在Windows 8桌面应用上使用MediaCapture

在Windows 8桌面应用程序中，我需要使用C＃4.5中的相机拍摄照片。

我曾尝试使用CameraCaptureUI类，但它不适用于桌面应用程序。

所以我尝试使用MediaCapture类，它可用于Metro应用程序或桌面应用程序。 它的工作原理非常好，基于此处的示例： http ： //code.msdn.microsoft.com/windowsapps/media-capture-sample-adf87622/

var capture = new MediaCapture(); // Find the camera device id to use string deviceId = ""; var devices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(Windows.Devices.Enumeration.DeviceClass.VideoCapture); for (var i = 0; i < devices.Count; i++) { Console.WriteLine(devices[i]); deviceId = devices[i].Id; } // init the settings of the capture var settings = new MediaCaptureInitializationSettings(); settings.AudioDeviceId = ""; settings.VideoDeviceId = deviceId; settings.PhotoCaptureSource = Windows.Media.Capture.PhotoCaptureSource.Photo; settings.StreamingCaptureMode = Windows.Media.Capture.StreamingCaptureMode.Video; await capture.InitializeAsync(settings); // Find the highest resolution available VideoEncodingProperties resolutionMax = null; int max = 0; var resolutions = capture.VideoDeviceController.GetAvailableMediaStreamProperties(MediaStreamType.Photo); for (var i = 0; i  max) { max = (int)(res.Width * res.Height); resolutionMax = res; } } await capture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.Photo, resolutionMax); ImageEncodingProperties imageProperties = ImageEncodingProperties.CreateJpeg(); var fPhotoStream = new InMemoryRandomAccessStream(); // THE 2 LINES I NEED TO ADD // captureElement.Source = capture; // await capture.StartPreviewAsync(); // Take the photo and show it on the screen await capture.CapturePhotoToStreamAsync(imageProperties, fPhotoStream); await fPhotoStream.FlushAsync(); fPhotoStream.Seek(0); byte[] bytes = new byte[fPhotoStream.Size]; await fPhotoStream.ReadAsync(bytes.AsBuffer(), (uint)fPhotoStream.Size, InputStreamOptions.None); BitmapImage bitmapImage = new BitmapImage(); MemoryStream byteStream = new MemoryStream(bytes); bitmapImage.BeginInit(); bitmapImage.StreamSource = byteStream; bitmapImage.EndInit(); image.Source = bitmapImage; 

我可以使用相机拍照，但拍照前我无法显示预览。 为了能够显示预览，我必须使用组件CaptureElement，例如使用以下代码：

 captureElement.Source = mediaCapture; await mediaCapture.startPreviewAsync(); 

不幸的是，我无法在非商店应用上使用CaptureElement。 我可以在WPF或WinForm应用程序中使用另一个组件，以便能够显示摄像头的预览吗？

 _ms.Seek(0); var _bmp = new BitmapImage(); _bmp.SetSource(_ms); preview1.Source = _bmp;