前台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>
<style>
.dl {
margin:0px auto;
padding:0px;
left:400px;
304px ;
height:358px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div class="dl">
<h2> </h2>
<h2> 登录界面</h2>
<p> </p>
<p>
<asp:Label ID="Label1" runat="server" Text="用户名:"></asp:Label>
<asp:TextBox ID="txtUserName" runat="server"></asp:TextBox>
</p>
<p> </p>
<p>
<asp:Label ID="Label2" runat="server" Text="密码:"></asp:Label>
<asp:TextBox ID="txtPassWork" runat="server"></asp:TextBox>
</p>
<p> </p>
<p> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="登录" />
<asp:Literal ID="Literal1" runat="server"></asp:Literal>
</p>
</div>
</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 = txtUserName.Text;
string pwd = txtPassWork.Text;
//查数据库 查询这两条数据是否跟数据库匹配
var query = context.Users.Where(p => p.UserName == uid && p.PassWord == pwd);
//判断集合里面数据的条数
if (query.Count() > 0)
{
//如果用户名和密码正确 再看一下状态
//取出这条数据
int state = query.First().State;
if (state == 0)
{
Literal1.Text = "<script type='text/javascript'>alert('用户名未审核');</script>";
}
else if (state == 1)
{
//再session里面存上用户名
Session["uid"] = uid;
Response.Redirect("Main.aspx");
}
else
{
Literal1.Text = "<script type='text/javascript'>alert('用户名审核失败');</script>";
}
//再session里面存上用户名
//Session["uid"] = uid;
//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：
