TreeListView.UncheckAllNodes() Method

Unchecks all nodes.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v20.1.dll

Declaration

public void UncheckAllNodes()
Public Sub UncheckAllNodes

Remarks

You can embed check boxes into nodes to allow an end user to check/uncheck individual nodes.

Embed Check Boxes into Nodes

  1. Set the TreeListView.ShowCheckboxes property to true to display check boxes embedded into nodes.

  2. Set values of check boxes. Do one of the following:

The code sample below shows how to display check boxes and bind them to the OnVacation field:

<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"
            CheckBoxFieldName="OnVacation" ShowCheckboxes="True" />
    </dxg:GridControl.View>
</dxg:GridControl>
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; }
}

Check Nodes in Code

Use the following methods to check/uncheck nodes in code:

Method Description
TreeListView.CheckAllNodes Checks all nodes.
TreeListView.UncheckAllNodes Unchecks all nodes.
TreeListNode.IsChecked Checks/unchecks the node.

When a node's check state is changed, the TreeList View raises the TreeListView.NodeCheckStateChanged event. Use the TreeListNode.IsChecked property to identify whether a node is checked.

See Also