如何在ASP.NET中使用DPUruNet订阅指纹读取器的onCapture？

Question

我在asp.net中为我的项目使用了DPUruNet库。我可以阅读并打开指纹设备。问题是我无法连续触发CaptureAsync。我只能在page_load中触发一次。当我的页面要求它等待捕获时，有人知道如何订阅此事件吗？看来我无法连续调用此事件。我只能在asp页面的页面加载中访问它，当我尝试发送信号时不会触发

reader.On_Captured += new Reader.CaptureCallback(reader_On_Captured);

void reader_On_Captured(CaptureResult capResult)
        {
            if (capResult.Quality == Constants.CaptureQuality.DP_QUALITY_GOOD)
            {
                count++;
                DataResult<Fmd> fmd = FeatureExtraction.CreateFmdFromFid(capResult.Data, Constants.Formats.Fmd.DP_PRE_REGISTRATION);

                // Get view bytes to create bitmap.
                foreach (Fid.Fiv fiv in capResult.Data.Views)
                {
                    //Ask user to press finger to get fingerprint
                    //UpdateEnrollMessage("Click save button to save fingerprint", //HelperFunctions.CreateBitmap(fiv.RawImage, fiv.Width, fiv.Height));
                    break;
                }
            }
        }