在程序中使用Cookie集合(定义/新建/删除)及案例讲解

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; 
} 
} 
//定义一个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); 
} 
//创建一个Cookie，判断用户登录状态 
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; 
} 
} 
//创建登录用户的帐号,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; 
} 
} 
//如果还有整站使用的Cookie可以写在此，可以参考LoginOK或MemberId的写法。 
} 
 
在应用时，你会看到InsusBiz类别下有LoginOk，MemberId和RemoveInsusCookie等属性： 
 
在程序中怎样使用这些cookie呢？如在登录验证成功之后，你需要把登录状态与登录的ID写入Cookie中 
InsusBiz.LoginOk = true; 
InsusBiz.MemberId = xxx; 
在判断用户是否登录时，可以这个去判断： 
 代码如下:

protected void Page_Load(object sender, EventArgs e) 
{ 
if (!InsusBiz.LoginOk) 
{ 
//你没有登录 
} 
} 
 
如果想在任何位置，想取出登录ID: 
 代码如下:

string memberId = InsusBiz.MemberId; 
 
最后想说的，你想移除Cooke,就可以使用InsusBiz.RemoveInsusCookie就可以了，因为它会把Cookie的过期时间变更为过去。这个通常应用在用户Sign out的事件上。