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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