C＃BackgroundWorker的报告字符串？ [英] C# backgroundWorker reports string?

问题描述

如何举报一个字符串（如正在搜索文件。，找到的选择。）回到从一个BackgroundWorker我windows.form以及一个百分比。另外，我有一个包含我想在backgroundWorker_Work运行的方法的一大类。我可以通过Class_method（）调用它;但我再无力报告我完成百分比或任何来自所谓的类，只能从backgroundWorker_Work方法。

How can I report a string (like "now searching file. . .", "found selection. . .") back to my windows.form from a backgroundWorker as well as a percentage. Additionally, I have a large class that contains the method I want to run in the backgroundWorker_Work. I can call it by Class_method(); but i am then unable to report my percentage done or anything from the called class, only from the backgroundWorker_Work method.

谢谢！

推荐答案

我假设WCF也有方法

public void ReportProgress(int percentProgress, Object userState);

所以只需使用userState报告字符串。

So just use the userState to report the string.

private void worker_DoWork(object sender, DoWorkEventArgs e)
{
 //report some progress
 e.ReportProgress(0,"Initiating countdown");

// initate the countdown.
}

你会得到启动倒计时串回来ProgressChanged事件

And you'll get that "Initiating countdown" string back in ProgressChanged event

private void worker_ProgressChanged(object sender,ProgressChangedEventArgs e) 
{
  statusLabel.Text = e.UserState as String;
}

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