如何读取 C# 中的 cookie？

Question

I'm not sure how to read a web cookie in C#. I tried this code, but I get multiple errors.

        private string GetCookieValue(string cookieName, string itemName)
        {
            var CookieName = "MY_COOKIE";
            var CookieValue = string.empty;
                                //     ^ error

            HttpCookie myCookie = Request.Cookies[CookieName];
            // ^ error              // ^ error           
            if (myCookie == null) 

            {
                return "No Cookie Found.";
            }


            CookieValue = myCookie.Value.ToString();

            return CookieValue;
        }

Any help would be appreciated, thanks.

(sorry about that) Errors:

line 4, 'string' does not contain a definition for 'empty' line 5, the type or namespace name 'HttpCookie' could not be found. line 5, The name Request does not exist in the current context.

Answer 1

You need to use string.Empty and not empty. For reading of cookie, see below example:

public static string GetFromCookie(string cookieName, string keyName)
{
    HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];
    if (cookie != null)
    {
        //Logic placeholder
    }
    return null;
}