c# - 持续运行 BackgroundWorker

Question

我需要能够持续运行我的 BackgroundWorker。 DoWork 事件包含池线程进程，OnComplete 更新我的 UI。

我无法找到一种方法来无限循环 BackgroundWorker.RunWorkerAsync() 方法而不卡住整个程序。任何帮助将不胜感激。

Answer 1

您必须在 DoWork-Method 中创建一个循环。要更新您的 UI，您应该使用 ProgressChanged-Method。这是一个小例子，这看起来像

 public Test()
    {
        this.InitializeComponent();
        BackgroundWorker backgroundWorker = new BackgroundWorker
            {
                 WorkerReportsProgress = true,
                WorkerSupportsCancellation = true
            };
        backgroundWorker.DoWork += BackgroundWorkerOnDoWork;
        backgroundWorker.ProgressChanged += BackgroundWorkerOnProgressChanged;
    }

    private void BackgroundWorkerOnProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        object userObject = e.UserState;
        int percentage = e.ProgressPercentage;
    }

    private void BackgroundWorkerOnDoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = (BackgroundWorker) sender;
        while (!worker.CancellationPending)
        {
            //Do your stuff here
            worker.ReportProgress(0, "AN OBJECT TO PASS TO THE UI-THREAD");
        }        
    }