向背景工作者发送参数？

您可以这样启动：

int value = 123;bgw1.RunWorkerAsync(argument: value);  // the int will be boxed

然后

private void worker_DoWork(object sender, DoWorkEventArgs e) {   int value = (int) e.Argument;   // the 'argument' parameter resurfaces here   ...   // and to transport a result back to the main thread   double result = 0.1 * value;   e.Result = result;}// the Completed handler should follow this pattern // for Error and (optionally) Cancellation handlingprivate void worker_Completed(object sender, RunWorkerCompletedEventArgs e) {  // check error, check cancel, then use result  if (e.Error != null)  {     // handle the error  }  else if (e.Cancelled)  {     // handle cancellation  }  else  {     double result = (double) e.Result;      // use it on the UI thread  }  // general cleanup pre, runs when there was an error or not.}