在ASP.net内核中通过静态类访问Cookie

using System;
using System.Web;

public static class CookieHelper
{
    public static void SetCookie(string name, string value, int expireDays)
    {
        HttpCookie cookie = new HttpCookie(name, value);
        cookie.Expires = DateTime.Now.AddDays(expireDays);
        HttpContext.Current.Response.Cookies.Add(cookie);
    }

    public static string GetCookie(string name)
    {
        HttpCookie cookie = HttpContext.Current.Request.Cookies[name];
        return cookie != null ? cookie.Value : null;
    }

    public static void DeleteCookie(string name)
    {
        HttpCookie cookie = HttpContext.Current.Request.Cookies[name];
        if (cookie != null)
        {
            cookie.Expires = DateTime.Now.AddDays(-1);
            HttpContext.Current.Response.Cookies.Add(cookie);
        }
    }
}

// 设置Cookie
CookieHelper.SetCookie("username", "John", 7);

// 获取Cookie
string username = CookieHelper.GetCookie("username");

// 删除Cookie
CookieHelper.DeleteCookie("username");