在Web的开发过程中，避免不了要使用cookie,在这里，我们在前台设置cookie，也可以在后台设置cookie，关键是在前后台设置的cookie，怎么去相互读取，代码如下:
(1) 前台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="getFrontSetCookie.aspx.cs"
Inherits="Study_JavaScript.Html.getFrontSetCookie" %>
<!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 id="Head1" runat="server">
<title>前后台Cookie的设置和相互读取</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="SM" runat="server" EnablePageMethods="true">
</asp:ScriptManager>
<div>
<input type="text" id="txtUser" />
<br />
<input type="button" id="btnSetCookie" value="设置Cookie" />
<br />
<input type="button" id="btnGetCookie" value="读取后台HttpCookie设置的Cookie" />
</div>
</form>
</body>
</html>
<script type="text/javascript">
document.getElementById("btnSetCookie").onclick = function() {
document.cookie = "UserName=" + document.getElementById("txtUser").value;
PageMethods.getCookie(getCookie_Success)
};
function getCookie_Success(Result) {
alert(Result);
}
document.getElementById("btnGetCookie").onclick = function() {
PageMethods.setCookie(setCookie_Success);
};
function setCookie_Success(Result) {
if (Result) {
alert(document.cookie);
}
}
</script>
(2) 后台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
namespace Study_JavaScript.Html
{
public partial class getFrontSetCookie : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
/// <summary>
/// 利用Request.Cookies[""]读取前台通过document.cookie设置的cookie
/// </summary>
/// <returns></returns>
[WebMethod]
public static string getCookie()
{
var cook = HttpContext.Current.Request.Cookies["UserName"].Value;
HttpCookie houtai = new HttpCookie("houtai");
houtai.Value = "这是后台设置的Cookie";
return "Cookie读取成功,前台设置的Cookie为" + cook;
}
/// <summary>
/// 后台利用HttpCookie设置Cookie，在前台通过document.cookie读取
/// </summary>
/// <returns></returns>
[WebMethod]
public static bool setCookie()
{
HttpCookie houtai = new HttpCookie("houtai");
houtai.Value = "jackie";
HttpContext.Current.Response.Cookies.Add(houtai);
return true;
}
}
}
总结:(1) 红色部分为后台读取前台设置的cookie的方法.
(2) 蓝色部分为前台读取后台设置的cookie的方法,如果后台设置多个cookie的话，前台通过document.cookie读取的就是全部的。
(1) 前台代码
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="getFrontSetCookie.aspx.cs"
Inherits="Study_JavaScript.Html.getFrontSetCookie" %>
<!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 id="Head1" runat="server">
<title>前后台Cookie的设置和相互读取</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="SM" runat="server" EnablePageMethods="true">
</asp:ScriptManager>
<div>
<input type="text" id="txtUser" />
<br />
<input type="button" id="btnSetCookie" value="设置Cookie" />
<br />
<input type="button" id="btnGetCookie" value="读取后台HttpCookie设置的Cookie" />
</div>
</form>
</body>
</html>
<script type="text/javascript">
document.getElementById("btnSetCookie").onclick = function() {
document.cookie = "UserName=" + document.getElementById("txtUser").value;
PageMethods.getCookie(getCookie_Success)
};
function getCookie_Success(Result) {
alert(Result);
}
document.getElementById("btnGetCookie").onclick = function() {
PageMethods.setCookie(setCookie_Success);
};
function setCookie_Success(Result) {
if (Result) {
alert(document.cookie);
}
}
</script>
(2) 后台代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
namespace Study_JavaScript.Html
{
public partial class getFrontSetCookie : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
/// <summary>
/// 利用Request.Cookies[""]读取前台通过document.cookie设置的cookie
/// </summary>
/// <returns></returns>
[WebMethod]
public static string getCookie()
{
var cook = HttpContext.Current.Request.Cookies["UserName"].Value;
HttpCookie houtai = new HttpCookie("houtai");
houtai.Value = "这是后台设置的Cookie";
return "Cookie读取成功,前台设置的Cookie为" + cook;
}
/// <summary>
/// 后台利用HttpCookie设置Cookie，在前台通过document.cookie读取
/// </summary>
/// <returns></returns>
[WebMethod]
public static bool setCookie()
{
HttpCookie houtai = new HttpCookie("houtai");
houtai.Value = "jackie";
HttpContext.Current.Response.Cookies.Add(houtai);
return true;
}
}
}
总结:(1) 红色部分为后台读取前台设置的cookie的方法.
(2) 蓝色部分为前台读取后台设置的cookie的方法,如果后台设置多个cookie的话，前台通过document.cookie读取的就是全部的。