private void UpdateData(BusinessClass.For @for) { dataGridView1.DataSource = BusinessClass.DataOutPut(@for); PresentationLayerClass.AddItemsToComboBox(comboBox1, BusinessClass.For.Groupe); PresentationLayerClass.AddItemsToComboBox(comboBox2, BusinessClass.For.Hostel); PresentationLayerClass.AddItemsToComboBox(comboBox3, BusinessClass.For.Room); }