Cookie (HttpCookie的實例)提供了一種在 Web 應用程序中存儲用戶特定信息的方法。例如,當用戶訪問您的站點時,您可以使用 Cookie 存儲用戶首選項或其他信息。當該用戶再次訪問您的網站時,應用程序便可以檢索以前存儲的信息。
創建Cookie方法 (1)
Response.Cookies["userName"].Value = “admin";
Response.Cookies[“userName”].Expires = DateTime.Now.AddDays(1);
//如果不設置失效時間,Cookie信息不會寫到用戶硬盤,瀏覽器關閉將會丟棄。
創建Cookie方法 (2)
HttpCookie aCookie = new HttpCookie(“lastVisit”); //上一次訪問時間
aCookie.Value = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);
訪問Cookie方法(1)
if(Request.Cookies["userName"] != null) Label1.Text = Server.HtmlEncode(Request.Cookies["userName"].Value);訪問Cookie方法(2)
if(Request.Cookies["userName"] != null)
{ HttpCookie aCookie = Request.Cookies["userName"]; Label1.Text = Server.HtmlEncode(aCookie.Value);
}
創建多值Cookie方法 (1)
Response.Cookies["userInfo"]["userName"] = “admin";
Response.Cookies["userInfo"]["lastVisit"] = DateTime.Now.ToString();
Response.Cookies["userInfo"].Expires = DateTime.Now.AddDays(1);
創建多值Cookie方法 (2)
HttpCookie aCookie = new HttpCookie("userInfo");
aCookie.Values["userName"] = “admin";
aCookie.Values["lastVisit"] = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);
讀取多值Cookie?
HttpCookie aCookie = Request.Cookies["userInfo"];
string userName=aCookie.Values[“userName”];
string lastVisit=aCookie.Values[“lastVisit”];
修改和刪除Cookie
不能直接修改或刪除Cookie,只能創建一個新的Cookie,發送到客戶端以實現修改或刪除Cookie.
轉帖地址:http://dev.firnow.com/course/4_webprogram/asp.net/asp_netshl/2008430/112167.html