary>
    /// 发送邮件
    /// </summary>
    /// <param name="fileurl">附件地址，以~分</param>
    /// <param name="screen">是否发送截屏</param>
    /// <returns></returns>
    public static string sendmail(string fileurl, string screen)
    {
     
      mailaddress from = new mailaddress(frommail);
      mailaddress to = new mailaddress(tomail);

      mailmessage message = new mailmessage(from, to);
      message.subject = "m邮件 " +11111;//主题
      message.subjectencoding = system.text.encoding.utf8;

      attachment attachfile = new attachment(filestr);
      if (screen == "true")
        message.attachments.add(attachfile);

      string[] files = fileurl.split('~');
      for (int i = 0; i < files.length; i++)
      {
        if (file.exists(files[i]))
        {
          attachment attachfile1 = new attachment(fileurl);
          message.attachments.add(attachfile1);
        }
      }

      try
      {
        smtpclient client = new smtpclient("smtp." + from.host);

        sendmail(client, from, mailpwd, to, message);

       
        return "发送邮件成功！包含附件：" + fileurl + " 含截图？" + screen + "  " + datetime.now.tostring();
      }
      catch (smtpexception ex)
      {
        //如果错误原因是没有找到服务器，则尝试不加smtp.前缀的服务器
        if (ex.statuscode == smtpstatuscode.generalfailure)
        {
          try
          {
            //有些邮件服务器不加smtp.前缀
            smtpclient client = new smtpclient(from.host);
            sendmail(client, from, mailpwd, to, message);
          
            return "发送邮件成功！包含附件：" + fileurl + " 含截图？" + screen + "  " + datetime.now.tostring();

          }
          catch (smtpexception err)
          {
           
            return "发送邮件失败！" + err.message + "  " + datetime.now.tostring();
          }
        }
        else
        {
         
          return "发送邮件失败！" + ex.message + "  " + datetime.now.tostring();
        }
      }
    }

    //根据指定的参数发送邮件
    private static void sendmail(smtpclient client, mailaddress from, string password,
       mailaddress to, mailmessage message)
    {
      //不使用默认凭证,注意此句必须放在client.credentials的上面
      client.usedefaultcredentials = false;
      //指定用户名、密码
      client.credentials = new networkcredential(from.address, password);
      //邮件通过网络发送到服务器
      client.deliverymethod = smtpdeliverymethod.network;
      try
      {
        client.send(message);
      }
      catch
      {
        throw;
      }
      finally
      {
        //及时释放占用的资源
        message.dispose();
      }
    }

    #endregion

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。