asp.net 利用 Global.asax 定时发送邮件

<%@ Application Language="C#" %>
<%@ Import Namespace="System.Threading" %>
<%@ Import Namespace="System.Timers" %>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Net" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="Model" %>
<%@ Import Namespace="BLL" %>
<%@ Import Namespace="DBUtility" %>

<script runat="server">

void Application_Start(object sender, EventArgs e)
{
//在应用程序启动时运行的代码
//定义定时器
System.Timers.Timer myTimer = new System.Timers.Timer(60000);//1分钟
myTimer.Elapsed += new ElapsedEventHandler(myTimer_Elapsed);
myTimer.AutoReset = true;//设置是执行一次（false）还是一直执行(true);
myTimer.Enabled = true;//是否执行System.Timers.Timer.Elapsed事件;

}
void myTimer_Elapsed(object source, ElapsedEventArgs e)
{
try
{
DateTime dt1 = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd")+" 23:17:59");
DateTime dt2 = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd") + " 23:18:59");
DateTime dt3 = DateTime.Now;
//if (DateTime.Compare(dt1, dt2) >= 0)

if (dt3 > dt1 && dt3 < dt2)
{
//在这里写你需要执行的任务
string name=System.DateTime.Now.ToString("yyyyMMdd");
string pFilePath = @"C:\web\SaveFile\" + name + ".xlsx";//附件，分号隔开
string receiver = "xxxx@163.com";//分号隔开
string AddRecipientCC = "";//分号隔开
string table = "定时任务，定时邮件";
table += '\n';
table += "看到此信息代表发送成功！";

sendEmail("xx", "xxxx@163.com", "1111123334", receiver, AddRecipientCC, "定时邮件", table, "smtp.163.com", pFilePath);
}
}

catch (Exception ex)
{
throw new Exception(ex.Message, ex);
}

}
//发送邮件方法
public bool sendEmail(string senderuser/*发件人显示发送时的名称*/, string euser/*发件人邮箱地址*/, string epwd/*发件人邮箱密码*/
, string receiver/*收件人邮箱地址*/, string AddRecipientCC/*cc抄送邮箱地址*/, string subject/*邮件标题*/, string body/*邮件内容*/
, string eserver/*邮件服务器smtp.harmony.com.cn*/, string attachment/*邮件附件;隔开,附件为空可传null*/)//9个参数
{
jmail.MessageClass jmMessage = new jmail.MessageClass();
jmMessage.Charset = "GB2312";
jmMessage.ISOEncodeHeaders = false;
jmMessage.From = euser;
jmMessage.FromName = senderuser;
jmMessage.Subject = subject;
jmMessage.MailServerUserName = euser;
jmMessage.MailServerPassWord = epwd;
if (!string.IsNullOrEmpty(receiver))
{
string[] recip = receiver.Replace('；', ';').Split(';');
foreach (string item in recip)
{
jmMessage.AddRecipient(item.Trim(), "", "");
}
}
if (!string.IsNullOrEmpty(AddRecipientCC))
{
string[] cc = AddRecipientCC.Replace('；', ';').Split(';');
foreach (string item in cc)
{
jmMessage.AddRecipientCC(item.Trim(), "", "");
}
}
jmMessage.Body = body;
#region 附件
if (!string.IsNullOrEmpty(attachment))
{
string[] attach = attachment.Split(';');
foreach (string item in attach)
{
string ContentType = "";
switch (item.Trim().Substring(item.LastIndexOf(".") + 1).ToLower())
{
case "pdf":
ContentType = "application/pdf";
break;
case "jpg":
case "jpeg":
ContentType = "image/jpeg";
break;
case "gif":
ContentType = "image/gif";
break;
case "png":
ContentType = "image/png";
break;
case "bmp":
ContentType = "image/bmp";
break;
case "zip":
ContentType = "application/zip";
break;
case "txt":
ContentType = "text/plain";
break;
case "htm":
case "html":
ContentType = "text/html";
break;
case "doc":
ContentType = "application/msword";
break;
case "xls":
ContentType = "application/vnd.ms-excel";
break;
case "ppt":
ContentType = "application/vnd.ms-powerpoint";
break;
default:
ContentType = "application/octet-stream";
break;
}

jmMessage.AddAttachment(item, true, ContentType);
}

}
#endregion
bool result = jmMessage.Send(eserver, false);
jmMessage = null;
return result;
}
void Application_End(object sender, EventArgs e)
{
//在应用程序关闭时运行的代码
//下面的代码是关键，可解决IIS应用程序池自动回收的问题
Thread.Sleep(1000);
//这里设置你的web地址，可以随便指向你的任意一个aspx页面甚至不存在的页面，目的是要激发Application_Start
string url = "http://192.168.0.1/web/";

HttpWebRequest myHttpWebRequest = (HttpWebRequest)System.Net.WebRequest.Create(url);
HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
Stream receiveStream = myHttpWebResponse.GetResponseStream();//得到回写的字节流
}

void Application_Error(object sender, EventArgs e)
{
//在出现未处理的错误时运行的代码

}

void Session_Start(object sender, EventArgs e)
{
//在新会话启动时运行的代码

}

void Session_End(object sender, EventArgs e)
{
//在会话结束时运行的代码。
// 注意: 只有在 Web.config 文件中的 sessionstate 模式设置为
// InProc 时，才会引发 Session_End 事件。如果会话模式
//设置为 StateServer 或 SQLServer，则不会引发该事件。

}

</script>