c# - 等到我的线程结束

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();
}

我想等到线程完成它的工作然后更新我的 UI

Answer 1

您可以使用任务并行库(而不是显式任务)以及异步语言功能来非常轻松地完成此任务:

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