这BackgroundWorker的正忙，不能同时运行多个任务 [英] This BackgroundWorker is currently busy and cannot run multiple tasks concurrently

问题描述

如果我点击一个按钮，两次启动的BackgroundWorker我得到这个错误。

I get this error if I click a button that starts the backgroundworker twice.

This BackgroundWorker is currently busy and cannot run multiple tasks concurrently

我怎样才能避免这种情况？

How can I avoid this?

推荐答案

简单：不要启动的BackgroundWorker两次

Simple: Don't start the BackgroundWorker twice.

您可以检查它是否已被使用运行 IsBusy 属性，因此只需更改此代码：

You can check if it is already running by using the IsBusy property, so just change this code:

worker.RunWorkerAsync();

这样：

to this:

if( !worker.IsBusy )
    worker.RunWorkerAsync();
else
    MessageBox.Show("Can't run the worker twice!");

更​​新：

Update:

如果你这样做实际上需要在同一时间启动多个后台任务，你可以简单地创建多个BackgroundWorker的对象

If you do actually need to launch multiple background tasks at the same time, you can simply create multiple BackgroundWorker objects

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