/// <summary>
/// 扫码支付模式二生成二维码
/// </summary>
/// <param name="id">商品id</param>
public void NativePayTwo(string id)
{
//商户根据productid【在生成二维码时传的是订单号就是订单号，是商品号就是商品号，要对应起来】生成商户系统的订单
//:TODO
//统一下单
SortedDictionary <string, object> orderParams = new SortedDictionary <string, object>();
orderParams.Add("appid", ApiModel.AppID);
orderParams.Add("attach", "微信扫码支付"); //附加数据
orderParams.Add("body", "扫码支付二测试"); //商品描述
orderParams.Add("mch_id", ApiModel.MchID);
orderParams.Add("nonce_str", Common.GetNonceStr());
orderParams.Add("notify_url", "http://www.liblog.cn/test/pay/payresultnotify"); //支付成功后的回调URl
orderParams.Add("product_id", id); //商品标记
orderParams.Add("out_trade_no", Pay.GetOutTradeNo(ApiModel.MchID)); //随机字符串
orderParams.Add("spbill_create_ip", "171.8.215.143");
orderParams.Add("total_fee", 1); //总金额
orderParams.Add("trade_type", "NATIVE"); //商品订单号
orderParams.Add("sign", Pay.GetSign(orderParams, ApiModel.MchAPISecret));
//直接支付URL
var url = Pay.GetPayUrlForNativeTwo(orderParams);
//初始化二维码生成工具
QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
qrCodeEncoder.QRCodeVersion = 0;
qrCodeEncoder.QRCodeScale = 4;
//将字符串生成二维码图片
Bitmap image = qrCodeEncoder.Encode(url, Encoding.Default);
//保存为PNG到内存流
MemoryStream ms = new MemoryStream();
image.Save(ms, ImageFormat.Png);
//输出二维码图片
Response.BinaryWrite(ms.GetBuffer());
Response.End();
}