无法获取Cookie值（NameValueCollection）-ASP.NET MVC

Question

I used belowe code to add cookie , I add some key, value in cookie ,

 public static void AddCookie(this HttpContextBase httpContextBase, string cookieName, NameValueCollection cookieValues, DateTime expires, bool httpOnly = false)
    {
        var cookie = new HttpCookie(cookieName)
        {
            Expires = expires,
            //Value = httpContextBase.Server.UrlEncode(value),// For Cookies and Unicode characters
            HttpOnly = httpOnly
        };

        cookie.Values.Add(cookieValues);
        //httpContextBase.Response.Cookies.Add(cookie);
        System.Web.HttpContext.Current.Response.Cookies.Add(cookie);
    }

and fill keys like this :

NameValueCollection CookieValues = new NameValueCollection();
                CookieValues.Add("pid", shoppingCartViewModel.ProductId.ToString());
                CookieValues.Add("qty", "1");
                HttpContext.AddCookie(shoppingCartCookiName, CookieValues, DateTime.Now.AddDays(1));

when I want read cookie , Values are null . I used belowe code to check Cookie Value

 public static NameValueCollection GetCookieValues(this HttpContextBase httpContext, string cookieName)
    {
        var cookie = System.Web.HttpContext.Current.Response.Cookies[cookieName];
        if (cookie == null)
            return null; //cookie doesn't exist

        // For Cookies and Unicode characters
        return cookie.Values;
    }

Answer 1

You need to use Request.Cookies not Response.Cookies while reading the cookie.

Instead of

System.Web.HttpContext.Current.Response.Cookies[cookieName]

Use

System.Web.HttpContext.Current.Request.Cookies[cookieName]

In a web application the request is what comes from the browser and the response is what the server sends back. While reading cookie data from the browser you should use the Request.Cookies. When you are constructing cookies to be sent to the browser you need to add them to Response.Cookies.

Answer 2

用这个。

HttpCookie cookie = HttpContext.Request.Cookies.Get("name");