/// <summary>
        /// 创建 验证支付通知的 Model
        /// </summary>
        /// <param name="isApp">是否App应用</param>
        /// <returns></returns>
        public static WxPayModel Create()
        {
            WxPayModel wxPayModel = new WxPayModel();

            //先设置基本信息
            wxPayModel.SetAppId(WeiXinConst.AppId);
            wxPayModel.SetAppKey(WeiXinConst.PaySignKey);
            wxPayModel.SetPartnerKey(WeiXinConst.PartnerKey);
            wxPayModel.SetSignType("sha1");

            return(wxPayModel);
        }
        /// <summary>
        /// 创建 订单查询Model
        /// </summary>
        /// <param name="tradeNo">订单号</param>
        /// <param name="isApp">是否为App支付创建的,默认为是</param>
        /// <returns></returns>
        public static WxPayModel Create(string tradeNo)
        {
            WxPayModel wxPayModel = new WxPayModel();

            //先设置基本信息
            wxPayModel.SetAppId(WeiXinConst.AppId);
            wxPayModel.SetAppKey(WeiXinConst.PaySignKey);
            wxPayModel.SetPartnerKey(WeiXinConst.PartnerKey);
            wxPayModel.SetSignType("sha1");
            //设置请求package信息
            wxPayModel.SetParameter("partner", WeiXinConst.PartnerId); //注册时分配的财付通商户号 partnerId

            wxPayModel.SetParameter("out_trade_no", tradeNo);          //商户系统内部的订单号,32 个字符内、可包含字母,确保在商户系统唯一;

            return(wxPayModel);
        }
        /// <summary>
        /// 根据传入的dic 设置参数
        /// </summary>
        /// <param name="dic"></param>
        /// <param name="isApp"></param>
        /// <returns></returns>
        public static WxPayModel Create(Dictionary <string, string> dic)
        {
            WxPayModel wxPayModel = new WxPayModel();

            //先设置基本信息
            wxPayModel.SetAppId(WeiXinConst.AppId);
            wxPayModel.SetAppKey(WeiXinConst.PaySignKey);
            wxPayModel.SetPartnerKey(WeiXinConst.PartnerKey);
            wxPayModel.SetSignType("sha1");

            foreach (var key in dic.Keys)
            {
                wxPayModel.SetParameter(key, dic[key]);
            }

            return(wxPayModel);
        }
        /// <summary>
        /// 创建 支付Model
        /// </summary>
        /// <param name="description">商品描述</param>
        /// <param name="tradeNo">订单号</param>
        /// <param name="totalFee">订单金额(分为单位)</param>
        /// <param name="notifyUrl">支付完成后,接收微信通知支付结果的Url</param>
        /// <param name="createIp">用户浏览器端Ip</param>
        /// <returns></returns>
        public static WxPayModel Create(string description, string tradeNo, string totalFee, string notifyUrl, string createIp)
        {
            WxPayModel wxPayModel = new WxPayModel();

            //先设置基本信息
            wxPayModel.SetAppId(WeiXinConst.AppId);
            wxPayModel.SetAppKey(WeiXinConst.PaySignKey);
            wxPayModel.SetPartnerKey(WeiXinConst.PartnerKey);
            wxPayModel.SetSignType("sha1");
            //设置请求package信息
            wxPayModel.SetParameter("bank_type", "WX");                //固定
            wxPayModel.SetParameter("fee_type", "1");                  //取值:1(人民币) ,暂只支持 1;
            wxPayModel.SetParameter("input_charset", "UTF-8");         //
            wxPayModel.SetParameter("partner", WeiXinConst.PartnerId); //注册时分配的财付通商户号 partnerId

            wxPayModel.SetParameter("body", description);              //商品描述
            wxPayModel.SetParameter("out_trade_no", tradeNo);          //商户系统内部的订单号,32 个字符内、可包含字母,确保在商户系统唯一;
            //todo:暂时写死为 1分
            wxPayModel.SetParameter("total_fee", totalFee);            //订单总金额,单位为分;
            wxPayModel.SetParameter("notify_url", notifyUrl);          //在支付完成后,接收微信通知支付结果的URL,需给绝对路径,255字符内,格式如:http://wap.tenpay.com/tenpay.asp;
            wxPayModel.SetParameter("spbill_create_ip", createIp);     //指用户浏览器端 IP,不是商户服务器 IP,格式为IPV4;

            return(wxPayModel);
        }