前台代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default1.aspx.cs" Inherits="Default1" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <form id="form1" runat="server"> <div> 请输入您的邮箱：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br /> <asp:Button ID="Button1" runat="server" Text="发送验证码" /><br /><br /> 请输入验证码：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br /> <asp:Button ID="Button2" runat="server" Text="验证" /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </div> </form> </body> </html>
后台代码：
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Net; using System.Net.Mail; public partial class Default1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Button1.Click += Button1_Click; Button2.Click += Button2_Click; } void Button2_Click(object sender, EventArgs e) { if (TextBox2.Text.Trim() == Session["YZM"].ToString()) { Label1.Text = "OK"; } else { Label1.Text = "Error"; } } void Button1_Click(object sender, EventArgs e) { //创建SMTP调用服务类 SmtpClient smtp = new SmtpClient("smtp.sina.cn"); //创建发送人对象 MailAddress aaa = new MailAddress("18560812711@sina.cn"); //创建接收人对象 MailAddress to = new MailAddress(TextBox1.Text); //创建邮件对象 MailMessage mail = new MailMessage(aaa,to); //填充邮件主题 mail.Subject="来自于起航科技用户注册的验证码邮件"; //填充邮件内容 mail.Body="您的验证码为[1234]，请在20分钟内填写，此邮件为系统邮件，勿回复！"; Session["YZM"] = "1234"; //注册证书，验证发送人邮箱和密码 NetworkCredential net = new NetworkCredential("18560812711@sina.cn", "hq1234561"); //将证书关联到服务器对象等待验证 smtp.Credentials = net; //调用发送方法 smtp.Send(mail); } }
原文：http://www.cnblogs.com/123lucy/p/5815674.html