private void Scan(object sender, RoutedEventArgs e)
{
try
{
AppBarButton button = sender as AppBarButton;
// hmmm, reusing the device doesn't work because it somehow resets itself to capture higher resolution images.
bool hasDevice = false; // device != null;
GetScannerAsync(new Action(() =>
{
WIA.ImageFile imageFile = null;
if (!hasDevice)
{
imageFile = globalDialog.ShowAcquireImage(DeviceType: WIA.WiaDeviceType.ScannerDeviceType,
Bias: WIA.WiaImageBias.MinimizeSize, Intent: WIA.WiaImageIntent.TextIntent, AlwaysSelectDevice: false);
}
else
{
WIA.Item scannerItem = device.Items[1];
const string wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}";
object scanResult = globalDialog.ShowTransfer(scannerItem, wiaFormatPNG, false);
imageFile = (WIA.ImageFile)scanResult;
}
if (imageFile != null)
{
string temp = System.IO.Path.GetTempFileName();
if (File.Exists(temp))
{
File.Delete(temp);
}
imageFile.SaveFile(temp);
TempFilesManager.AddTempFile(temp);
AttachmentDialogImageItem image = new AttachmentDialogImageItem(temp);
AddItem(image);
LayoutContent();
SelectItem(image);
AutoCrop(image);
}
}));
}
catch (Exception ex)
{
device = null;
string message = GetWiaErrorMessage(ex);
MessageBox.Show(this, message, "Scan Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
void scan(string scannerId)
{
scanner = null;
foreach (WIA.DeviceInfo devInfo in manager.DeviceInfos)
{
if (devInfo.DeviceID == scannerId)
{
scanner = devInfo.Connect();
}
}
if (scanner == null)
{
throw new Exception("Selected scanner is unavailable!");
}
WIA.Item item = scanner.Items[1];
try
{
commonDialog = null;
commonDialog = new WIA.CommonDialog();
scanInit();
scannedImage = (WIA.ImageFile)commonDialog.ShowTransfer(item, wiaFormatBMP, false);
imageBytes = (byte[])scannedImage.FileData.get_BinaryData();
MemoryStream ms = new MemoryStream(imageBytes);
image = Image.FromStream(ms);
pbScannedImage.Image = image;
}
catch (Exception e)
{
throw e;
}
finally
{
Marshal.ReleaseComObject(scannedImage);
}
}
