/**
* 生成扫描支付模式一URL
* @param productId 商品ID
* @return 模式一URL
*/
public string GetPrePayUrl(string productId)
{
Log.Info(this.GetType().ToString(), "Native pay mode 1 url is producing...");
WxPayData data = new WxPayData();
data.SetValue("appid", WxPayConfig.APPID);//公众帐号id
data.SetValue("mch_id", WxPayConfig.MCHID);//商户号
data.SetValue("time_stamp", WxPayApi.GenerateTimeStamp());//时间戳
data.SetValue("nonce_str", WxPayApi.GenerateNonceStr());//随机字符串
data.SetValue("product_id", productId);//商品ID
data.SetValue("sign", data.MakeSign());//签名
string str = ToUrlParams(data.GetValues());//转换为URL串
string url = "weixin://wxpay/bizpayurl?" + str;
Log.Info(this.GetType().ToString(), "Get native pay mode 1 url : " + url);
return url;
}