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.Data.SqlClient;
public partial class Login : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnLogin_Click(object sender, EventArgs e)
{
string connstr = "Data Source=GFWMJ3FJ7JLJJBR;Initial Catalog=ZT_DB.MDF;Persist Security Info=True;User ID=sa;Password=111111";
using (SqlConnection conn = new SqlConnection(connstr))
{
conn.Open();
using (SqlCommand cmd = conn.CreateCommand())
{
cmd.CommandText = "Select * from person where person_name=@u";
cmd.Parameters.Add(new SqlParameter("u",txtUserName.Text));
SqlDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
if (reader.GetString(reader.GetOrdinal("pwd")) == txtPassword.Text)
{
Response.Redirect("Page1.aspx");
}
else
{
Label1.Text = "密码不正确";
}
}
else
{
Label1.Text = "用户名不存在!";
}
}
}
}
}
login.aspx:
<%@ Page Language="C#" CodeFile="Login.aspx.cs" Inherits="Login" %>
<!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>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td></td>
<td>用户名:</td>
<td></td>
<td>
<asp:TextBox ID="txtUserName" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td>密 码:</td>
<td></td>
<td>
<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td> <asp:Button ID="btnLogin" runat="server" Text="登录" οnclick="btnLogin_Click" /></td>
<td></td>
<td><asp:Button ID="btnClear" runat="server" Text="注册" /></td>
<td>
<asp:Label ID="Label1" runat="server" Text=""></asp:Label></td>
</tr>
</table>
</div>
</form>
</body>
</html>