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

1 Oct 20182 minutes to read

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