C＃Backgroundworker Console寫行

Question

我有一個簡單的Backgroundworker，想將結果寫入控制台，也想報告該過程。

 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，如何將我的String（或大於1的String）提供給ReportProcess函數？

Answer 1

您沒有將事件處理程序分配給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

您要將計數器作為第一個（int percentProgress）參數傳遞給ReportProgress，您可以使用e.ProgressPercentage如下例所示訪問該參數。 您還可以傳遞第二個（對象userState）參數，該參數可以是字符串或任何其他對象，如下面的示例所示，使用e.UserState訪問。

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;
}

請參見https://msdn.microsoft.com/zh-cn/library/system.windows.forms.toolstripprogressbar(v=vs.110).aspx的完整示例