C#webform代码问题

public class ResultNotify:Notify
{
public ResultNotify(Page page):base(page)
{
}
public override void ProcessNotify()
{
WxPayData notifyData = GetNotifyData();
//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");
Log.Error(this.GetType().ToString(), "The Pay result is error : " + res.ToXml());
page.Response.Write(res.ToXml());
page.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");
Log.Error(this.GetType().ToString(), "Order query failure : " + res.ToXml());
page.Response.Write(res.ToXml());
page.Response.End();
}
//查询订单成功
else
{
WxPayData res = new WxPayData();
res.SetValue("return_code", "SUCCESS");
res.SetValue("return_msg", "OK");
Log.Info(this.GetType().ToString(), "order query success : " + res.ToXml());
page.Response.Write(res.ToXml());
page.Response.End();
}
}
//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;
}
}
}

public class Notify
{
public Page page {get;set;}
public Notify(Page page)
{
this.page = page;
}
/// <summary>
/// 接收从微信支付后台发送过来的数据并验证签名
/// </summary>
/// <returns>微信支付后台返回的数据</returns>
public WxPayData GetNotifyData()
{
//接收从微信后台POST过来的数据
System.IO.Stream s = page.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();
Log.Info(this.GetType().ToString(), "Receive data from WeChat : " + builder.ToString());
//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);
Log.Error(this.GetType().ToString(), "Sign check error : " + res.ToXml());
page.Response.Write(res.ToXml());
page.Response.End();
}
Log.Info(this.GetType().ToString(), "Check sign success");
return data;
}
//派生类需要重写这个方法，进行不同的回调处理
public virtual void ProcessNotify()
{
}
}