c＃BeginInvoke不起作用

Question

我有这段代码

private delegate void InvokeDelegate();

private void OpenFormNewNote(object sender, FileSystemEventArgs e)
{
    if(loop == 2)
    {
        string service = null;
        if (currentServiceName != null)
        {
            service = currentServiceName.Replace(" ", "");
        }
        NewNotePanel newNote = new NewNotePanel(e.FullPath, service, listOfService, Path, MyConn, ipAddress, imgFolder, Utente_id);
        newNote.TopMost = true;
        watcher.EnableRaisingEvents = false;
        var result = newNote.ShowDialog();
        if(result == DialogResult.OK || result == DialogResult.Cancel)
        {
            watcher.EnableRaisingEvents = true;
            if(result == DialogResult.OK)
            {
                this.BeginInvoke(new InvokeDelegate(Refresh));
            }
        }
        loop = 0;
    }
    else
    {
        loop++;
    }
}

这是Refresh（）函数：

public void Refresh()
{

    noteContainer.Controls.Clear();
    page = 0;
    try
    {
        string Query = "SELECT a, v, b, cFROM note Where Servizio_ID = " + asd+ " AND Visibile = 1 order by ID desc limit 15 OFFSET " + (pageIndex * page) + " ;";
        MySqlCommand MyCommand = new MySqlCommand(Query, MyConn);
        MySqlDataReader MyReader;
        if (MyConn.State == ConnectionState.Open)
        {
            MyReader = MyCommand.ExecuteReader();// Here our query will be executed and data saved into the database.  

            while (MyReader.Read())
            {

                CreateNotePreview(MyReader.GetString("a"), MyReader.GetString("b"), MyReader.GetString("c"), MyReader.GetString("d"));
            }
            MyReader.Close();
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

由于在触发FileSystemWatcher的“Change”事件时调用了OpenFormNewNote ...当然它在一个独立的线程上运行。而不是Refresh（）做一些UI的东西，它不能直接从OpenFormNewNote（）调用，否则它给出一个跨线程异常。所以我尝试使用委托，但是当代码流到达BeginInvoke部分时..没有任何反应，并且不会调用Refresh函数。

我该怎么办？