The ASPxTreeList control is designed to display information as a tree. Data sources present this information using data fields and records. In the ASPxTreeList, data fields are represented as columns and a record is displayed as a node.
The ASPxTreeList holds its columns within the ASPxTreeList.Columns collection. Data columns are represented by the TreeListDataColumn objects. Their TreeListDataColumn.FieldName properties refer to valid fields in the data source.
On the client, data columns are represented by the ASPxClientTreeListColumn objects.