Question

我得到了一些非常简单的代码，但无法让它工作。我正在使用BackgroundWorker。问题是RunWorkerCompleted是以快速方式解决的。运行后立即我收到消息“工作完成”，但应用程序仍然冻结了几秒钟，因为'DataType data = new DataType（path）;'是执行的。之后，我正确填充了所有DataGridViews等。如果我用Thread.Sleep交换这一行，一切似乎都运行良好。有什么想法吗？

    public frmWindow(string path)
    {
       InitializeComponent();
       DataType d;
       backgroundWorker1.RunWorkerAsync(path);
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
       string path = e.Argument as string;
       DataType data = new DataType(path);
       e.Result = data;            
    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
       d = e.Result as DataType;
       MessageBox.Show("Work completed");
    }

Answer 1

如何使用Debug.Write代替带有计时器的MessageBox.Show来显示何时输入和退出方法。

虽然这个相同的后台线程可以在你的UI上运行，但它几乎总是不是一件好事 - UI不是线程安全的。

BackgroundWorker backGroundWorker1;
        public frmWindow(string path)
        {
            InitializeComponent();
            DataType d;

            backGroundWorker1 = new BackgroundWorker();

            backGroundWorker1.DoWork += (s, e) =>
            {
                System.Diagnostics.Debug.Write("Work started at: " + DateTime.Now + Environment.NewLine);
                string path = e.Argument as string;
                DataType data = new DataType(path);
                e.Result = data;
            };

            backGroundWorker1.RunWorkerCompleted += (s, e) =>
            {
                d = e.Result as DataType;
                System.Diagnostics.Debug.Write("Work completed at: " + DateTime.Now + Environment.NewLine);
            };

            backGroundWorker1.RunWorkerAsync();

        }

RunWorkerCompleted射击太快

1 个答案: