C#Cookie處理原始碼

        #region Cookie
        /// <summary>
        /// 添加Cookie 賈世義
        /// </summary>
        /// <param name="name">名稱</param>
        /// <param name="key">鍵</param>
        /// <param name="value">值</param>
        /// <param name="days">儲存天數</param>
        public static void CookieWrite(string name, string key, string value, int days)
        {
            if (HttpContext.Current != null)
            {
                HttpCookie cookie = HttpContext.Current.Request.Cookies[name];
                if (cookie == null)
                {
                    cookie = new HttpCookie(name);
                }
                if (String.IsNullOrEmpty(key))
                {
                    cookie.Value = value;
                }
                else
                {
                    cookie[key] = value;
                }
                if (String.IsNullOrEmpty(value))
                {
                    cookie.Expires = DateTime.Now.AddDays(-1);
                }
                else
                {
                    cookie.Expires = DateTime.Now.AddDays(days);
                }
                HttpContext.Current.Response.AppendCookie(cookie);
            }
        }
        /// <summary>
        /// 取Cookie值 賈世義
        /// </summary>
        /// <param name="name">名稱</param>
        /// <param name="key">鍵 空則取cookie的值</param>
        /// <returns></returns>
        public static string CookieRead(string name, string key)
        {
            HttpCookie cookie = null;
            if (HttpContext.Current != null)
            {
                cookie = HttpContext.Current.Request.Cookies[name];
            }
            if (cookie != null)
            {
                if (String.IsNullOrEmpty(key))
                {
                    return cookie.Value;
                }
                else
                {
                    return cookie[key];
                }
            }
            return null;
        }
        /// <summary>
        /// 刪除Cookie 賈世義
        /// </summary>
        /// <param name="name"></param>
        public static void CookieRemove(string name)
        {
            if (HttpContext.Current != null)
            {
                HttpContext.Current.Request.Cookies.Remove(name);
                if (!String.IsNullOrEmpty(CookieRead(name)))
                {
                    HttpContext.Current.Request.Cookies[Constants.MYGRIDVIEW + "user"][name] = null;
                }
            }
        }
        #endregion

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