private void btnPreView_Click(object sender, RoutedEventArgs e)
{
_print = PreviewPrint.GetInstancia();
_print.printFilter(dgUsers.ItemsSource);
_print.ShowDialog();
}
public static PreviewPrint GetInstancia()
{
if (_instancia == null)
{
_instancia = new PreviewPrint();
}
return(_instancia);
}
private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
_instancia = null;
}