cookie的创建与清除

   1.创建名为 userid 的 cookie

   HttpCookie cookie = new HttpCookie("userid");  //设置cookie的名称
   cookie.Value = ((Maticsoft.Model.Personal)Session["person"]).userID.ToString(); //为cookie赋值
   cookie.Expires = DateTime.Now.AddDays(7); //设置cookie过期时间
   Response.Cookies.Add(cookie); //保存cookie

 

   2.清除cookie

    HttpCookie cookie = Request.Cookies["userid"];
    if (cookie != null && int.Parse(cookie.Value) > 3)
    {
        HttpCookie cookieNew = new HttpCookie("userid");

        cookie.Expires = DateTime.Now.AddDays(-1);
        Response.Cookies.Add(cookieNew);

    }

    注意： userid就是要清除的cookie名

   3.接受cookie

   if(Request.Cookies["userName"] != null)

      {

           textbox1.visible=false;

      }