6. Asp.net 中的Cookie

Cookie是记录客户端的一些信息,是用户要求记录的。但它是和服务端相连的,向服务器请求的时候除了发送表单参数外还会把与站点相关的所有Cookie提交给服务器,这是强制性的,服务器会把修改后的cookie值返回给浏览器并更新本地的cookie。

cookie也是键/值对,以下为读写的操作。

在asp.net 中设置cookie的操作为(写):

   Response.SetCookie(new HttpCookie(key,value));

读的操作为:

   Request.Cookies[key].Value;

即写的操作是由响应操作的,即Response,读的操作是浏览器请求得到的,即Request.

cookie也是不能存储过多信息,它为object类型。以下为读写操作:

1.设置cookie

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="setcookie1.aspx.cs" Inherits="setcookie1" %>

<!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>
    
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" 
            Text="设置cookie" />
    
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class setcookie1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //设置cookie用respone,即服务端向客户端写入信息
        Response.SetCookie(new HttpCookie("cookiekey",TextBox1.Text));
        Response.Redirect("readcookie1.aspx");
    }

2.读cookie

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="readcookie1.aspx.cs" Inherits="readcookie1" %>

<!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>
    
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" 
            Text="得到cookie" />
        <asp:Label ID="Label1" runat="server"></asp:Label>
    
    </div>
    </form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class readcookie1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = Request.Cookies["cookiekey"].Value;
    }
}

cookie只与它的域名有关,相同的域名在不同的浏览器中会产生不同的cookie.

 

 

posted on 2013-06-03 10:17  天上星  阅读(265)  评论(0编辑  收藏  举报

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