锘縎ystem.Net.WebException: 杩滅▼鏈嶅姟鍣ㄨ繑鍥為敊璇? (404) 鏈壘鍒般€ 鍦 System.Net.HttpWebRequest.GetResponse() 鍦 VANCHEER.General.Tools.webreq(String strurl, String paramdata)