//Заполнение комбобокса со списком ABC List.
            _queryString = "select distinct Articles.ABCList from Articles";
            using (SqlConnection _conn = new SqlConnection(Program.GlobalSetting.UserConnectionString))
            {
                try
                {
                    _conn.Open();
                    DataTable _table = new DataTable();
                    SqlDataAdapter _dataAdapter = new SqlDataAdapter(_queryString, _conn);
                    _dataAdapter.Fill(_table);
                    cbAbcList.DataSource= _table;
                    
                    cbAbcList.ValueMember = "ABCList";
                        

                }
                catch (SqlException E)
                {
                    MessageBox.Show(E.Message);
                }

                finally
                {
                    _conn.Close();
                }
            }

                    cbAbcList.ValueMember = "ABCList";
                   // cbAbcList.DisplayMember = "ABCList";
                    foreach (char value in cbAbcList.ValueMember)
                    {
                        if (value =='A')
                            cbAbcList.DisplayMember = "Это А";
                        if (value =='B')
                            cbAbcList.DisplayMember = "Это не А";
                        if (value =='-')
                            cbAbcList.DisplayMember = "Все остальное";

                    }