System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Xml.XmlAttributeCollection.get_ItemOf(String name)
   at tfox.CommonLibrary.CommonClass.AddNodeAttribute(XmlNode node, String AttributeName, String AttributeValue)
   at tfox.fenzhan.NGenerateSub.GenerateNode(String filter, XmlNode node)
   at tfox.fenzhan.NGenerateSub.GetData(String entity, String filter)
   at tfox.fenzhan.NGenerateSub.BindData(Match match, StringBuilder sb)
   at tfox.fenzhan.NGenerateSub.BindChildData(ArrayList list, StringBuilder temp, DataRow dr)
   at tfox.fenzhan.NGenerateSub.BindData(Match match, StringBuilder sb)
   at tfox.fenzhan.NGenerateSub.BindData(StringBuilder sb, String rootPath, String template)
   at tfox.fenzhan.NGenerateSub.GenerateProList(String rootPath, String template, String typeid1, String id, String city, String py, String page)