private void HelpGridView_PopupMenuShowing(object sender, PopupMenuShowingEventArgs e)
{
e.Menu.Items.Add(new DevExpress.Utils.Menu.DXMenuItem("Select All Records", (o1, e1) =>
{
#pragma warning disable CS0618 // 'GridControl.KeyboardFocusView' is obsolete: 'Use the FocusedView property instead.'
var MaxRow = ((HelpGrid.KeyboardFocusView as GridView).RowCount);
#pragma warning restore CS0618 // 'GridControl.KeyboardFocusView' is obsolete: 'Use the FocusedView property instead.'
for (var i = 0; i < MaxRow; i++)
{
HelpGridView.SetRowCellValue(i, HelpGridView.Columns["Select"], true);
}
}));
}