asp.net的Cookie写入与读取

asp.net的Cookie写入与读取

1、什么是Cookie？

一段文本数据，默认存储在客户端，一种存放在浏览器缓存，一种存放在磁盘，最大可存储4kb。

2、怎么写入Cookie和读取Cookie？

（1）写入Cookie

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            //写入cookie
            HttpCookie nc = new HttpCookie("newcookie");
            nc.Values["name"] = "ZhouXingXing";
            nc.Values["age"] = "27";
            nc.Values["dt"] = DateTime.Now.ToString();
            Response.Cookies.Add(nc);
            Response.Write("Cookie写入成功!");
        }
    }
}
    

（2）读取Cookie

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication2
{
    public partial class WebForm2 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button22_Click(object sender, EventArgs e)
        {
            //读取Cookie
            HttpCookie getcook = Request.Cookies["newcookie"];
            Response.Write((getcook.Values["name"]));
            Response.Write("<br>" + getcook.Values["age"]);
            Response.Write("<br>" + getcook.Values["dt"]);
        }
    }
}