Response.cookies和Request.cookies

Response.cookies和Request.cookies的区别很重要,由于方法基本都是差不多的,特别对于初学者而言,很容易出现混淆。 
简单说就是创建cookie用response,获取cookie值用request。

下面是创建cookie的代码

方法一:
Response.Cookies["userName"].Value = "patrick";
Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);
方法二:使用HttpCookie类
HttpCookie aCookie = new HttpCookie("lastVisit");
aCookie.Value = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);

 以下是读取cookie值的代码

if(Request.Cookies["userName"] != null)
    Label1.Text = Server.HtmlEncode(Request.Cookies["userName"].Value);

if(Request.Cookies["userName"] != null)
{
    HttpCookie aCookie = Request.Cookies["userName"];
    Label1.Text = Server.HtmlEncode(aCookie.Value);
}



Response.Cookies用于向客户端写cookie的。(输出到客户,所以定义到Response这个对象里。)
Request.Cookies用于向客户端读cookie的。(从客户端获取,所以定义到Request这个对象里。)
因为cookie是存储在客户端,所以服务器端是没法删除的,必须通知客户端去删除,一般是设计过期时间。



C#中对cookie的操作

  保存cookie
                    HttpCookie cookie = new HttpCookie("userinfo");
                    cookie["userid"] = user.ID.ToString();
                    cookie["username"] = user.UserName;
                    //设置cookie的保存事件 (天)为单位
                    cookie.Expires = DateTime.Now.AddDays(1);
                    Response.Cookies.Add(cookie);

  读取cookie

            HttpCookie cookie = Request.Cookies["userinfo"];
            int userid = int.Parse(cookie["userid"].ToString());

 





推荐传送门:http://www.cnblogs.com/Darren_code/archive/2011/11/24/Cookie.html
传送门:http://blog.csdn.net/u014390849/article/details/51790943
posted @ 2018-01-10 17:32  Aminor~  阅读(433)  评论(0编辑  收藏  举报