我使用以下代码在我的asp.net mvc(C#)应用程序中设置一个cookie：
public static void SetValue(string key,string value,DateTime expires)
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
_request = httpContext.Request;
_response = httpContext.Response;
HttpCookie cookie = new HttpCookie(key,value) { Expires = expires };
_response.Cookies.Set(cookie);
}
我需要在用户点击注销时删除Cookie。设置的Cookie不是使用清除/删除删除/删除。代码如下：
public static void Clear()
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
_request = httpContext.Request;
_response = httpContext.Response;
_request.Cookies.Clear();
_response.Cookies.Clear();
}
public static void Remove(string key)
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
_request = httpContext.Request;
_response = httpContext.Response;
if (_request.Cookies[key] != null)
{
_request.Cookies.Remove(key);
}
if (_response.Cookies[key] != null)
{
_response.Cookies.Remove(key);
}
}
我已经尝试了两个以上的功能，但仍然cookie存在，当我尝试检查存在。
public static bool Exists(string key)
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
_request = httpContext.Request;
_response = httpContext.Response;
return _request.Cookies[key] != null;
}
解决方法
清除响应的Cookie不会指示浏览器清除Cookie，它只是不会将Cookie发送回浏览器。要指示浏览器清除Cookie，您需要告诉它Cookie已过期，例如
public static void Clear(string key)
{
var httpContext = new HttpContextWrapper(HttpContext.Current);
_response = httpContext.Response;
HttpCookie cookie = new HttpCookie(key)
{
Expires = DateTime.Now.AddDays(-1) // or any other time in the past
};
_response.Cookies.Set(cookie);
}
