C＃DatagridViewComboBox下拉空白

Question

我对绑定源dataGridView中的组合框有疑问。我的问题是我的文档有两个项目，a3_Liggend和a4_Liggend。它显示了组合框中的名字，很好，但是下拉列表为空，并且在组合框中添加新行时显示了名称a4_Liggend。我不知道出了什么问题。也许很简单？

谢谢！

这是我获取信息的方式。我在Autodesk Revit中使用此代码：

public class LevelResource
{
    string m_dataName;
    int m_iD;

    public String Name
    {
        get
        {
            return m_dataName;
        }
        set
        {
            m_dataName = value;
        }
    }

    public int Id
    {
        get
        {
            return m_iD;
        }
        set
        {
            m_iD = value;
        }
    }
}


            try
            {
                t.Start("filter");
                getElement = new SortableBindingList<LevelResource>();
                FilteredElementCollector collector = new FilteredElementCollector(doc);
                List<ViewSheet> views = collector.OfClass(typeof(ViewSheet))
                .OfType<ViewSheet>().OrderBy(lev => lev.SheetNumber).ToList();
                {
                    IList<Element> genericSymbolsNamedTest = new FilteredElementCollector(doc)

                    .OfClass(typeof(FamilySymbol))
                    .OfCategory(BuiltInCategory.OST_TitleBlocks)
                    .ToElements();

                    foreach (FamilySymbol fs in genericSymbolsNamedTest)
                    {
                        LevelResource dataInRow2 = new LevelResource();
                        dataInRow2.Name = fs.Name;
                        dataInRow2.Id = fs.Id.IntegerValue;

                        getElement.Add(dataInRow2);
                    }

                    using (LevelView displayForm = new LevelView(this))
                        {
                            displayForm.ShowDialog();
                        }

                        t.Commit();
                        return Result.Succeeded;
                }

    public SortableBindingList<LevelResource> getElement;
    /// <summary>
    /// Store all levels' datum in system
    /// </summary>
    public SortableBindingList<LevelResource> FoundElements
    {
        get
        {
            return getElement;
        }
        set
        {
            getElement = value;
        }
    }