ImageScanner.ScanPreviewToStreamAsync Method
Definition
Important
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Scans one image from the specified scan source and applies the lowest scan resolution with the selected image file format.
public:
virtual IAsyncOperation<ImageScannerPreviewResult ^> ^ ScanPreviewToStreamAsync(ImageScannerScanSource scanSource, IRandomAccessStream ^ targetStream) = ScanPreviewToStreamAsync;/// [Windows.Foundation.Metadata.RemoteAsync]
IAsyncOperation<ImageScannerPreviewResult> ScanPreviewToStreamAsync(ImageScannerScanSource const& scanSource, IRandomAccessStream const& targetStream);[Windows.Foundation.Metadata.RemoteAsync]
public IAsyncOperation<ImageScannerPreviewResult> ScanPreviewToStreamAsync(ImageScannerScanSource scanSource, IRandomAccessStream targetStream);function scanPreviewToStreamAsync(scanSource, targetStream)Public Function ScanPreviewToStreamAsync (scanSource As ImageScannerScanSource, targetStream As IRandomAccessStream) As IAsyncOperation(Of ImageScannerPreviewResult)Parameters
- scanSource
- ImageScannerScanSource
The image scan source.
- targetStream
- IRandomAccessStream
The scanned image file.
Returns
The progress of the scan and the scanned file format.
- Attributes
Remarks
Attempting to preview from a feeder that supports preview but is empty at the time will result in a successful completion of the async call. The app should check for the returned ImageScannerPreviewResult.Succeeded result before attempting to read data from the stream, especially when scanning from the feeder.