Cookie的使用

寫入

    HttpCookie cookie=new HttpCookie("MyCook");//初使化并設定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);//設定過期時間

    cookie.Values.Add("userid", "userid_value");

    cookie.Values.Add("userid2","userid2_value2");

    Response.AppendCookie(cookie);

    //輸出該Cookie的所有内容

    //Response.Write(cookie.Value);//輸出為：userid=userid_value&userid2=userid2_value2

讀取

    // HttpCookie cokie = new HttpCookie("MyCook");//初使化

    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

    //擷取用戶端的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裡加入新的内容

      cok.Values.Set("newid", "newValue");

      Response.AppendCookie(cok);

    }     

删除

    HttpCookie cok = Request.Cookies["MyCook"];

      if (!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);//删除整個Cookie，隻要把過期時間設定為現在