TreeViewAdv-Selection Mode
The SelectionMode property allows users to select single or multiple nodes as required. Based on selection, drag-and-drop can be performed in TreeViewAdv.
Single Selection Mode
The user can select only one node at a time.
MultiSelect Same Level
The user can do multiple selection only with nodes of same level, i.e only child nodes or only parent nodes.
MultiSelect All
The user can select multiple nodes under any level in TreeViewAdv.

The Tree package provides an advanced Tree View control with numerous appearance options, extensive customization capabilities, and a data-bound mode that supports data binding by taking a relational data source with rows and columns (Data Set, Data View, Array List) and grouping the rows based on one or more specified fields.