js从cookies里面取值的简单实现.doc
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js从Cookies里面取值的简单实现
遇到一个Js从Cookies里面取值的需求，Js貌似没有现成的方法可以指定Key值获取Cookie里面对应的值，参阅网上的代码，简单实现如下：
1. 服务端代码，Page_Load里面Cookies写入几个值
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using System;
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using System.Collections.Generic;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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namespace WebApplication_TestJS
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{
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public partial class _Default : System.Web.UI.Page
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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Response.Cookies[DONO].Value = EDO1406300001;
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Response.Cookies[DOID].Value = ABCDEFG123456;
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Response.Cookies[DOSOURCE].Value = WUWUWUWU;
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Response.Cookies[DOTYPE].Value = 2;
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}
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}
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}
2. 客户端代码，页面添加按钮和文本框，用于触发和输出获取到的值
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%@ Page Language=C# AutoEventWireup=true CodeBehind=Default.aspx.cs Inherits=WebApplication_TestJS._Default %
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html
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script language=javascript type=text/javascript
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function GetCookie()
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{
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/*获取Cookies里面存放信息 了解其字符串结构*/
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var Cookies = document.cookie;
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document.getElementById(%=txtContent.ClientID%).innerText = Cookies;
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/*处理字符串截取出来需要的目标值*/
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var target = DONO + =;
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if (document.cookie.length 0)
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{
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start = document.cookie.indexOf(target);
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if (start != -1)
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{
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start += target.length;
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end = document.cookie.indexOf(;, start);
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if (end == -1) end = document.cookie.length;
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}
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}
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/*目标值赋值给控件*/
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document.getElementById(%=txtTarget.ClientID%).innerText = document.cookie.substring(start, end);
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}
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/script
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head runat=server
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title/title
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/head
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body
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form id=form1 runat=server
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div
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asp:Button ID=btnGetReq runat=server Text=获取内容 OnClientClick=GetCookie() /
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br /
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asp:TextBox ID=txtContent runat=server Columns=120/asp:TextBox
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br /
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asp:TextBox ID=txtTarget runat=server Columns=120/asp:TextBox
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/div
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/form
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/body
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/html
3.执行结果，可以看到Cookies根据需要截取相应字符串即可
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