发邮件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Mail;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
/// <summary>
/// EMailTo 的摘要说明
/// </summary>
public class EMailTo
{
public string SendMail(DataTable dt_to,string subjects,string bodys)
{
DataTable dtemail = QueryWorkerAndEmail();
System.Net.Mail.MailMessage msg = new System.Net.Mail.MailMessage();
foreach (DataRow row in dt_to.Rows)
{
foreach (DataRow item in dtemail.Rows)
{
if (row["WorkNumber"].ToString().Trim().ToUpper() == item["WorkNumber"].ToString().Trim().ToUpper())
{
msg.To.Add(item["Email"].ToString());
break;
}
}
}
//msg.To.Add("zhangping_it@lhys.cc");
//msg.To.Add(b@b.com);
/*
* msg.To.Add("b@b.com");可以发送给多人
* msg.CC.Add("c@c.com");可以抄送给多人
*/
msg.From = new MailAddress("服务器邮箱", "在线考试系统", System.Text.Encoding.UTF8);
/* 上面3个参数分别是发件人地址（可以随便写），发件人姓名，编码*/
msg.Subject = subjects;//邮件标题
msg.SubjectEncoding = System.Text.Encoding.UTF8;//邮件标题编码
msg.Body = bodys;//邮件内容
msg.BodyEncoding = System.Text.Encoding.UTF8;//邮件内容编码
msg.IsBodyHtml = true;//是否是HTML邮件
msg.Priority = MailPriority.Normal;//邮件优先级

SmtpClient client = new SmtpClient();
client.Credentials = new System.Net.NetworkCredential("服务器邮箱", "密码");
//在71info.com注册的邮箱和密码
client.Host = ""; //smtp.
object userState = msg;
try
{
client.SendAsync(msg, userState);
//简单一点儿可以client.Send(msg);
return "发送成功！";
}
catch (System.Net.Mail.SmtpException ex)
{
return "发送失败，" + ex;
}
}
//初始化员工信息
public DataTable QueryWorkerAndEmail()
{
SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings["LogInConnectionString"].ConnectionString);
Conn.Open();
string strSQL = "SELECT TOP 1000 [WorkNumber] ,[Email] FROM [OnLineExam].[dbo].[EmployeEmail]";
SqlDataAdapter da = new SqlDataAdapter(strSQL.ToString(), Conn);
//实例化 DataSet 数据集 这个数据集会绑定在gridview上
DataSet data = new DataSet();
//向数据集中fill（填入）数据 da填入data
da.Fill(data, "table");
return data.Tables[0];
}
}