1、创建Cookies有两种方法：

Response.Cookies["userName"].Value = "patrick";Response.Cookies["userName"].Expires = DateTime.Now.AddDays(1);

HttpCookie aCookie = new HttpCookie("lastVisit");aCookie.Value = DateTime.Now.ToString();aCookie.Expires = DateTime.Now.AddDays(1);Response.Cookies.Add(aCookie);

2、读取Cookie

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);}

3、修改和删除Cookie

int counter;if (Request.Cookies["counter"] == null)    counter = 0;else{    counter = int.Parse(Request.Cookies["counter"].Value);}counter++;Response.Cookies["counter"].Value = counter.ToString();Response.Cookies["counter"].Expires = DateTime.Now.AddDays(1);

一定要注意设置Cookies是用Response读取是用Request两者不一样！

删除Cookie

string subkeyName;subkeyName = "userName";HttpCookie aCookie = Request.Cookies["userInfo"];aCookie.Values.Remove(subkeyName);aCookie.Expires = DateTime.Now.AddDays(1);Response.Cookies.Add(aCookie);

HttpCookie aCookie;string cookieName;int limit = Request.Cookies.Count;for (int i=0; i