How to scroll through the TreeViewAdv control using up / down arrow keys while in edit mode

The user could navigate through the nodes in the TreeViewAdv control using the keyboard while in editing mode, by using the following code snippet.

c#

private void treeViewAdv1_BeforeEdit(object sender, Syncfusion.Windows.Forms.Tools.TreeNodeAdvBeforeEditEventArgs e)

{

    TempNode = e.Node;

    TextBox t = e.TextBox;

    //To handle the Keys while editing the node 

    t.KeyDown += new KeyEventHandler(t_KeyDown);

}



private void t_KeyDown(object sender, KeyEventArgs e)

{

    TextBox t = sender as TextBox;

    if (e.KeyData == Keys.Down || e.KeyData == Keys.Up)

    {

        //To Stop the editing 

        this.treeViewAdv1.EndEdit(true);

        //To replace the edited contents into the selected node. 

        TempNode.Text = t.Text;

        //End the event 

        e.Handled = true;

    }

}

vbnet

Private Sub treeViewAdv1_BeforeEdit(ByVal sender As Object, ByVal e As Syncfusion.Windows.Forms.Tools.TreeNodeAdvBeforeEditEventArgs)

    TempNode = e.Node

    Dim t As TextBox = e.TextBox

    'To handle the Keys while editing the node 

    AddHandler t.KeyDown, AddressOf t_KeyDown

End Sub

Private Sub t_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)

    Dim t As TextBox = CType(IIf(TypeOf sender Is TextBox, sender, Nothing), TextBox)

    If e.KeyData = Keys.Down OrElse e.KeyData = Keys.Up Then

        'To Stop the editing 

        Me.treeViewAdv1.EndEdit(True)

        'To replace the edited contents into the selected node. 

        TempNode.Text = t.Text

        'End the event 

        e.Handled = True

    End If

End Sub