Question

好的，我已经四处寻找，但找不到合适的答案。我有一个相当复杂的代码库，它使用Timer来启动后台工作程序的创建，以定期传输内容。

我在调用ReportProgress时遇到问题： “此操作已经调用了OperationCompleted，进一步调用是非法的。”

堆栈追踪：

at System.ComponentModel.AsyncOperation.VerifyNotCompleted()
at System.ComponentModel.AsyncOperation.Post(SendOrPostCallback d, Object arg)
at System.ComponentModel.BackgroundWorker.ReportProgress(Int32 percentProgress, Object userState)
at NAME.TX.Work(Object sender, DoWorkEventArgs e) in file.cs:line 68
at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)

我的问题相对简单，当计时器关闭时调用的函数会创建一个新的后台工作者，但它实际上是一个新的后台工作者吗？

我的代码（简化因为它非常笨重）：

//THIS IS THE FUNCTION CALLED BY TIMER
public void TransmitMSG(MSG msg)
{
        //Initialze _tx
        this.m_thread = new BackgroundWorker();
        m_thread.WorkerReportsProgress = true;

        //Initialize all events used by _tx
        m_thread.DoWork += new DoWorkEventHandler(this.Work);
        m_thread.ProgressChanged += new ProgressChangedEventHandler(this.Report);
        m_thread.RunWorkerCompleted += new RunWorkerCompletedEventHandler(this.Complete);

        //Run the backgroundworker
        m_thread.RunWorkerAsync(msg);
}

//THIS IS THE WORK FUNCTION
public override void Work(object sender, DoWorkEventArgs e)
    {
        //This code is in the TX Thread
        //The sender should be the a BackgroundWorker
        BackgroundWorker _tx = sender as BackgroundWorker;

        //Check the Argument
        if (e.Argument != null && e.Argument.GetType() == typeof(MSG))
        {
            //Transmit the Argument Message
            m_THING.Transmit((MSG)e.MSG)

            //Report progress according to the result
            _tx.ReportProgress(CONSTANTS.PROGRESS.SUCCESS_TX, (MSG)e.Argument);
        }
    }

Work函数是一个覆盖，因为有一个更高的处理类允许传输和接收，这两个继承自同一个类，所以我可以有常见的ReportProgress和Close方法。

关于后台工作者的实施/使用

0 个答案: