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<limit; i++)
{
cookieName = Request.Cookies[i].Name;
aCookie = new HttpCookie(cookieName);
aCookie.Expires = DateTime.Now.AddDays(-1);
Response.Cookies.Add(aCookie);
}