如何从另一个线程更新 GUI? [英] How do I update the GUI from another thread?

问题描述

从另一个 Thread 更新 Label 的最简单方法是什么?

Which is the simplest way to update a Label from another Thread?

• 我有一个 Form 在 thread1 上运行，然后我开始另一个线程 (thread2).

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

当 thread2 正在处理一些文件时，我想用 的当前状态更新 Form 上的 Label>thread2 的工作.

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

我怎么能这样做?

推荐答案

最简单的方式是将匿名方法传递给 Label.Invoke:

The simplest way is an anonymous method passed into 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

注意 Invoke 会阻塞执行直到它完成——这是同步代码.这个问题不问异步代码，但有很多关于堆栈溢出的内容 关于在您想了解异步代码时编写异步代码.

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

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