souregrid加入combobox有关问题。高分求解

            SourceGrid.Cells.Editors.ComboBox externalIdEditor = new SourceGrid.Cells.Editors.ComboBox(typeof(int));
            externalIdEditor.StandardValues = new int[] { 1, 2, 3, 4 };
            externalIdEditor.StandardValuesExclusive = true;
            externalIdEditor.Control.FormattingEnabled = true;
            externalIdEditor.AllowNull = false;            
            

            DevAge.ComponentModel.Validator.ValueMapping mapping = new DevAge.ComponentModel.Validator.ValueMapping();
            mapping.ValueList = new int[] { 1, 2, 3, 4 };
            mapping.DisplayStringList = new string[] { "Reference 1", "Reference 2", "Reference 3", "Reference 4" };
            mapping.BindValidator(externalIdEditor);