public class Config
{
 // 應(yīng)用ID,您的APPID
 public static string AppId = "";
 /// <summary>
 /// 合作商戶uid
 /// </summary>
 public static string Uid = "";
 // 支付寶網(wǎng)關(guān)
 public static string Gatewayurl = "https://openapi.alipaydev.com/gateway.do";
 // 商戶私鑰，您的原始格式RSA私鑰
 public static string PrivateKey = "";
 // 支付寶公鑰,查看地址：https://openhome.alipay.com/platform/keyManage.htm 對應(yīng)APPID下的支付寶公鑰。
 public static string AlipayPublicKey = "";
 // 簽名方式
 public static string SignType = "RSA2";
 // 編碼格式
 public static string CharSet = "UTF-8";
}

/// <summary>
/// 生成支付二維碼
/// </summary>
/// <param name="orderName">訂單名稱</param>
/// <param name="orderAmount">訂單金額</param>
/// <param name="outTradeNo">訂單號</param>
/// <returns></returns>
[HttpGet]
public IActionResult ScanCodeGen(string orderName, string orderAmount, string outTradeNo)
{
 AlipayTradePrecreateContentBuilder builder = BuildPrecreateContent(orderName,orderAmount,outTradeNo);
 //如果需要接收掃碼支付異步通知，那么請把下面兩行注釋代替本行。
 //推薦使用輪詢撤銷機(jī)制，不推薦使用異步通知,避免單邊賬問題發(fā)生。
 AlipayF2FPrecreateResult precreateResult = _serviceClient.tradePrecreate(builder);
 //string notify_url = "http://10.5.21.14/Pay/Notify"; //商戶接收異步通知的地址
 //AlipayF2FPrecreateResult precreateResult = serviceClient.tradePrecreate(builder, notify_url);
 //以下返回結(jié)果的處理供參考。
 //payResponse.QrCode即二維碼對于的鏈接
 //將鏈接用二維碼工具生成二維碼打印出來，顧客可以用支付寶錢包掃碼支付。
 var bitmap = new Bitmap(Path.Combine(_hostingEnvironment.WebRootPath, "images/error.png"));
 switch (precreateResult.Status)
 {
 case ResultEnum.SUCCESS:
  bitmap.Dispose();
  bitmap=RenderQrCode(precreateResult.response.QrCode);
  //輪詢訂單結(jié)果
  //根據(jù)業(yè)務(wù)需要，選擇是否新起線程進(jìn)行輪詢
  ParameterizedThreadStart parStart = new ParameterizedThreadStart(LoopQuery);
  Thread myThread = new Thread(parStart);
  object o = precreateResult.response.OutTradeNo;
  myThread.Start(o);
  break;
 case ResultEnum.FAILED:
  Console.WriteLine("生成二維碼失敗："+ precreateResult.response.Body);
  break;
 case ResultEnum.UNKNOWN:
  Console.WriteLine("生成二維碼失?。? + (precreateResult.response == null ? "配置或網(wǎng)絡(luò)異常，請檢查后重試" : "系統(tǒng)異常，請更新外部訂單后重新發(fā)起請求"));
  break;
 }
 MemoryStream ms = new MemoryStream();
 bitmap.Save(ms, ImageFormat.Png);
 byte[] bytes = ms.GetBuffer();
 return File(bytes, "image/png");
}

/// <summary>
/// 構(gòu)造支付請求數(shù)據(jù)
/// </summary>
/// <param name="orderName">訂單名稱</param>
/// <param name="orderAmount">訂單金額</param>
/// <param name="outTradeNo">訂單編號</param>
/// <returns>請求結(jié)果集</returns>
private AlipayTradePrecreateContentBuilder BuildPrecreateContent(string orderName,string orderAmount,string outTradeNo)
{
 //線上聯(lián)調(diào)時，請輸入真實的外部訂單號。
 if (string.IsNullOrEmpty(outTradeNo))
 {
 outTradeNo = System.DateTime.Now.ToString("yyyyMMddHHmmss") + "0000" + (new Random()).Next(1, 10000).ToString();
 }
 AlipayTradePrecreateContentBuilder builder = new AlipayTradePrecreateContentBuilder();
 //收款賬號
 builder.seller_id = Config.Uid;
 //訂單編號
 builder.out_trade_no = outTradeNo;
 //訂單總金額
 builder.total_amount = orderAmount;
 //參與優(yōu)惠計算的金額
 //builder.discountable_amount = "";
 //不參與優(yōu)惠計算的金額
 //builder.undiscountable_amount = "";
 //訂單名稱
 builder.subject = orderName;
 //自定義超時時間
 builder.timeout_express = "5m";
 //訂單描述
 builder.body = "";
 //門店編號，很重要的參數(shù)，可以用作之后的營銷
 builder.store_id = "test store id";
 //操作員編號，很重要的參數(shù)，可以用作之后的營銷
 builder.operator_id = "test";
 //傳入商品信息詳情
 List<GoodsInfo> gList = new List<GoodsInfo>();
 GoodsInfo goods = new GoodsInfo();
 goods.goods_id = "goods id";
 goods.goods_name = "goods name";
 goods.price = "0.01";
 goods.quantity = "1";
 gList.Add(goods);
 builder.goods_detail = gList;
 //系統(tǒng)商接入可以填此參數(shù)用作返傭
 //ExtendParams exParam = new ExtendParams();
 //exParam.sysServiceProviderId = "20880000000000";
 //builder.extendParams = exParam;
 return builder;
}

/// <summary>
/// 渲染二維碼
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
private Bitmap RenderQrCode(string str)
{
 QRCodeGenerator.ECCLevel eccLevel = QRCodeGenerator.ECCLevel.L;
 using (QRCodeGenerator qrGenerator = new QRCodeGenerator())
 {
 using (QRCodeData qrCodeData = qrGenerator.CreateQrCode(str, eccLevel))
 {
  using (QRCode qrCode = new QRCode(qrCodeData))
  {
  Bitmap bp= qrCode.GetGraphic(20, Color.Black, Color.White,
   new Bitmap(Path.Combine(_hostingEnvironment.WebRootPath, "images/alipay.png")), 15);
  return bp;
  }
 }
 }
}

/// <summary>
/// 輪詢支付結(jié)果
/// </summary>
/// <param name="o">訂單號</param>
public void LoopQuery(object o)
{
 AlipayF2FQueryResult queryResult = new AlipayF2FQueryResult();
 int count = 100;
 int interval = 10000;
 string outTradeNo = o.ToString();
 for (int i = 1; i <= count; i++)
 {
 Thread.Sleep(interval);
 queryResult = _serviceClient.tradeQuery(outTradeNo);
 if (queryResult?.Status == ResultEnum.SUCCESS)
 {
  DoSuccessProcess(queryResult);
  return;
 }
 }
 DoFailedProcess(queryResult);
}
/// <summary>
/// 請?zhí)砑又Ц冻晒蟮奶幚?
/// </summary>
private void DoSuccessProcess(AlipayF2FQueryResult queryResult)
{
 //支付成功，請更新相應(yīng)單據(jù)
 Console.WriteLine("掃碼支付成功：商戶訂單號 " + queryResult.response.OutTradeNo);
}
/// <summary>
/// 請?zhí)砑又Ц妒『蟮奶幚?
/// </summary>
private void DoFailedProcess(AlipayF2FQueryResult queryResult)
{
 //支付失敗，請更新相應(yīng)單據(jù)
 Console.WriteLine("掃碼支付失?。荷虘粲唵翁?" + queryResult.response.OutTradeNo);
}