protected void Page_Load(object sender, EventArgs e)
{
string sp_billno = Request["order_no"];
//当前时间 yyyyMMdd
string date = DateTime.Now.ToString("yyyyMMdd");
//订单号，此处用时间和随机数生成，商户根据自己调整，保证唯一
string out_trade_no = "" + DateTime.Now.ToString("HHmmss") + TenpayUtil.BuildRandomStr(4);
if (null == sp_billno)
{
//生成订单10位序列号，此处用时间和随机数生成，商户根据自己调整，保证唯一
sp_billno = DateTime.Now.ToString("HHmmss") + TenpayUtil.BuildRandomStr(4);
}
else
{
sp_billno = Request["order_no"].ToString();
}
sp_billno = TenpayUtil.partner + sp_billno;
//创建RequestHandler实例
RequestHandler packageReqHandler = new RequestHandler(Context);
//初始化
packageReqHandler.init();
packageReqHandler.setKey(TenpayUtil.key);
//设置package订单参数
packageReqHandler.setParameter("partner", TenpayUtil.partner); //商户号
packageReqHandler.setParameter("bank_type", "WX"); //银行类型
packageReqHandler.setParameter("fee_type", "1"); //币种，1人民币
packageReqHandler.setParameter("input_charset", "GBK");
packageReqHandler.setParameter("out_trade_no", sp_billno); //商家订单号
packageReqHandler.setParameter("total_fee", "1"); //商品金额,以分为单位(money * 100).ToString()
packageReqHandler.setParameter("notify_url", TenpayUtil.tenpay_notify); //接收财付通通知的URL
packageReqHandler.setParameter("body", "nativecall"); //商品描述
packageReqHandler.setParameter("spbill_create_ip", Page.Request.UserHostAddress); //用户的公网ip，不是商户服务器IP
//获取package包
string packageValue = packageReqHandler.getRequestURL();
//调起微信支付签名
string timeStamp = TenpayUtil.getTimestamp();
string nonceStr = TenpayUtil.getNoncestr();
//设置支付参数
RequestHandler payHandler = new RequestHandler(Context);
payHandler.setParameter("appid", TenpayUtil.appid);
payHandler.setParameter("noncestr", nonceStr);
payHandler.setParameter("timestamp", timeStamp);
payHandler.setParameter("package", packageValue);
payHandler.setParameter("RetCode", "0");
payHandler.setParameter("RetErrMsg", "成功");
string paySign = payHandler.createSHA1Sign();
payHandler.setParameter("app_signature", paySign);
payHandler.setParameter("sign_method", "SHA1");
Response.ContentType = "text/xml";
Response.Clear();
Response.Write(payHandler.parseXML());
}