/// <summary> /// 获取二维码 /// </summary> /// <param name="orderNumber"></param> /// <returns></returns> public string GetCodeUrl(string orderNumber) {
var result = string.Empty;
if (!string.IsNullOrEmpty(orderNumber)) {
var matchedItem = db.OrderInfoForProducts.FirstOrDefault(x => x.OrderNumber == orderNumber);
if (matchedItem != null && matchedItem.IsPaid == false) {
WxPayData data = new WxPayData();
data.SetValue("body", "productBody");
//商品描述 data.SetValue("attach", "attach data");
//附加数据 data.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());
//随机字符串 data.SetValue("total_fee", price);
//总金额 data.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
//交易起始时间 data.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));
//交易结束时间 data.SetValue("goods_tag", "tag");
//商品标记 data.SetValue("trade_type", "NATIVE");
//交易类型 data.SetValue("product_id", WxPayApi.GenerateOutTradeNo());
//商品ID result = WxPayApi.UnifiedOrder(data).GetValue("code_url").ToString();
//调用统一下单接口 }
}
return result;
}

/// <summary> /// 根据字符串得到相应的二维码 /// </summary> /// <param name="qrInfo"></param> /// <param name="productName"></param> /// <param name="version"></param> /// <returns></returns> public static Image CreateQRCodeImage(string qrInfo, string productName, string version) {
try {
if (!string.IsNullOrEmpty(qrInfo)) {
QRCodeEncoder encoder = new QRCodeEncoder {
QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE, QRCodeScale = 4, QRCodeVersion = 0, QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M }
;
//编码方式(注意：BYTE能支持中文，ALPHA_NUMERIC扫描出来的都是数字) //大小(值越大生成的二维码图片像素越高) //版本(注意：设置为0主要是防止编码的字符串太长时发生错误) //错误效验、错误更正(有4个等级) Image image = encoder.Encode(qrInfo, Encoding.GetEncoding("utf-8"));
string filename = $"{
productName}
_{
version}
.png";
var userLocalPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
var docPath = Path.Combine(userLocalPath, @"Your ProductQRCode");
if (!Directory.Exists(docPath)) {
Directory.CreateDirectory(docPath);
}
string filepath = Path.Combine(docPath, filename);
using (FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.Write)) {
image.Save(fs, System.Drawing.Imaging.ImageFormat.Png);
fs.Close();
image.Dispose();
}
return image;
}
}
catch (Exception) {
return null;
}
return null;
}

/// <summary> /// 回调函数 /// </summary> public ActionResult UpdatePayStatus() {
//接收从微信后台POST过来的数据 System.IO.Stream s = Request.InputStream;
int count = 0;
byte[] buffer = new byte[1024];
StringBuilder builder = new StringBuilder();
while ((count = s.Read(buffer, 0, 1024)) > 0) {
builder.Append(Encoding.UTF8.GetString(buffer, 0, count));
}
s.Flush();
s.Close();
s.Dispose();
//转换数据格式并验证签名 WxPayData data = new WxPayData();
try {
data.FromXml(builder.ToString());
}
catch (WxPayException ex) {
//若签名错误，则立即返回结果给微信支付后台 WxPayData res = new WxPayData();
res.SetValue("return_code", "FAIL");
res.SetValue("return_msg", ex.Message);
LogEntity signErrorLog = new LogEntity();
signErrorLog.errorMessage = ex.Message;
LogHelper.WriteLog(signErrorLog, null);
Response.Write(res.ToXml());
Response.End();
}
ProcessNotify(data);
return View();
}
/// <summary> /// 处理回调数据 /// </summary> /// <param name="data"></param> public void ProcessNotify(WxPayData data) {
WxPayData notifyData = data;
//检查支付结果中transaction_id是否存在 if (!notifyData.IsSet("transaction_id")) {
//若transaction_id不存在，则立即返回结果给微信支付后台 WxPayData res = new WxPayData();
res.SetValue("return_code", "FAIL");
res.SetValue("return_msg", "支付结果中微信订单号不存在");
LogEntity orderLog = new LogEntity();
orderLog.errorMessage = "支付结果中微信订单号不存在";
LogHelper.WriteLog(orderLog, null);
Response.Write(res.ToXml());
Response.End();
}
string transaction_id = notifyData.GetValue("transaction_id").ToString();
//查询订单，判断订单真实性 if (!QueryOrder(transaction_id)) {
//若订单查询失败，则立即返回结果给微信支付后台 WxPayData res = new WxPayData();
res.SetValue("return_code", "FAIL");
res.SetValue("return_msg", "订单查询失败");
LogEntity orderqueryLog = new LogEntity();
orderqueryLog.errorMessage = "订单查询失败";
LogHelper.WriteLog(orderqueryLog, null);
Response.Write(res.ToXml());
Response.End();
}
//查询订单成功 else {
WxPayData res = new WxPayData();
res.SetValue("return_code", "SUCCESS");
res.SetValue("return_msg", "OK");
SetPaymentResult(data);
//这里的参数是 data ！！！ 不是 res ！！！ Response.Write(res.ToXml());
Response.End();
}
}
/// <summary> /// 商户后台更新 /// </summary> /// <param name="res"></param> private void SetPaymentResult(WxPayData res) {
var isSucessFlagOne = res.GetValue("return_code").ToString();
var isSuccessFlagTwo = res.GetValue("result_code").ToString();
if (isSucessFlagOne == "SUCCESS" && isSuccessFlagTwo == "SUCCESS") {
//自己的业务逻辑 ！！！！ }
}
//查询订单 private bool QueryOrder(string transaction_id) {
WxPayData req = new WxPayData();
req.SetValue("transaction_id", transaction_id);
WxPayData res = WxPayApi.OrderQuery(req);
if (res.GetValue("return_code").ToString() == "SUCCESS" && res.GetValue("result_code").ToString() == "SUCCESS") {
return true;
}
else {
return false;
}
}