二级域名Cookie的问题及解决方法2

用httpmodule在所有的处理过程之后，集中把问题一次性解决掉。

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// CorrectCookieDomainModule 的摘要说明
/// </summary>
public class CorrectCookieDomainModule:IHttpModule//继承IHttpModule接口
{
public CorrectCookieDomainModule()
{
}

#region IHttpModule 成员

public void Dispose() { }

public void Init(HttpApplication context)
{
//在Init中订阅事件
context.EndRequest += new EventHandler(context_EndRequest);
}

/// <summary>
/// 在HTTP执行管线的最末端更正Cookie的Domain
/// </summary>
void context_EndRequest(object sender, EventArgs e)
{
HttpContext context = ((HttpApplication)sender).Context;

string domain = ".cnblogs.com";
string cookieName = FormsAuthentication.FormsCookieName;
HttpCookie cookie = context.Response.Cookies[cookieName];
if (cookie != null)
{
//将Cookie的Domain更改为.cnblogs.com
//这样就使Cookie能共享于所有的二级域名
cookie.Domain = domain;

}
}

#endregion
}

在web。config中配置

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<system.web>
<compilation debug="true"/>
<httpModules>
<add name="CorrectCookieDomainModule" type="CustomComponents.CorrectCookieDomainModule"/>
</httpModules>
<authentication mode="Windows"/>
</system.web>
</configuration>