kolumna z bazy danych do checkedListBox

 
            using (SqlConnection sc2 = new SqlConnection())
            {
                sc2.ConnectionString = connectionString;
                sc2.Open();
                using (SqlDataAdapter sda2 = new SqlDataAdapter("SELECT id_badania, nazwa FROM Badania", sc2))
                {
                    DataTable dt2 = new DataTable();
                    sda2.Fill(dt2);
                    checkedListBox1.ValueMember = "id_badania";
                    checkedListBox1.DisplayMember = "nazwa";
                    checkedListBox1.DataSource = dt2;
                }

checkedListBox1.DataSource = dt2;
checkedListBox1.ValueMember = "id_badania";
checkedListBox1.DisplayMember = "nazwa";