C#中Cookies的存取删除，前台使用jquery.cookie操作cookie

        /// <summary>
        /// Cookies赋值
        /// </summary>
        /// <param name="strName">主键</param>
        /// <param name="strValue">键值</param>
        /// <param name="strDay">有效天数,如果不要此参数,cookie在浏览器关闭的时候自动失效</param>
        /// <returns></returns>
        public static bool SetCookie(string strName, string strValue, int strDay = 0)
        {
            try
            {
                HttpCookie Cookie = new HttpCookie(strName);
                //Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
                if (strDay > 0)
                {
                    Cookie.Expires = DateTime.Now.AddDays(strDay);
                }
                Cookie.Value = HttpUtility.UrlEncode(strValue);
                System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
                return true;
            }
            catch
            {
                return false;
            }
        }

        /// <summary>
        /// 读取Cookies
        /// </summary>
        /// <param name="strName">主键</param>
        /// <returns></returns>
        public static string GetCookie(string strName)
        {
            HttpCookie Cookie = System.Web.HttpContext.Current.Request.Cookies[strName];
            if (Cookie != null)
            {
                return HttpUtility.UrlDecode(Cookie.Value);
            }
            else
            {
                return null;
            }
        }

        /// <summary>
        /// 删除Cookies
        /// </summary>
        /// <param name="strName">主键</param>
        /// <returns></returns>
        public static bool DelCookie(string strName)
        {
            try
            {
                HttpCookie Cookie = new HttpCookie(strName);
                //Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com
                Cookie.Expires = DateTime.Now.AddYears(-10);
                System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);
                return true;
            }
            catch
            {
                return false;
            }
        }

示例：

            SetCookie("name", "aaa", 1);//赋值，有效期为1天
            GetCookie("name");//取值
            DelCookie("name");//删除

另外：只要不给cookie设置过期时间,cookie在浏览器关闭的时候自动失效

jQuery操作cookie的插件,大概的使用方法如下

$.cookie('the_cookie'); //读取Cookie值
$.cookie(’the_cookie’, ‘the_value’); //设置cookie的值
$.cookie('the_cookie', 'the_value', { expires: 7 });
$.cookie('the_cookie', 'the_value', { expires: 7, path: '/' });
//新建一个cookie 包括有效期 路径 域名等
$.cookie(’the_cookie’, ‘the_value’, {expires: 7, path: ‘/’, domain: ‘jquery.com’, secure: true});
$.cookie(’the_cookie’, ‘the_value’); //新建cookie
$.cookie(’the_cookie’, null); //删除一个cookie
$.removeCookie('the_cookie');
$.removeCookie('the_cookie', { path: '/' });

更多参考：https://github.com/carhartl/jquery-cookie

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