ListView 显示项目但不显示组

我正在创建一个简单的模式对话框，其中包含列表视图。当我将项目添加为组的一部分时，项目将显示，但组标题不会显示。我一直在尝试在构造函数中使用一些虚拟对象。这是代码：

    //Initialize and create columns
    public ConfirmDialog(List<ContentFileInfo> files, List<ContentFileInfo> folders, ManagerMain manager)
    {
        _myFiles = files;
        _myFolders = folders;
        _manager = manager;

        InitializeComponent();
        //cbFilter.SelectedIndex = 0;
        CreateColumns();

        lstChanges.BeginUpdate();
        lstChanges.ShowGroups = true;

        ListViewGroup test = new ListViewGroup("TestGroup");

        ListViewItem item = new ListViewItem {Group = test};
        ListViewItem item2 = new ListViewItem();
        ListViewItem.ListViewSubItem sub = new ListViewItem.ListViewSubItem();
        ListViewItem.ListViewSubItem sub2 = new ListViewItem.ListViewSubItem();

        sub.Text = "Item descrip.";
        sub2.Text = "Item2 descrip.";

        item.Text = "Item name.";
        item.SubItems.Add(sub);

        item2.Text = "Item2 name.";
        item2.SubItems.Add(sub2);

        lstChanges.Items.Add(item);
        lstChanges.Groups.Add(test);
        lstChanges.Items.Add(item2);

        lstChanges.EndUpdate();

        //GetAllFolders();
        //FillListByGroup();
        //NotifyOfUnchangedFiles();
    }

and here's the dialog as it appears during the session:

根据调试器，一切都正确添加：

如果有帮助，这是调用我的对话框的代码：

    //Event: Prompt user to approve change request
    private void btnPushChanges_Clicked(object sender, EventArgs e)
    {
        ConfirmDialog dialog = new ConfirmDialog(_cmprController.SelectedFiles, _cmprController.SelectedFolders, this);
        try
        {
            dialog.ShowDialog();
        }
        catch
        {
        }
    }

Calling Application.EnableVisualStyles()在你的申请开始时应该有助于解决这个问题。阅读本文的备注部分https://msdn.microsoft.com/en-us/library/system.windows.forms.listview.showgroups(v=vs.110).aspx https://msdn.microsoft.com/en-us/library/system.windows.forms.listview.showgroups(v=vs.110).aspx