1、form data 需要编码!!!
byte[] data = new ASCIIEncoding().GetBytes("pattern=0&wwid=古兴越&goodid=&page=1");//没有编码 查不到数据
request.ContentLength = data.Length;//ContentLength
Stream newStream = request.GetRequestStream();
newStream.Write(data, , data.Length);
newStream.Close();