WinForms TreeList - Display numbers within node indicator cells

This example handles the CustomDrawNodeIndicator event to display numbers within node indicator cells:

private void treeList1_CustomDrawNodeIndicator(object sender, DevExpress.XtraTreeList.CustomDrawNodeIndicatorEventArgs e) {
    TreeList tree = sender as DevExpress.XtraTreeList.TreeList;
    IndicatorObjectInfoArgs args = e.ObjectArgs as IndicatorObjectInfoArgs;
    args.DisplayText = (tree.GetVisibleIndexByNode(e.Node) + 1).ToString();
    e.ImageIndex = -1;
}

Files to Review

• Form1.cs (VB: Form1.vb)