.net 快递100 api接口 下面代码有什么问题吗？

string apiurl = "http://www.kuaidi100.com/applyurl?key=" + ApiKey + "&com=" + typeCom + "&nu=" + nu ;
//Response.Write (apiurl);
WebRequest request = WebRequest.Create(@apiurl);
WebResponse response = request.GetResponse();
Stream stream = response.GetResponseStream();
Encoding encode = Encoding.UTF8;
StreamReader reader = new StreamReader(stream, encode);
string detail =reader.ReadToEnd();
Response.Write("" + "
"+ powered);

http://www.cnblogs.com/fengwenit/p/4662640.html
检查下你的apikey以及断点获取下detail