WingPaymentService/Common/WeChat/WxPayNativePay.cs

using System.Linq;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace WingPaymentService.Common.WeChat
{
    public class WxPayNativePay
    {
        private WxPayApi _wxPayApi = new WxPayApi();

        /// <summary>
        /// 获取网站支付链接
        /// </summary>
        /// <param name="body">商品描述</param>
        /// <param name="totalAmount">总金额</param>
        /// <param name="outTradeNo">订单信息</param>
        /// <param name="attach">附加数据</param>
        /// <param name="deviceInfo">设备信息</param>
        /// <returns></returns>
        public async Task<string> GetWebPayUrl(string body, int totalAmount, string outTradeNo, string attach, string deviceInfo)
        {
            WxPayData data = new WxPayData();
            data.SetValue("body", body);//商品描述
            data.SetValue("attach", attach);//附加数据
            data.SetValue("out_trade_no", outTradeNo);//随机字符串
            data.SetValue("total_fee", totalAmount);//总金额
            //将当前服务器时间转换为北京时间（微信接口只接受北京时间）
            var startBeijingTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.Now, TimeZoneInfo.Local.Id, "China Standard Time");
            data.SetValue("time_start", startBeijingTime.ToString("yyyyMMddHHmmss"));//交易起始时间
            data.SetValue("time_expire", startBeijingTime.AddMinutes(10).ToString("yyyyMMddHHmmss"));//交易结束时间
            //data.SetValue("goods_tag", "jjj");//商品标记
            data.SetValue("trade_type", "NATIVE");//交易类型
            data.SetValue("device_info", deviceInfo);

            WxPayData result = await _wxPayApi.UnifiedOrder(data);//调用统一下单接口
            var errorCode = result.GetValue("err_code_des")?.ToString();
            if (!string.IsNullOrWhiteSpace(errorCode))
            {
                throw new Exception(errorCode);
            }
            string url = result.GetValue("code_url")?.ToString();//获取二维码链接
            return url;
        }

        /// <summary>
        /// 获取手机网站支付链接
        /// </summary>
        /// <param name="body">商品描述</param>
        /// <param name="totalAmount">总金额</param>
        /// <param name="outTradeNo">订单信息</param>
        /// <param name="attach">附加数据</param>
        /// <param name="deviceInfo">设备信息</param>
        /// <returns></returns>
        public async Task<string> GetWapPayUrl(string body, int totalAmount, string outTradeNo, string attach, string deviceInfo)
        {
            WxPayData data = new WxPayData();
            data.SetValue("body", body);//商品描述
            data.SetValue("attach", attach);//附加数据
            data.SetValue("out_trade_no", outTradeNo);//随机字符串
            data.SetValue("total_fee", totalAmount);//总金额
            //将当前服务器时间转换为北京时间（微信接口只接受北京时间）
            var startBeijingTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.Now, TimeZoneInfo.Local.Id, "China Standard Time");
            data.SetValue("time_start", startBeijingTime.ToString("yyyyMMddHHmmss"));//交易起始时间
            data.SetValue("time_expire", startBeijingTime.AddMinutes(10).ToString("yyyyMMddHHmmss"));//交易结束时间
            //data.SetValue("goods_tag", "jjj");//商品标记
            data.SetValue("trade_type", "MWEB");//交易类型
            data.SetValue("device_info", deviceInfo);

            WxPayData result = await _wxPayApi.UnifiedOrder(data);//调用统一下单接口
            var errorCode = result.GetValue("err_code_des")?.ToString();
            if (!string.IsNullOrWhiteSpace(errorCode))
            {
                throw new Exception(errorCode);
            }
            string url = result.GetValue("mweb_url")?.ToString();//wap支付链接
            return url;
        }

        /// <summary>
        /// 查询订单获取json
        /// </summary>
        /// <param name="outTradeNo"></param>
        /// <returns></returns>
        public async Task<WxPayData> OrderQuery(string outTradeNo)
        {
            WxPayData data = new WxPayData();
            data.SetValue("out_trade_no", outTradeNo);//商品描述
            WxPayData result = await _wxPayApi.OrderQuery(data);
            return result;
        }

        /// <summary>
        /// 查询退款单获取json
        /// </summary>
        /// <param name="outTradeNo"></param>
        /// <returns></returns>
        public async Task<string> RefundQuery(string outTradeNo)
        {
            WxPayData data = new WxPayData();
            data.SetValue("out_trade_no", outTradeNo);//商品描述
            WxPayData result = await _wxPayApi.RefundQuery(data);
            return result.ToJson();
        }

        /**
        * 参数数组转换为url格式
        * @param map 参数名与参数值的映射表
        * @return URL字符串
        */
        private string ToUrlParams(SortedDictionary<string, object> map)
        {
            string buff = "";
            foreach (KeyValuePair<string, object> pair in map)
            {
                buff += pair.Key + "=" + pair.Value + "&";
            }
            buff = buff.Trim('&');
            return buff;
        }
    }
}