<%@ Control Language="C#" AutoEventWireup="true" CodeFile="login.ascx.cs" Inherits="login" %>
<style type="text/css">.style1{width: 273px;}.style3{width: 115px;}.style4{width: 101px;}
</style>
<table align="center" cellpadding="0" cellspacing="0" class="style1" style="height: 189px; width: 360px"><tr><td class="style4">用&nbsp; 户&nbsp; 名：</td><td class="style3"><asp:TextBox ID="txtUserName" runat="server" Width="150px"></asp:TextBox></td><td><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtUserName" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td></tr><tr><td class="style4">密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 码：</td><td class="style3"><asp:TextBox ID="txtPwd" runat="server" TextMode="Password" Width="150px"></asp:TextBox></td><td><asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtPwd" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td></tr><tr><td class="style4">安全问题：</td><td class="style3"><asp:TextBox ID="txtquestion" runat="server" Width="150px"></asp:TextBox></td><td><asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ControlToValidate="txtquestion" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td></tr><tr><td class="style4">提示答案：</td><td class="style3"><asp:TextBox ID="txtresult" runat="server" Width="150px"></asp:TextBox></td><td><asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="txtresult" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td></tr><tr><td class="style4">电子邮件：</td><td class="style3"><asp:TextBox ID="txtEmail" runat="server" Width="150px"></asp:TextBox></td><td valign="middle"><asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="txtEmail" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator><asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" BorderStyle="Solid" BorderWidth="1px" ControlToValidate="txtEmail" Display="Dynamic" ErrorMessage="邮件地址错误" Font-Overline="False" Font-Size="10pt" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator></td></tr><tr><td class="style4">输入住址：</td><td colspan="2"><asp:TextBox ID="txtaddr" runat="server" Width="149px"></asp:TextBox><asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="txtaddr" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td></tr><tr><td class="style4">&nbsp;</td><td colspan="2"><asp:Button ID="Button1" runat="server" Text="注册" onclick="Button1_Click" />
&nbsp;<asp:Button ID="Button2" runat="server" Text="重置" onclick="Button2_Click" CausesValidation="False" /></td></tr></table>

public partial class login : System.Web.UI.UserControl
{protected void Page_Load(object sender, EventArgs e){}protected void Button2_Click(object sender, EventArgs e){txtEmail.Text = "";txtPwd.Text = "";txtquestion.Text = "";txtresult.Text = "";txtUserName.Text = "";txtaddr.Text = "";}protected void Button1_Click(object sender, EventArgs e){string sqlstr = System.Configuration.ConfigurationManager.AppSettings["con"].ToString();SqlConnection conn = new SqlConnection(sqlstr);conn.Open();SqlCommand cmd = new SqlCommand();cmd.Connection = conn;cmd.CommandType = CommandType.Text;cmd.CommandText = "select count(*) from Tb_Login where UseName='"+txtUserName.Text.Trim()+"'";int flag=int.Parse(cmd.ExecuteScalar().ToString());if (flag > 0){Page.ClientScript.RegisterStartupScript(this.Parent.GetType(), "", "alert('该用户名已经存在');", true);}else{cmd.CommandText = "insert into Tb_Login(UseName,UsePassword,UserEmail,Question,UserKey,Useraddr) values ('" + txtUserName.Text + "','" + txtPwd.Text + "','" + txtEmail.Text + "','" + txtquestion.Text + "','" + txtresult.Text + "','"+txtaddr.Text+"')";if(cmd.ExecuteNonQuery()>0){Page.ClientScript.RegisterStartupScript(this.Parent.GetType(), "", "alert('用户注册成功');", true);}else{Page.ClientScript.RegisterStartupScript(this.Parent.GetType(), "", "alert('用户注册失败');", true);}}conn.Close();}
}

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %><%@ Register src="login.ascx" tagname="login" tagprefix="uc1" %><!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>无标题页</title>
</head>
<body><form id="form1" runat="server"><div><uc1:login ID="login1" runat="server" /></div></form>
</body>
</html>