asp.net-mvc - Cookie 未删除

Question

我使用以下代码在我的 asp.net mvc(C#) 应用程序中设置 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);
}

当用户单击注销时，我需要删除 cookie。设置的 cookie 不会通过清除/删除来删除/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);
    }
}

我已经尝试了上述两个功能，但当我尝试检查是否存在时，cookie仍然存在。

public static bool Exists(string key)
{
    var httpContext = new HttpContextWrapper(HttpContext.Current);
    _request = httpContext.Request;
    _response = httpContext.Response;
    return _request.Cookies[key] != null;
}

这里可能有什么问题？或者我需要做什么来删除/删除 cookie？

Answer 1

清除响应的 cookie 并不指示浏览器清除 cookie，它只是不将 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);
}