//Изменить данные private void bt_Update_Request_Click(object sender, RoutedEventArgs e) { DataRowView ID = (DataRowView)dgRequest.SelectedItems[0]; procedures.Request_Update(Convert.ToInt32(ID["ID_Request"]), Convert.ToInt32(tb_Name_of_Contract.SelectedValue.ToString()), Convert.ToInt32(cb_Supplier_Info.SelectedValue.ToString()), Convert.ToInt32(cb_Name_of_Technic.SelectedValue.ToString())); }