asp.net cookie

 1 HttpCookie ck = Request.Cookies["cktest"];
 2              if (ck == null)
 3               {
 4                  ck = new HttpCookie("cktest");
 5                  ck.Value = "123";
 6  
 7                  ck.Expires = DateTime.Now.AddSeconds(20);//20秒的有效期
 8                  Response.Cookies.Add(ck);
 9                  Response.Write("new ck");
10              }
11              else
12               {
13                  Response.Write(ck.Value.ToString());
14              }
15 
 
1、定义Cookie : HttpCookie ck=new HttpCookie("cktest");
2、获取Cookie : Request.Cookies["cktest"];
3、添加Cookie : Response.Cookies.Add(ck);