private void BotonCapturarImagen_Click(object sender, EventArgs e)
{
try {
var WiaDialog = new WIA.CommonDialog();
WIA.ImageFile WiaImage = null;
WiaImage = WiaDialog.ShowAcquireImage(
WIA.WiaDeviceType.UnspecifiedDeviceType,
WIA.WiaImageIntent.ColorIntent,
WIA.WiaImageBias.MaximizeQuality,
System.Drawing.Imaging.ImageFormat.Jpeg.Guid.ToString("B"), true, false, false);
if (WiaImage != null)
{
var vector = WiaImage.FileData;
using (var Recorte = new Entrada.AuxForms.ImagenRecorte()) {
Recorte.Imagen = System.Drawing.Image.FromStream(new System.IO.MemoryStream((byte[])vector.get_BinaryData()));
if (Recorte.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
EntradaImagen.Image = Recorte.Imagen;
this.Changed = true;
this.ActualizarElemento();
}
}
}
} catch (Exception ex) {
Lui.Forms.MessageBox.Show("No se puede conectar con el dispositivo de captura. " + ex.Message, "Error");
}
}
/// <summary>
/// Use scanner to scan an image (scanner is selected by its unique id).
/// </summary>
/// <param name="scannerName"></param>
/// <returns>Scanned images.</returns>
public static List <Image> Scan(string scannerId)
{
List <Image> images = new List <Image>();
bool hasMorePages = true;
while (hasMorePages)
{
// select the correct scanner using the provided scannerId parameter
WIA.DeviceManager manager = new WIA.DeviceManager();
WIA.Device device = null;
foreach (WIA.DeviceInfo info in manager.DeviceInfos)
{
if (info.DeviceID == scannerId)
{
// connect to scanner
device = info.Connect();
break;
}
}
// device was not found
if (device == null)
{
// enumerate available devices
string availableDevices = string.Empty;
foreach (WIA.DeviceInfo info in manager.DeviceInfos)
{
availableDevices += info.DeviceID + "\n";
}
// show error with available devices
throw new Exception("The device with provided ID could not be found. Available Devices:\n" + availableDevices);
}
WIA.Item item = device.Items[1] as WIA.Item;
try
{
// scan image
WIA.ICommonDialog wiaCommonDialog = new WIA.CommonDialog();
WIA.ImageFile image = (WIA.ImageFile)wiaCommonDialog.ShowAcquireImage();
// save to temp file
string fileName = Path.GetTempFileName();
File.Delete(fileName);
image.SaveFile(fileName);
image = null;
// add file to output list
images.Add(Image.FromFile(fileName));
}
catch (Exception ex)
{
throw new InvalidOperationException(ex.Message);
}
finally
{
item = null;
// determine if there are any more pages waiting
WIA.Property documentHandlingSelect = null;
WIA.Property documentHandlingStatus = null;
foreach (WIA.Property prop in device.Properties)
{
if (prop.PropertyID == WIA_PROPERTIES.WIADPSDOCUMENTHANDLINGSELECT)
{
documentHandlingSelect = prop;
}
if (prop.PropertyID == WIA_PROPERTIES.WIADPSDOCUMENTHANDLINGSTATUS)
{
documentHandlingStatus = prop;
}
}
// assume there are no more pages
hasMorePages = false;
// may not exist on flatbed scanner but required for feeder
if (documentHandlingSelect != null)
{
// check for document feeder
if ((Convert.ToUInt32(documentHandlingSelect.get_Value()) &
WIA_DPS_DOCUMENT_HANDLING_SELECT.FEEDER) != 0)
{
hasMorePages = (Convert.ToUInt32(documentHandlingStatus.get_Value()) &
WIA_DPS_DOCUMENT_HANDLING_STATUS.FEEDREADY) != 0;
}
}
}
}
return(images);
}
