SSIS Send Mail

在SSIS中Send Mail的方法主要有三种,使用Send Mail Task,使用Script Task和使用存储过程msdb.dbo.sp_send_dbmail。

一,使用Send Mail Task

Send Mail Task 是SSIS提供的Task,使用非常简单,但有限制:

  1. 只能发送普通的文本格式的邮件,不支持 HTML 格式的邮件。
  2. 链接到SMTP Server有两种验证方式,在域中使用 Windows 方式验证,或使用匿名验证。
  3. SMTP Server 使用默认的端口号25

Send Mail Task的限制是跟SMTP connection manager的配置有关

SMTP Sever:输入SMTP Server的URL

Authentication:如果选择Use Winodows Authentication,那么用户必须在域中,使用Windows账户验证;如果不选择Use Winodows Authentication,那么验证方式就是使用匿名访问SMTP Server,如果SMTP Server支持匿名访问,那么验证失败。

Enable Secure Sockerts Layer(SSL):是否对数据加密,SSL用以保障在Internet上数据传输之安全,利用数据加密(Encryption)技术,可确保数据在网络上之传输过程中不会被截取及窃听

Timeout:超时时间

Package中使用Send Mail Task发送mail,这个mail带excel的附件,当成功发送一定数量的mail之后,发现一个问题,错误信息是

System.IO.IOException:Unable to write data to the transport connection: An existing connection was forcibly closed by the remote host.

System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host.

经过测试,错误原因可能是SMTP Server为链接预留缓存空间(8M),当附件的数据量到达8M阈值时,SMTP返回错误信息,将链接强制关闭。

Send Mail Task在循环使用SMTP Server的链接时,打开链接后,不会自动关闭。

我的疑问:为什么SMTP Server的链接不会自动关闭?

二,使用存储过程msdb.dbo.sp_send_dbmail

在Execute SQL Task中使用存储过程msdb.dbo.sp_send_dbmail 发送数据库邮件

三,使用Script Task,编写脚本发送mail

编写C#代码发送mail,主要是使用System.Net.Mail 类库来实现,需要添加命名空间

using System.Net.Mail; 

使用Script Task,能够使用HTML格式,也能使用密码进行验证,因此适用面光,能够编写格式比较丰富的邮件。

示例代码

 public void Main()
        {
            //Define Smtp client
            int smtpPort = 25;
            String smtpServer = "smtp server url";
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Host = smtpServer;
            smtpClient.Port = smtpPort;

            //Use Password Authentication
            string loginUser = "";
            string loginPwd = "";

            System.Net.NetworkCredential myCredentials =
                new System.Net.NetworkCredential(loginUser, loginPwd);
            smtpClient.Credentials = myCredentials;

            //Use anonymous Authentication
            //smtpClient.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;

            //define mail message
            MailMessage message = new MailMessage();

            //Define mail address
            MailAddress fromAddress = new MailAddress("Sender Address", "Sender Name");
            MailAddress toAddress = new MailAddress("Recipient Address", "Recipient Name");

            message.From = fromAddress;
            message.To.Add(toAddress);
            //message.To.Add("Recipient Address");

            message.Subject = "mail subject";

            //Define Mail Body
            message.Body = "text Mail Body";
            message.IsBodyHtml = false;

            //message.Body = "html mail body";
            //message.IsBodyHtml = true;

            // add attachment
            string strAttachedFilePath="";
            Attachment attachment = new Attachment(strAttachedFilePath);
            message.Attachments.Add(attachment);

            //Define Mail Priority
            int iPriority = 1;
            switch (iPriority)
            {
                case 1:
                    message.Priority = MailPriority.High;
                    break;
                case 3:
                    message.Priority = MailPriority.Low;
                    break;
                default:
                    message.Priority = MailPriority.Normal;
                    break;
            }

            smtpClient.Send(message);

            //Dispose attachment
            attachment.Dispose();

            //Dispose Message
            message.Dispose();

            //Dispose Stmp client
            smtpClient.Dispose();

            // Close Script Task with success
            Dts.TaskResult = (int)ScriptResults.Success;
        }

注意:如果不将Attachment Dispose,循环使用附件时,SSIS会报附件正在被其他process使用的异常。

时间: 2024-08-09 10:00:22

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