在BackgroundWorker的doWork事件中使用Console.WriteLine [英] Using Console.WriteLine in a BackgroundWorker doWork event

问题描述

我有一个控制台应用程序，它利用BackgroundWorker对象，并想使用Console.WriteLine（fooBar）测试我的输出。但是，该应用程序会在应用程序执行Console.WriteLine命令时退出。

I have a console application that utilizes the BackgroundWorker object and wanted to test my output with a Console.WriteLine(fooBar). However, that application exits as the application executes the Console.WriteLine command.

这是一个watered down版本，说明了我想做什么：

Here's a watered down version that illustrates what I wanted to do:

protected static void bWorker_DoWork(object sender, DoWorkEventArgs e)
{
    for (int i = startId; i <= endId; i++)
    {
        Console.WriteLine(i.ToString());
        Thread.Sleep(1000);
    }
}

任何想法为什么应用程序看起来像这样退出 c> 设置 WorkerReportsProgress

Any ideas why the application would appear to exit like that?

推荐答案

到 true 。订阅 ProgressChanged 这样的事件：

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    for (var i = 0; i < 1000; i++)
    {
        backgroundWorker1.ReportProgress(i);
    }
}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    Console.WriteLine(e.ProgressPercentage);
}

如果你需要传递多个int从你的后台线程到UI线程，那么你可以这样做：

If you need to transfer more than just int from your background thread to UI thread, then you could do something like this:

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    for (var i = 0; i < 1000; i++)
    {
        var myObjectInstance = new MyObject{ ...};
        backgroundWorker1.ReportProgress(null, myObjectInstance);
    }
}

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    var myObjectInstance = (MyObject)e.UserState;
    Console.WriteLine(myObjectInstance);
}

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