BackgroundWorker的多线程访问形式 [英] BackgroundWorker multithread access to form

问题描述

我使用的同时有一定目的的运行5 BackgroundWorker的对象，所有的人都更改相同的标签。我该怎么做呢？

I am using 5 BackgroundWorker objects running at the same time for a certain purpose, and all of them have to change the same label. How do I do that?

如何修改然后从多个线程的形式？我如何做到这一点的情况下，我想改变一个公共字符串？

How do I modify the form from more than one thread then? And how do i do it in case i want to change a public string?

推荐答案

使用Control.Invoke了委托。

Use Control.Invoke with a delegate.

在你的背景工作者线程，而不是说

In your background worker thread, instead of saying

label4.Text = "Hello";

说

say

label4.Invoke(new Action(() =>
{
  label4.Text = "Hello";
}
));

里面的一切控件的线程上{}执行，让您避免例外。

Everything inside the { } executes on the control's thread, so you avoid the exception.

这允许你这样做从的BackgroundWorker ，而不是仅仅报告进度的用户界面任意更改。

This allows you to do arbitrary changes to your user interface from a BackgroundWorker rather than just reporting progress.

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