private void OnToolbarClick(object sender, ToolbarButtonClickEventArgs e)
{
switch (e.ClickedButton)
{
case ToolbarButton.Back:
BackCommand?.TryExecute();
break;
case ToolbarButton.Edit:
EditCommand?.TryExecute();
break;
case ToolbarButton.Delete:
DeleteCommand?.TryExecute();
break;
case ToolbarButton.Save:
SaveCommand?.TryExecute();
break;
case ToolbarButton.Cancel:
CancelCommand?.TryExecute();
break;
}
}