public string CreateQRCodeUrl(string productid){Dictionary<string, string> dic = new Dictionary<string, string>();dic.Add("appid", helper.GetAppId);dic.Add("mch_id", helper.GetMch_Id);dic.Add("nonce_str", TenpayUtil.getNoncestr());dic.Add("product_id", productid);dic.Add("time_stamp", TenpayUtil.getTimestamp());dic.Add("sign",helper.GetSign(dic));string url = WxPayHelper.FormatBizQueryParaMap(dic, false);//这里不要url编码return "weixin://wxpay/bizpayurl?" + url;}

生成微信二维码字符串

 WxPayHelper helper = new WxPayHelper();public void ProcessRequest(HttpContext context){         if (context.Request["buynum"]!=null){string proId ="1";//示例代码写死了,自己根据业务处理string qrurl = CreateQRCodeUrl(proId);QrEncoder qrEncoder = new QrEncoder(ErrorCorrectionLevel.H);Gma.QrCodeNet.Encoding.QrCode qrCode = new Gma.QrCodeNet.Encoding.QrCode();qrEncoder.TryEncode(qrurl, out qrCode);using (MemoryStream ms = new MemoryStream()){var renderer = new GraphicsRenderer(new FixedModuleSize(4, QuietZoneModules.Two));renderer.WriteToStream(qrCode.Matrix, ImageFormat.Png, ms);context.Response.ContentType = "image/png";context.Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length);}}          }

生成二维码

$(function () {$("#txtKey").keyup(function () {               var num=$(this).val();//这里设置购买数量$("#qrDiv").html("<img src=QrCode.ashx?buynum="+num+" height=200 width=200 /> ");});});

log4net.ILog logger = WxV3.Helper.LogHelper.GetInstance().Log;WxV3.Helper.WxPayHelper helper = new Helper.WxPayHelper();protected void Page_Load(object sender, EventArgs e){//1.接受微信平台post 过来的XML信息//2.验证签名，从XML中获取ProductID，获取产品信息//2.1设置out_trade_no，total_fee，notify_url，trade_type，product_id 参数，提交统一接口         //3.提交统一接口后获取PrepayId//4.将PrepayId 和return 根据参数拼接生xml信息（其中包含生成的package参数）输出if (Request.RequestType == "POST"){try{StreamReader reader = new StreamReader(Request.InputStream);String xmlData = reader.ReadToEnd();helper.ReceivePostXmlData(xmlData);logger.Info("接收post来的xmlData=" + xmlData);if (helper.CheckSign()){logger.Info("签名验证通过");string proId = helper.GetProductId();logger.Info("产品id=" + proId);switch (proId){case "1":#region 业务处理helper.SetParameter("body", "一缕晨光CMS系统");helper.SetParameter("out_trade_no", DateTime.Now.ToString("yyyyMMddHHmmss") + CommonUtil.BuildRandomStr(4));helper.SetParameter("total_fee", "88800");//这里单位是分helper.SetParameter("notify_url", "http://www.wispdawn.com/WxV3/NativeNotify.aspx");helper.SetParameter("trade_type", "NATIVE");string prepay_id = helper.GetPrepayId();logger.Info("prepay_id=" + prepay_id);if (!string.IsNullOrEmpty(prepay_id)){helper.SetReturnParameter("return_code", "SUCCESS");helper.SetReturnParameter("result_code", "SUCCESS");helper.SetReturnParameter("prepay_id", prepay_id);helper.SetReturnParameter("appid", helper.GetAppId);helper.SetReturnParameter("mch_id", helper.GetMch_Id);helper.SetReturnParameter("nonce_str", TenpayUtil.getNoncestr());}else{helper.SetReturnParameter("return_code", "SUCCESS");//返回状态码helper.SetReturnParameter("result_code", "FAIL");//业务结果helper.SetReturnParameter("err_code_des", "预订单生产失败");}#endregionbreak;default:helper.SetReturnParameter("return_code", "SUCCESS");//返回状态码helper.SetReturnParameter("result_code", "FAIL");//业务结果helper.SetReturnParameter("err_code_des", "此商品无效");//业务结果break;}}else{helper.SetReturnParameter("return_code", "FAIL");helper.SetReturnParameter("return_msg", "签名失败");logger.Info("签名验证没有通过");}string xmlStr = helper.GetReturnXml();logger.Info("返回xml=" + xmlStr);Response.ContentType = "text/xml";Response.Clear();Response.Write(xmlStr);Response.End();}catch (Exception ex){logger.Error("异常了", ex);}}}

  log4net.ILog logger = WxV3.Helper.LogHelper.GetInstance().Log;WxV3.Helper.WxPayHelper helper = new Helper.WxPayHelper();protected void Page_Load(object sender, EventArgs e){if (Request.RequestType == "POST"){try{StreamReader reader = new StreamReader(Request.InputStream);String xmlData = reader.ReadToEnd();helper.ReceivePostXmlData(xmlData);logger.Info("Notify_接收post来的xmlData=" + xmlData);if (helper.CheckSign()){Dictionary<string, string> dicBack = helper.GetParameter();//获取所有参数if (dicBack!=null&&dicBack.Keys.Contains("return_code")){if (dicBack["return_code"] == "SUCCESS"){logger.Info("return_code=SUCCESS");if (dicBack["result_code"]=="SUCCESS"){logger.Info("result_code=SUCCESS");                                  string out_trade_no = dicBack["out_trade_no"];//商户订单号logger.Info("out_trade_no="+out_trade_no);//1.验证商户订单号是否被处理//2.处理过直接返回成功，否则返回//此处根据out_trade_no 处理业务数据//处理业务数据结束
logger.Info("Notify_验证签名成功");helper.SetReturnParameter("return_code", "SUCCESS");helper.SetReturnParameter("return_msg", "");   }    }if (dicBack["return_code"]=="FAIL"){logger.Info("Notify_验证签名成功");helper.SetReturnParameter("return_code", "SUCCESS");helper.SetReturnParameter("return_msg", dicBack["return_msg"]);    }}}else{logger.Info("Notify_验证签名失败");helper.SetReturnParameter("return_code", "FAIL");helper.SetReturnParameter("return_msg", "签名失败");     }string xmlStr = helper.GetReturnXml();logger.Info("Notify_返回xml=" + xmlStr);Response.ContentType = "text/xml";Response.Clear();Response.Write(xmlStr);Response.End();}catch (Exception ex){logger.Error("Notify_异常了", ex);}}}

NativeNotify页面代码

 public WxPayHelper(){this.parameters = new Dictionary<string, string>();this.returnParameter = new Dictionary<string, string>();this.appid = "wxed94e6985d29****";//appidthis.mch_id = "122468****";      //微信支付商户号         this.PartnerKey = "ASD2Ssaghh3df4570erdssd4we33****";//这里是商户的partnerkey  }