private XmlDocument loadConfigDoc(XmlDocument cfgDoc)
        {
            // load the config file   
            if (Convert.ToInt32(ConfigType) == Convert.ToInt32(ConfigFileType.AppConfig))
            {
                docName = ((Assembly.GetEntryAssembly()).GetName()).Name;
                docName += ".exe.config";
            }
            else
            {
                docName = HttpContext.Current.Server.MapPath("web.config");//错误在这里
            }
            cfgDoc.Load(docName);
            return cfgDoc;
        }