c# - 如何从另一个线程更新GUI？(How do I update the GUI from another thread?)

Question

What is the simplest way to update a Label from another thread?

(从另一个线程更新Label的最简单方法是什么？)

I have a Form on thread1 , and from that I'm starting another thread ( thread2 ).

(我在thread1上有一个Form ， thread1开始，我开始了另一个线程（ thread2 ）。)

While thread2 is processing some files I would like to update a Label on the Form with the current status of thread2 's work.

(当thread2处理某些文件时，我想使用thread2的当前状态更新Form上的Label 。)

How can I do that?

(我怎样才能做到这一点？)

  ask by CruelIO translate from so

Answer 1

The simplest way is an anonymous method passed into Label.Invoke :

(最简单的方法是将匿名方法传递给Label.Invoke ：)

// Running on the worker thread
string newText = "abc";
form.Label.Invoke((MethodInvoker)delegate {
    // Running on the UI thread
    form.Label.Text = newText;
});
// Back on the worker thread

Notice that Invoke blocks execution until it completes--this is synchronous code.

(请注意， Invoke阻止执行直到完成为止-这是同步代码。)

The question doesn't ask about asynchronous code, but there is lots of content on Stack Overflow about writing asynchronous code when you want to learn about it.

(这个问题并没有询问异步代码，但是您想了解异步代码时，Stack Overflow上有很多内容涉及编写异步代码。)