C＃跨線程操作無效

Question

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

我得到一個錯誤信息 - 任何人都可以給我一些指點。

跨線程操作無效：控制「pbx_1」從比它創建的線程以外的 線程訪問。

我已經在這裏看過，但我似乎無法得到它的工作。我對c＃很陌生，所以我可能錯過了一些東西。

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

您應該調用backgroundWorker1.ReportProgress(1);，因爲只有UI線程可以直接訪問UI控件。調用示例：

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); 
    } 
}