Question

我在for循环中调用此代码，我需要这样做，因为进度取决于for循环值。

bgworker1.ReportProgress(k * count);

但我收到一个例外：

this operation has already had operation completed called on it and further calls are illegal

我该如何解决这个问题？

编辑：

private void bgworker1_DoWork(object sender, DoWorkEventArgs e)
{
 for (k = 1; k <= tcount; k++)
 {
  bgworker1.ReportProgress(k * count);
 }
}

private void bgworker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
    }

private void bgworker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        bgworker1.ReportProgress(k * count);
    }

Answer 1

您可以解决此问题的一种方法是报告此唯一任务的独占for循环中的进度，例如

private void bgworker1_DoWork(object sender, DoWorkEventArgs e)
{
    BackgroundWorker worker = sender as BackgroundWorker;

    for (int i = 1; i <= 100; i++)
    {
        if (worker.CancellationPending == true)
        {
            e.Cancel = true;
            break;
        }
        else
        {
            //Insert your logic HERE
            worker.ReportProgress(i * 1);
        }
    }
}

报告循环中的进度

1 个答案: