等到我的線程完成

Question

public delegate void FileEventHandler(string file);
public event FileEventHandler fileEvent;

public void getAllFiles(string path)
{
    foreach (string item in Directory.GetDirectories(path))
    {
        try
        {
            getAllFiles(item);
        }
        catch (Exception)
        { }
    }

    foreach (string str in Directory.GetFiles(path, "*.pcap"))
    {
        // process my file and if this file format OK raised event to UI and add the file to my listbox
        FileChecker fileChecker = new FileChecker();
        string result = fileChecker.checkFIle(str);
        if (result != null)
            fileEvent(result);
    }
}

private void btnAddDirInput_Click(object sender, EventArgs e)
{
        ThreadStart ts = delegate { getAllFiles(pathToSearch); };
        Thread thread = new Thread(ts);
        thread.IsBackground = true;
        thread.Start();
}

我想等到線程完成其工作，然后更新我的UI

Answer 1

您可以使用任務並行庫（而不是顯式任務）以及異步語言功能來輕松實現此目的：

private async void btnAddDirInput_Click(object sender, EventArgs e)
{
    await Task.Run(() => getAllFiles(pathToSearch));
    lable1.Text = "all done!";
}

Answer 2

為什么不使用任務？

await Task.Run(() => getAllFiles(pathToSearch));

您的方法將在單獨的線程上運行，從而釋放主線程以保持UI響應。 任務完成后，控件將返回到您的UI線程。

編輯：別忘了將您的button_click方法標記為async void