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.}
