C#基于事件异步模式的实现2（续）

1、代码

private void button2_Click(object sender, EventArgs e){listBox1.Items.Add($"The thread id is {Thread.CurrentThread.ManagedThreadId}");BackgroundWorker worker = new BackgroundWorker();worker.DoWork += new DoWorkEventHandler((s1, s2) =>{Thread.Sleep(2000);ListBoxAcrossDomain(listBox1,$"The asynchronous thread id is {Thread.CurrentThread.ManagedThreadId}");});listBox1.Items.Add($"The test is start");//注册事件来实现异步worker.RunWorkerAsync(this);listBox1.Items.Add($"The test is end");}public static void ListBoxAcrossDomain(ListBox listBox,string text){if(listBox == null) return;if(listBox.InvokeRequired){listBox.Invoke(new Action(() => { listBox.Items.Add(text); }));}else{listBox.Items.Add(text);}}

2、运行结果