Set the AllowRecursiveNodeChecking property to true to enable recursive node checking:
- When you check/uncheck a parent node, its children become checked/unchecked.
- When you check/uncheck all child nodes, its parent becomes checked/unchecked.
- When you check/uncheck a child node, but not all child nodes are checked/unchecked, its parent goes to the indeterminate check state.
| Xaml |
<dxg:GridControl Name="gridControl">
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="Name"/>
<dxg:GridColumn FieldName="Department"/>
<dxg:GridColumn FieldName="Position"/>
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TreeListView KeyFieldName="ID" ParentFieldName="ParentID" AutoExpandAllNodes="True"
ShowCheckboxes="True" CheckBoxFieldName="OnVacation" AllowRecursiveNodeChecking="True" />
</dxg:GridControl.View>
</dxg:GridControl>
|
| C# |
public class Employee {
public int ID { get; set; }
public int ParentID { get; set; }
public string Name { get; set; }
public string Position { get; set; }
public string Department { get; set; }
public bool OnVacation { get; set; }
}
|
| VB |
Public Class Employee
Public Property ID As Integer
Public Property ParentID As Integer
Public Property Name As String
Public Property Position As String
Public Property Department As String
Public Property OnVacation As Boolean
End Class
|
The TreeListNode.IsChecked property returns the following values:
- true - if all child nodes are checked
- false - if none of child nodes are checked
- null - if a node contains both checked and unchecked children.
Note
If the AllowRecursiveNodeChecking is true, when you use the CheckBoxFieldName property to update a field in a data source, this field should be of the Nullable<Boolean> data type.