Question

我有一个简单的Backgroundworker，想把我的结果写到控制台，我也想报告这个过程。

 class Program
    {
        private static BackgroundWorker worker;
        static int counter;

        static void Main(string[] args)
        {
            worker = new BackgroundWorker();
            worker.WorkerReportsProgress = true;
            worker.RunWorkerAsync();
            Console.ReadLine();
        }

        static void worker_DoWork(object sender, DoWorkEventArgs e)
        {
            while (true)
            {
                counter++;
                worker.ReportProgress(counter);
            }
        }

        static void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            Console.WriteLine(counter);
        }

        static void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {

        }    
    }

但是如何将我的String（或多于1个字符串）提供给我的ReportProcess函数？

Answer 1

您没有将事件处理程序分配给BackgroundWorker事件：

    static void Main(string[] args)
    {
        worker = new BackgroundWorker();
        worker.DoWork += Worker_DoWork; //here
        worker.ProgressChanged += Worker_ProgressChanged; //and here
        worker.WorkerReportsProgress = true;
        worker.RunWorkerAsync();
        Console.ReadLine();
    }

干杯

Answer 2

您将计数器作为第一个（int percentProgress）参数传递给ReportProgress，您可以使用e.ProgressPercentage访问该示例，如下例所示。您还可以传递第二个（对象userState）参数，该参数可以是字符串或任何其他对象，使用e.UserState访问，如下例所示。

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    backgroundWorker.ReportProgress(100, "Complete!");
}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    toolStripProgressBar.Value = e.ProgressPercentage;
    toolStripStatusLabel.Text = e.UserState as String;
}

请参阅https://msdn.microsoft.com/en-us/library/system.windows.forms.toolstripprogressbar(v=vs.110).aspx

上的完整示例

C＃Backgroundworker ConsoleWriteline

2 个答案: