如何等待带有参数的线程并且不冻结主线程

Question

我写的代码，调用线程的参数。但我的程序是windows窗体。那么，如何更改代码，等待线程和程序的GUI不冻结呢?

var t=new Thread(()=>SomeMethod(SomeParameter));
t.Start();
//t.Wait?

Answer 1

如果您没有可用的await，最简单的解决方案是使用BackgroundWorker:

var bw = new BackgroundWorker();
bw.DoWork += (sender, args) => {
    // do your lengthy stuff here -- this will happen in a separate thread
    ...
}
bw.RunWorkerCompleted += (sender, args) => {
    if (args.Error != null)  // if an exception occurred during DoWork,
        MessageBox.Show(args.Error.ToString());  // do your error handling here
    // Put here the stuff you wanted to put after `t.Wait`
    ...
}
bw.RunWorkerAsync(); // start the background worker

RunWorkerCompleted在UI线程中运行，因此您将能够在那里更新您的UI(与DoWork中发生的事情相反)。