CollectionEditor更改集合后使表单失效

Question

我有用户控件，其中包含一个名为“ToolbarButton”的对象列表。 ToolbarButton表示将添加到用户控件的用户按钮。

我的班级看起来像这样

public partial class Toolbar : UserControl
    {
        private MyCollection<ToolbarButton> _buttons = new MyCollection<ToolbarButton>();

        public Toolbar()
        {
            InitializeComponent();

            ToolbarCollectionEditor.toolbar = this;
        }

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [Editor(typeof(ToolbarCollectionEditor),
                       typeof(System.Drawing.Design.UITypeEditor))]
        public MyCollection<ToolbarButton> Buttons
        { 
            get
            {
                return _buttons;
            }

        }

    }

如您所见，我还实现了集合编辑器，以便我可以在设计时修改列表。

这一切都运行正常，我遇到的问题是在对列表进行更改时让控件重绘。我尝试添加一个事件来监听对象列表的更改（我的自定义列表类名为MyCollection），但因为CollectionEditor似乎只是重写了设计器代码而没有刷新它，所以它没有用。

谁能告诉我怎么做到这一点？最后，我希望能够单击Collection Editor中的Add按钮，让控件刷新并显示我添加的新按钮。

提前致谢！

更新

我创建了自己的CollectionEditor

class ToolbarCollectionEditor : CollectionEditor
    {
        public ToolbarCollectionEditor(Type type) : base(type) { }

        public static Toolbar toolbar;

        protected override CollectionForm CreateCollectionForm()
        {
            CollectionForm collectionForm = base.CreateCollectionForm();

            collectionForm.FormClosed += new FormClosedEventHandler(collectionForm_FormClosed);
            collectionForm.Load += new EventHandler(collectionForm_Load);

            if (collectionForm.Controls.Count > 0)
            {
                TableLayoutPanel mainPanel = collectionForm.Controls[0] 
                    as TableLayoutPanel;

                if ((mainPanel != null) && (mainPanel.Controls.Count > 7))
                {
                    // Get a reference to the inner PropertyGrid and hook 
                    // an event handler to it.
                    PropertyGrid propertyGrid = mainPanel.Controls[5] 
                        as PropertyGrid;
                    if (propertyGrid != null)
                    {
                        propertyGrid.PropertyValueChanged += 
                            new PropertyValueChangedEventHandler(
                                propertyGrid_PropertyValueChanged);
                    }

                    // Also hook to the Add/Remove
                    TableLayoutPanel buttonPanel = mainPanel.Controls[1] 
                        as TableLayoutPanel;
                    if ((buttonPanel != null) && (buttonPanel.Controls.Count > 1))
                    {
                        Button addButton = buttonPanel.Controls[0] as Button;
                        if (addButton != null)
                        {
                            addButton.Click += new EventHandler(addButton_Click);
                        }
                        Button removeButton = buttonPanel.Controls[1] as Button;
                        if (removeButton != null)
                        {
                            removeButton.Click += 
                                new EventHandler(removeButton_Click);
                        }
                    }
                }
            }
        return collectionForm;
        }

        private static void collectionForm_FormClosed(object sender, 
            FormClosedEventArgs e)
        {
            toolbar.RedrawButtons();
        }

        private static void collectionForm_Load(object sender, EventArgs e)
        {
        }

        private static void propertyGrid_PropertyValueChanged(object sender,
            PropertyValueChangedEventArgs e)
        {
        }

        private static void addButton_Click(object sender, EventArgs e)
        {
            toolbar.RedrawButtons();
        }

        private static void removeButton_Click(object sender, EventArgs e)
        {
            toolbar.RedrawButtons();
        }


    }