TreeView创建IHierarchicalDataSource类型的数据源实现
IHierarchicalDataSource实现: public class InsHierarchyData : IHierarchyData, ICustomTypeDescriptor { private DataRowView item; private string dataParent
IHierarchicalDataSource实现: public class InsHierarchyData : IHierarchyData, ICustomTypeDescriptor { private DataRowView item; private string dataParent