[轉貼] C#使用Cookie方法

出處：http://www.cnblogs.com/vebest/archive/2011/08/31/2161326.html

        //寫入
        protected void Button1_Click(object sender, EventArgs e)
        {
            HttpCookie cookie = new HttpCookie("MyCook");//初始化並設置Cookie的名稱
            DateTime dt = DateTime.Now;
            TimeSpan ts = new TimeSpan(0, 0, 1, 0, 0);//過期時間為1分鐘
            cookie.Expires = dt.Add(ts);//設置過期時間
            cookie.Values.Add("userid", "userid_value");
            cookie.Values.Add("userid2", "userid2_value2");
            Response.AppendCookie(cookie);
            //輸出該Cookie的所有內容
            //Response.Write(cookie.Value);//輸出為：userid=userid_value&userid2=userid2_value2
        }

        //讀取
        protected void Button2_Click(object sender, EventArgs e)
        {

            // HttpCookie cokie = new HttpCookie("MyCook");//初始化
            if (Request.Cookies["MyCook"] != null)
            {
                //Response.Write("Cookie中鍵值為userid的值:" + Request.Cookies["MyCook"]["userid"]);//整行
                //Response.Write("Cookie中鍵值為userid2的值" + Request.Cookies["MyCook"]["userid2"]);
                Response.Write(Request.Cookies["MyCook"].Value);  //輸出全部的值
            }
        }

        //修改Cookie
        protected void Button3_Click(object sender, EventArgs e)
        {
            //獲取客戶端的Cookie對象
            HttpCookie cok = Request.Cookies["MyCook"];

            if (cok != null)
            {
                //修改Cookie的兩種方法
                cok.Values["userid"] = "alter-value";
                cok.Values.Set("userid", "alter-value");

                //往Cookie裡加入新的內容
                cok.Values.Set("newid", "newValue");
                Response.AppendCookie(cok);
            }
        }

        //刪除Cookie
        protected void Button4_Click(object sender, EventArgs e)
        {

            HttpCookie cok = Request.Cookies["MyCook"];
            if (cok != null)
            {
                if (!true)  //CheckBox1.Checked
                {
                    cok.Values.Remove("userid");  //移除鍵值為userid的值
                }
                else
                {
                    TimeSpan ts = new TimeSpan(-1, 0, 0, 0);
                    cok.Expires = DateTime.Now.Add(ts);  //刪除整個Cookie，只要把過期時間設置為現在
                }
                Response.AppendCookie(cok);
            }
        }

***************************************************************************************************************

            HttpCookie addCookie = new HttpCookie("mycookie");
            //添加cookie的key值
            addCookie.Values.Add("name", "hsj");

            var cookie = Request.Cookies["mycookie"];
            if (cookie != null && cookie.HasKeys)
            {
                //獲取cookie中key的兩種方法
                var name1 = cookie["name"];
                var name2 = cookie.Values["name"];
                if (name1 != "hsj")
                {
                    //設置cookie中key的兩種方法
                    cookie.Values["name"] = "zhangsan";
                    cookie.Values.Set("name", "lishi");
                }
            }
            //更新cookie中現有的值
            Response.SetCookie(cookie);
            //將cookie添加到http respose中
            Response.AppendCookie(addCookie);