程序中保存状态的方式之 Cookies，之前写过一篇关于ViewState的。现在继续总结Cookies方式的
新建的测试页面login
<%@ Page Language="C#" AutoEventWireup="true" 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> <script type="text/javascript"> function checkSubmit() { var user = document.getElementById("txtName"); var reg = /^s*$/; if (reg.test(user.value)) { alert("请输入用户名！"); user.focus(); return false; } var pwd = document.getElementById("txtPwd"); if (reg.test(pwd.value)) { alert("请输入密码！"); pwd.focus(); return false; } return true; } </script> </head> <body> <form id="form1" runat="server"> 登录名：<asp:TextBox ID="txtName" runat="server"></asp:TextBox> 密码：<asp:TextBox ID="txtPwd" runat="server"></asp:TextBox> <asp:Button ID="btn_login" runat="server" Text="登录" onclick="btn_login_Click" OnClientClick="return checkSubmit()"/> </form> </body> </html>
后台.cs文件
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; public partial class Login : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btn_login_Click(object sender, EventArgs e) { string name = txtName.Text.Trim(); string pwd = txtPwd.Text.Trim(); if (name == string.Empty) { MessageBox.Show(this, "请输入用户名！"); return; } if (pwd == string.Empty) { MessageBox.Show(this, "请输入密码！"); return; } if (name == "test" && pwd == "123456") { Response.Cookies.Add(new HttpCookie("comID", "100")); Response.Cookies["comID"].Expires = DateTime.Now.AddDays(30);//设置过期时间,30天 Response.Redirect("获取cookies.aspx"); } else { MessageBox.Show(this,"用户名密码错误！"); } } }
获取cookies.aspx页面后台
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; public partial class 获取cookies : System.Web.UI.Page { public string comid = ""; protected void Page_Load(object sender, EventArgs e) { if (Request.Cookies["comID"] != null && Request.Cookies["comID"].Value != "") { comid = Request.Cookies["comID"].Value;//获取存入的comid } MessageBox.Show(this, "登录id=" + comid); } }
删除Cookies
Response.Cookies[CountAdmin].Expires = DateTime.Now.AddDays(-1);//删除cookie
我登录的时候存入了100，访问login.aspx就会跳转到获取cookies页面，提示登录id=100,效果图如下：
