.net清除cookie代碼|.net為什麼不能清除cookie|.net cookie 到期代碼

 this.Response.Cookies["adminusers"].Expires = DateTime.Now.AddDays(-1); 
Response.Cookies.Add(Request.Cookies["adminusers"]);

  Response.Redirect("/login.aspx");

為什麼不能設定到期呢是因為你沒寫入用戶端把cookie

Response.Cookies.Add(Request.Cookies["adminusers"]);

這就話就是把cookie寫回用戶端

只有加這句才好用

不行的用以下的代碼清楚全部的cookie

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); 
}