在程序開發中，使用Cookie時，很少使用如http://www.ythuaji.com.cn/article/20644.html的寫法。習慣寫成Cookie集合，什么叫做Cookie集合，即是說一個Cookie，它擁有多個值。下面一系列演示，是怎樣創建Cookie集合與使用。 

復制代碼代碼如下:

InsusBiz 
using System; 
using System.Web; 
/// <summary> 
/// Summary description for InsusBiz 
/// </summary> 
public class InsusBiz 
{ 
private static HttpResponse Response 
{ 
get 
{ 
return HttpContext.Current.Response; 
} 
} 
private static HttpRequest Request 
{ 
get 
{ 
return HttpContext.Current.Request; 
} 
} 
//定義一個Cookie集合 
private static HttpCookie InsusCookie 
{ 
get 
{ 
return Request.Cookies["InsusCookie"] as HttpCookie; 
} 
set 
{ 
if (Request.Cookies["InsusCookie"] != null) 
{ 
Request.Cookies.Remove("InsusCookie"); 
} 
Response.Cookies.Add(value); 
} 
} 
//New Cookie集合 
private static HttpCookie NewInsusCookie 
{ 
get 
{ 
HttpCookie httpCookie = new HttpCookie("InsusCookie"); 
return httpCookie; 
} 
} 
//Remove Cookie集合 
public static void RemoveInsusCookie() 
{ 
if (InsusCookie == null) 
Response.Cookies.Remove("InsusCookie"); 
else 
Response.Cookies["InsusCookie"].Expires = DateTime.Now.AddDays(-1); 
} 
//創建一個Cookie，判斷用戶登錄狀態 
public static bool LoginOk 
{ 
get 
{ 
return InsusCookie == null ? false : bool.Parse(InsusCookie.Values["LoginOk"]); 
} 
set 
{ 
HttpCookie httpCookie = InsusCookie == null ? NewInsusCookie : InsusCookie; 
httpCookie.Values["LoginOk"] = value.ToString(); 
InsusCookie = httpCookie; 
} 
} 
//創建登錄用戶的帳號,整站使用 
public static string MemberId 
{ 
get 
{ 
return InsusCookie == null ? string.Empty : InsusCookie.Values["MemberId"]; 
} 
set 
{ 
HttpCookie httpCookie = InsusCookie == null ? NewInsusCookie : InsusCookie; 
httpCookie.Values["MemberId"] = value; 
InsusCookie = httpCookie; 
} 
} 
//如果還有整站使用的Cookie可以寫在此，可以參考LoginOK或MemberId的寫法。 
} 

在應用時，你會看到InsusBiz類別下有LoginOk，MemberId和RemoveInsusCookie等屬性： 
 
在程序中怎樣使用這些cookie呢？如在登錄驗證成功之后，你需要把登錄狀態與登錄的ID寫入Cookie中 
InsusBiz.LoginOk = true; 
InsusBiz.MemberId = xxx; 
在判斷用戶是否登錄時，可以這個去判斷： 

復制代碼代碼如下:

protected void Page_Load(object sender, EventArgs e) 
{ 
if (!InsusBiz.LoginOk) 
{ 
//你沒有登錄 
} 
} 

如果想在任何位置，想取出登錄ID: 

復制代碼代碼如下:

string memberId = InsusBiz.MemberId; 

最后想說的，你想移除Cooke,就可以使用InsusBiz.RemoveInsusCookie就可以了，因為它會把Cookie的過期時間變更為過去。這個通常應用在用戶Sign out的事件上。