【微信支付踩坑记01】v2版支付简单示例

v2版生成订单代码

没什么好说的

public string WeChatpayJSAPI(string money, string openid,string partner_trade_no,string desc)
        {
            PayWeChat wPay = new PayWeChat();
            try
            {
                string TheNum = partner_trade_no;

                string Appid = mch_appid;
                string mch_id = mchid;
                string thisurl = "";
                string nonce_str = CreatenNonce_str();
                string ip = "127.0.0.1";
                string wechatpay = Convert.ToInt32(Convert.ToDecimal(money) * 100).ToString();

                SortedDictionary<string, string> sParams = new SortedDictionary<string, string>();

                sParams.Add("appid", Appid);
                sParams.Add("body", string.Format(desc+"。订单金额：" + money));
                sParams.Add("device_info", "JSAPI");
                sParams.Add("mch_id", mch_id);//微信商户号
                sParams.Add("nonce_str", nonce_str);
                sParams.Add("notify_url", thisurl);//接收回调通知的网址
                sParams.Add("openid", openid);//微信用户openid
                sParams.Add("out_trade_no", TheNum);//商户单号
                sParams.Add("spbill_create_ip", ip);//发起者ip
                sParams.Add("total_fee", wechatpay);//总金额
                sParams.Add("trade_type", "JSAPI");
                sParams.Add("sign", MakeWxPaySign(sParams));
                StringBuilder sb = new StringBuilder();
                sb.Append("<xml>");
                foreach (KeyValuePair<string, string> temp in sParams)
                {
                    if (temp.Value == "" || temp.Value == null) continue;
                    sb.Append("<").Append(temp.Key.Trim()).Append(">");
                    sb.Append(temp.Value.Trim());
                    sb.Append("</").Append(temp.Key.Trim()).Append(">");
                }
                sb.Append("</xml>");
                string rv = GetPage("https://api.mch.weixin.qq.com/pay/unifiedorder", sb.ToString());

                return rv;
            }
            catch (Exception e)
            {
                return "error";
            }
        }

/// <summary>
        /// 生成微信支付的签名
        /// </summary>
        /// <param name="sParams"></param>
        /// <returns></returns>
        public static string MakeWxPaySign(SortedDictionary<string, string> sParams)// 生成微信支付的签名
        {
            string key = "PayKey";
            
            StringBuilder sb = new StringBuilder();
            foreach (KeyValuePair<string, string> temp in sParams)
            {
                if (temp.Value == "" || temp.Value == null || temp.Key.ToLower() == "sign")
                {
                    continue;
                }
                sb.Append(temp.Key.Trim() + "=" + temp.Value.Trim() + "&");
            }

            sb.Append("key=" + key.Trim() + "");
            string signkey = sb.ToString();

            System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create();
            byte[] data = md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(signkey));
            sb = new StringBuilder();
            for (int n = 0; n < data.Length; n++)
            {
                sb.Append(data[n].ToString("x2"));
            }

            return sb.ToString().ToUpper();
        }