DataGridViewComboBoxColumn dg1 = new DataGridViewComboBoxColumn();
            dg1.Name= "id_city";
            dg1.HeaderText = "Город";
             dg1.DataPropertyName = "id_city";
            dg1.DisplayMember = "name";
            dg1.ValueMember = "id";
            dg1.ReadOnly = true;
            dg1.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing;
            dg1.DataSource = cityDataSet.Tables[0]; 
            dgList.Columns.Add(dg1);