关于Asp.net应用中cookie的问题处理 dodo

1、在应用程序中有时会出现cookie混乱的问题，主要问题在RemoveCookie上，解决办法：

 

       /// <summary>

       /// 移除cookie,将Request和Response两个集合中的都清理

       ///  Code by KentLi

       /// </summary>

       /// <param name="cookieName">cookie名称</param>

      public void RemoveCookie(string cookieName)

      {

        

              HttpCookie Cookie =  HttpContext.Current.Request.Cookies[cookieName];

              if (Cookie != null)

              {
                    //过期时间设置为立即过期        

                     Cookie.Expires=  DateTime.Now;

                     HttpContext.Current.Request.Cookies.Remove(cookieName);

              }

 

              Cookie =  HttpContext.Current.Response.Cookies[cookieName];

              if (Cookie != null)

              {
                    

                     Cookie.Expires=  DateTime.Now;

                     HttpContext.Current.Response.Cookies.Remove(cookieName);

              }

      }

 

              public void appendcook(string cookies,string cookiesvalue,int days)

              {

                     HttpCookie usercookie=new HttpCookie(cookies,cookiesvalue);

                    usercookie.Expires = DateTime.Now.AddDays(days);

                     HttpContext.Current.Response.Cookies.Add(usercookie);

              }

 

2、中文cookie的问题，在Windows 2000正常，在Windows 2003有时会不正常(几率很小，但的确存在)，采用：

Server.UrlEncode();  

Server.UrlDecode();

编码和解码。

 

 

 

Cookie["MyCookie"] = Server.UrlEncode("中文")

Response.Write(Server.UrlDecode(Request.Cookies("MyCookie").Value()))

 

 

3.彻底删除cookie

 protected void DeleteCookie(string cookieName)
{
   if (Request.Cookies[cookieName] != null)
{
    HttpCookie cookie = new HttpCookie(cookieName);
    cookie.Expires = DateTime.Now.AddDays(-1);
    Response.AppendCookie(cookie);//这句很重要
}
}

 

http://support.microsoft.com/default.aspx?scid=kb;en-us;313282

 

更多Cookie的相关知识

 

HttpContext.Current.Response.Cookies

HttpContext.Current.Request.Cookies

 

分别是需要写回用户客户端和从用户客户端读取的Cookie集合。

当修改Cookie的时候，为了保证同一个Asp.net 页面能访问修改后的Cookie，就必须同时修改这两个集合中的Cookie。

 

http://blog.joycode.com/ghj/archive/2003/11/06/5647.aspx

http://west-wind.com/weblog/posts/1006.aspx

http://www.derkeiler.com/Newsgroups/microsoft.public.inetserver.iis.security/2004-03/0147.html