C#线程安全调用动态创建的控件

时间:2012-10-07 04:55:06

标签: c# multithreading user-controls delegates thread-safety

我知道如何对用户控件执行线程安全调用,但是当它们动态生成时我没有线索。我尝试制作它们的数组列表(富文本框),之后我遇到了'参数启动线程'委托的问题。非常感谢您的投入。

    private void SetText(string text)
    {
        // InvokeRequired required compares the thread ID of the 
        // calling thread to the thread ID of the creating thread. 
        // If these threads are different, it returns true. 
        if (this.currentBox.InvokeRequired)
        {
            SetTextCallback d = new SetTextCallback(SetText);
            this.Invoke( d, new object[] { text } );
        }
        else
        {
            this.currentBox.Text += text;
        }
    }

  // This method is executed on the worker thread and makes 
    // a thread-safe call on the TextBox control. On a specific text box.....
    private void ThreadProcSafe()
    {
        int i = 0;
        while(_stop_threads == false) {
            this.SetText(String.Format("{0}\n", i));

            ++i;
            Thread.Sleep(100);
        }

        this.SetText(String.Format("Thread Time: {0}:{1}:{2}\n", DateTime.Now.TimeOfDay.Hours, DateTime.Now.TimeOfDay.Minutes, DateTime.Now.TimeOfDay.Seconds)); 

    }

1 个答案:

答案 0 :(得分:1)

问题是,虽然每个UI控件都有一个单独的线程,但该窗体在单个线程下工作。因此,从单独的线程更新UI控件是不安全的。

也许您可以从这些线程填充字典或数组,并在Form的单线程下更新该数组的结果。这样,您将从更新的值数组中同时更新所有UI控件。它是线程安全的,并且它消耗更少的系统资源。