using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mail;

/// summary>
///mailhelper 的摘要说明
/// /summary>
public class mailhelper
{
    public mailhelper()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    /// summary>
    /// 邮件发送操作
    /// /summary>
    /// param name="Addressee">收件人地址/param>
    /// param name="From">发件人地址/param>
    /// param name="sendpassword">发件人密码/param>
    /// param name="Copy">抄送人地址/param>
    /// param name="secret">密送人地址/param>
    /// param name="Subject">发送主题/param>
    /// param name="Attachment">附件信息/param>
    /// param name="Body">邮件内容/param>
    public string SendeEmal(string Addressee, string From, string sendpassword, string Copy, string secret, string Subject, string Attachment, string Body)
    {
        MailMessage objMailMessage;
        MailAttachment objMailAttachment;

        // 创建邮件消息
        objMailMessage = new MailMessage();

        //发件人EMAIL
        objMailMessage.From = From;//源邮件地址

        //收件人EMAIL
        objMailMessage.To = Addressee; //目的邮件地址
        //邮件抄送
        objMailMessage.Cc = Copy;
        //邮件misong
        objMailMessage.Bcc = secret;

        //邮件主题
        objMailMessage.Subject = Subject; //发送邮件的标题

        //邮件内容
        objMailMessage.Body = Body;//发送邮件的内容

        // 创建一个附件对象
        if (Attachment != "")
        {
            objMailAttachment = new MailAttachment(Attachment);//发送邮件的附件 c:\\test.txt
            objMailMessage.Attachments.Add(objMailAttachment);//将附件附加到邮件消息对象中
        }

        //接着利用SMTP来发送邮件，需要使用Microsoft .NET Framework SDK v1.1和它以上的版本
        //基本权限
        objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
        //用户名
        string name = From.Substring(0, From.IndexOf('@'));
        objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", name);
        //密码
        objMailMessage.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", sendpassword);
        //如果没有上述三行代码，则出现如下错误提示：服务器拒绝了一个或多个收件人地址。服务器响应为: 554 : Client host rejected: Access denied
        //SMTP地址     
        string smtp = "smtp." + From.Substring(From.IndexOf('@') + 1);
        SmtpMail.SmtpServer = "smtp." + From.Substring(From.IndexOf('@') + 1);
        //开始发送邮件

        try
        {
            SmtpMail.Send(objMailMessage);
            return "邮件发送成功！";
        }
        catch (System.Net.Mail.SmtpException ex)
        {
            return ex.Message;
        }
        //核心代码结束
    }
}

%@ Page Language="C#" AutoEventWireup="true" CodeFile="mail.aspx.cs" Inherits="information_mail"
    ValidateRequest="false" %>

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">
head runat="server">
    title>/title>
    script src="../Style/jquery/jquery.js" type="text/javascript">/script>
    script src="../Style/jquery/jquery.validate.js" type="text/javascript">/script>
    script language="javascript" type="text/javascript">

        function gei() {
            var file_value = document.getElementById("File1").value;
            document.getElementById("HiddenField1").value = file_value;
        }
    /script>
/head>
body>
    form id="form1" runat="server">
    div>
        发给：asp:TextBox ID="TextBox1" runat="server">/asp:TextBox>br />
        抄送：asp:TextBox ID="TextBox2" runat="server">/asp:TextBox>br />
        密送：asp:TextBox ID="TextBox4" runat="server">/asp:TextBox>br />
        主题：asp:TextBox ID="TextBox5" runat="server">/asp:TextBox>br />
        内容：asp:TextBox ID="TextBox3" runat="server">/asp:TextBox>br />
        附件：input id="File1" type="file" />
        %--asp:TextBox ID="TextBox6" runat="server">/asp:TextBox>--%>
        br />
        asp:Button ID="Button1" runat="server" Text="发送" OnClientClick="gei()" OnClick="Button1_Click" />br />
        asp:Label ID="Label1" runat="server" Text="">/asp:Label>
    /div>
    asp:HiddenField ID="HiddenField1" runat="server" />
    /form>
/body>
/html>

protected void Button1_Click(object sender, EventArgs e)
    {        //实例邮件帮助类
        mailhelper mails = new mailhelper();

        string filePath = HiddenField1.Value;

        string a = mails.SendeEmal(TextBox1.Text, "邮件账号", "邮件密码", TextBox2.Text, TextBox4.Text, TextBox5.Text, filePath, TextBox3.Text);

        Label1.Text = a;
}