This property allows you to use the FlexGrid as a bound TreeView.

To use it, the data source must contain items that have properties which are collections of the same type.

For example, assuming you have a Person class with a Children property that contains a list of Person objects, and you want to display the data as a tree.

You could accomplish that using the following XAML:

To display the data as a tree, the grid creates GroupRow objects for every item in the collection.

<c1:C1FlexGrid 
    AutoGenerateColumns="False" 
    ChildItemsPath="Children" >
    <c1:C1FlexGrid.Columns>
        <c1:Column Header="Name" Binding="{Binding Name}" Width="*" />
        <c1:Column Header="Children" Binding="{Binding Children.Count}" />
    </c1:C1FlexGrid.Columns>
</c1:C1FlexGrid>

Reference

C1FlexGrid Class
C1FlexGrid Members