private void del_submit_button_Click(object sender, EventArgs e) { int id = int.Parse(del_flightidvalue_label.Text); FormDatabaseHelper.removeFlightFromRoutes(id); string origin = del_destination_combobox.Text; string destination = del_destination_combobox.Text; DataTable newEditTable; BindingSource SBind = new BindingSource(); if ((del_origin_combobox.SelectedItem != null) && (del_destination_combobox.SelectedItem != null)) { newEditTable = FormDatabaseHelper.updateEditGridViewTable(origin, destination); } else if ((del_origin_combobox.SelectedItem != null) && (del_destination_combobox.SelectedItem == null)) { newEditTable = FormDatabaseHelper.updateEditGridViewTable(origin, null); } else if ((del_origin_combobox.SelectedItem == null) && (del_destination_combobox.SelectedItem != null)) { newEditTable = FormDatabaseHelper.updateEditGridViewTable(null, destination); } else { newEditTable = FormDatabaseHelper.updateEditGridViewTable(null, null); } SBind.DataSource = newEditTable; del_flights_datagridview.Columns.Clear(); deleteTableColumnSetup(); del_flights_datagridview.DataSource = SBind; del_flights_datagridview.Refresh(); }