private void BnSetParam_Click(object sender, EventArgs e)
        {
            string gainshow     = null;
            string exposureshow = null;

            if ((chooseHIK) && (!chooseBasler))
            {
                float exposure = float.Parse(tbExposure.Text);
                float gain     = float.Parse(tbGain.Text);
                hIKVisionCamera.SetParam(gain, exposure, ref gainshow, ref exposureshow, camera2);
                // 显示真实值
                tbGain.Text     = gainshow;
                tbExposure.Text = exposureshow;
            }
            else if ((chooseBasler) && (!chooseHIK))
            {
                long exposure = long.Parse(tbExposure.Text);
                long gain     = long.Parse(tbGain.Text);
                baslerCamera.SetParam(gain, exposure, ref gainshow, ref exposureshow, camera1);
                // 显示真实值
                tbGain.Text     = gainshow;
                tbExposure.Text = exposureshow;
            }
            else if (chooseUSB && (!chooseBasler) && (!chooseHIK))
            {
                this.camera3.DisplayPropertyPage(IntPtr.Zero);
                //bool a = this.usbDeviceSource.SetCameraProperty(
                // CameraControlProperty.Exposure, int.Parse(tbExposure.Text.Trim()),
                // CameraControlFlags.Manual);//曝光值
                //bool b = this.usbDeviceSource.videoSource.SetCameraProperty(
                // CameraControlProperty.Zoom, int.Parse(tbGain.Text.Trim()),
                // CameraControlFlags.Manual);
                //MessageBox.Show(a+" "+b);
            }
        }
        private void BnSetParam_Click(object sender, EventArgs e)
        {
            string gainshow     = null;
            string exposureshow = null;

            if ((chooseHIK) && (!chooseBasler))
            {
                float exposure = float.Parse(tbExposure.Text);
                float gain     = float.Parse(tbGain.Text);
                hIKVisionCamera.SetParam(gain, exposure, ref gainshow, ref exposureshow, camera2);
                // 显示真实值
                tbGain.Text     = gainshow;
                tbExposure.Text = exposureshow;
            }
            else if ((chooseBasler) && (!chooseHIK))
            {
                long exposure = long.Parse(tbExposure.Text);
                long gain     = long.Parse(tbGain.Text);
                baslerCamera.SetParam(gain, exposure, ref gainshow, ref exposureshow, camera1);
                // 显示真实值
                tbGain.Text     = gainshow;
                tbExposure.Text = exposureshow;
            }
        }