c#帮助类：发送邮件

 1         private static string isopensendmail = configurationmanager.appsettings["isopensendmail"]; //是否启用异常消息发送邮箱功能
 2         private static string senduser=configurationmanager.appsettings["mailusername"];
 3         private static string sendpass= configurationmanager.appsettings["mailpassword"];
 4         private static string receivemail = configurationmanager.appsettings["receivemail"];
 5         private static string mailhost = configurationmanager.appsettings["mailhost"]; //smtp.gmail.com
 6         private static string mailport = configurationmanager.appsettings["mailport"]; //gmail的smtp端口587
 7         /// <summary>
 8         /// 
 9         /// </summary>
10         /// <param name="mailname">标题</param>
11         /// <param name="body">内容</param>
12         /// <param name="encoding">编码</param>
13         /// <param name="isbodyhtml">是否html</param>
14         /// <param name="enablessl">是否ssl加密连接</param>
15         /// <returns>是否成功</returns>
16         /// <returns></returns>
17         public static void sendmail(string mailname, string body, string encoding = "utf-8", bool isbodyhtml = true, bool enablessl = true)
18         {
19             try
20             {
21                 if (!string.isnullorempty(isopensendmail) && isopensendmail=="开启")
22                 {
23                     mailmessage message = new mailmessage();
24                     message.to.add(new mailaddress(receivemail)); // 接收人邮箱地址
25                     message.from = new mailaddress(senduser, mailname);
26                     message.bodyencoding = encoding.getencoding(encoding);
27                     message.body = body;
28                     //gb2312
29                     message.subjectencoding = encoding.getencoding(encoding);
30                     message.subject = mailname;
31                     message.isbodyhtml = isbodyhtml;
32 
33                     smtpclient smtpclient = new smtpclient(mailhost, convert.toint32(mailport)); //gmail的smtp端口587
34                     smtpclient.credentials = new system.net.networkcredential(senduser, sendpass);
35                     smtpclient.enablessl = enablessl; //gmail要求ssl连接
36                     smtpclient.deliverymethod = smtpdeliverymethod.network; //gmail的发送方式是通过网络的方式，需要指定
37                     smtpclient.send(message);
38                 }
39             }
40             catch (exception ex)
41             {
42             }
43         }