HTML代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DengLu.aspx.cs" Inherits="DengLu" %>
<!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>
<h1>登录</h1>
<asp:Label ID="Label1" runat="server" Text="用户名:"></asp:Label>
<asp:TextBox ID="txtUid" runat="server"></asp:TextBox>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="密码:"></asp:Label>
<asp:TextBox ID="txtPwd" runat="server"></asp:TextBox>
<br />
<br />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="登录" />
<br />
</div>
<asp:Literal ID="Literal1" runat="server"></asp:Literal>
</form>
</body>
</html>
后台C#代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class DengLu : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
testDataContext context = new testDataContext();
//取值
string uid = txtUid.Text;
string pwd = txtPwd.Text;
//查询
var query = context.Login.Where(p => p.UserName == uid && p.Password == pwd);
if (query.Count() > 0)
{
Session["uid"] = uid;
//跳转页面
Response.Redirect("Main.aspx");
}
else
{
Literal1.Text = "<script type='text/javascript'>alert('用户名或密码错误!');</script>";
}
}
}
网页显示：
