C#利用BackgroundWorker延迟执行

需求说明：edt文本输入框中连续输入文本，如果两次字符输入的间隔小于60毫秒，则不进行指定函数的触发，反之则触发指定函数。可用于判断条码枪输入或人工输入。

private BackgroundWorker _inputWorker = new BackgroundWorker();

//属性赋值和事件绑定
_inputWorker.WorkerReportsProgress = true;
_inputWorker.WorkerSupportsCancellation = true;
_inputWorker.DoWork += InputWorker_DoWork;
_inputWorker.ProgressChanged += InputWorker_ProgressChangedHandler;
_inputWorker.RunWorkerCompleted += InputWorker_RunWorkerCompletedHandler;


        private void InputWorker_DoWork(object sender, DoWorkEventArgs e) {
            if (!(sender is BackgroundWorker worker)) {
                return;
            }

            try {
                Thread.Sleep(60);
                if (!_inputWorker.CancellationPending)
                    worker.ReportProgress(0);
            } catch (Exception ex) {
                _log.Error("InputWorker_DoWork 发生异常", ex);
            }
        }

        private void InputWorker_ProgressChangedHandler(object sender, ProgressChangedEventArgs args) {
            if (_inTxtChngTimer)
                return;
            _inTxtChngTimer = true;
            try {
                 /*
                    要延迟执行的操作
                 */
            } finally {
                try {
                    _inputWorker?.CancelAsync();
                } catch { }
                _inTxtChngTimer = false;
            }
        }

        private void InputWorker_RunWorkerCompletedHandler(object sender, RunWorkerCompletedEventArgs args) {
                  //完成之后执行的操作，这里没啥操作，可以不写
        }


   //窗体的keydown事件，如果按下回车，则执行回车之后的操作，中断_inputWorker的操作
private void Frm_KeyUp(object sender, KeyEventArgs e) {
  if (e.KeyCode == Keys.Enter){
      if (_inputWorker.IsBusy)
                    _inputWorker?.CancelAsync();
  }
}


//相关编辑框的Txtchange事件
private void TxtCodeTextChanged(object obj) {
            _inputWorker?.CancelAsync();//先停止
            if (!string.IsNullOrEmpty(edt.Text.ToString()) && !_inputWorker.IsBusy) {
                _inputWorker.RunWorkerAsync(); //通过条件判断再开启
            }
        }