如何使用参数等待线程并且不冻结主线程

Question

我编写代码，用参数调用线程。但我的程序是Windows窗体。那么改变代码，等待线程和程序的GUI如何不冻结？

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

Answer 1

如果您没有await可用，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，因此您可以在那里更新您的UI（而不是DoWork中发生的事情）。