C#跨线程操作无效[重复]

Question

可能重复：
Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on.

我收到一条错误消息 - 谁能给我一些指示。

跨线程操作无效：从 a 访问的控件“pbx_1” 线程不是创建它的线程。

我看过这里，但我似乎无法让它工作。我对 c# 很陌生，所以我可能遗漏了一些东西。

 Console.WriteLine("backgroundWorker1");
 while (!backgroundWorker1.CancellationPending) {
     Thread.Sleep(100);
     if (pbx_1.Location.X < Click_X) {
         pbx_1.Location = new Point(20, pbx_1.Location.X + MoveAmt);
     }

     if (pbx_1.Location.X > Click_X) {
         pbx_1.Location = new Point(20, pbx_1.Location.X - MoveAmt);
     }

     backgroundWorker1.ReportProgress(1);
 }

Answer 1

你应该调用backgroundWorker1.ReportProgress(1);，因为只有 UI 线程可以直接访问 UI 控件。调用示例：

private delegate void AddListBoxItemDelegate(object item);

private void AddListBoxItem(object item)
{
   if (this.listBox1.InvokeRequired)
   {
       // This is a worker thread so delegate the task.
       this.listBox1.Invoke(new AddListBoxItemDelegate(this.AddListBoxItem), item);
   }
   else
   {
       // This is the UI thread so perform the task.
       this.listBox1.Items.Add(item);
   }
}