WIA でのスキャンに問題があります。
public List<Image> Scan(string scannerId)
{
var images = new List<Image>();
var hasMorePages = true;
while (hasMorePages)
{
// select the correct scanner using the provided scannerId parameter
var manager = new DeviceManager();
Device device = null;
foreach (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 = "";
foreach (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);
}
Item item = device.Items[1];
try
{
// scan image
ICommonDialog wiaCommonDialog = new CommonDialog();
var image = (ImageFile) wiaCommonDialog.ShowTransfer(item, WiaFormatBmp, true); // <--- exception goes from there
// save to temp file
string fileName = "test.bmp";//Path.GetTempFileName();
File.Delete(fileName);
image.SaveFile(fileName);
image = null;
// add file to output list
images.Add(Image.FromFile(fileName));
}
catch (Exception exc)
{
throw exc;
}
finally
{
item = null;
//determine if there are any more pages waiting
Property documentHandlingSelect = null;
Property documentHandlingStatus = null;
foreach (Property prop in device.Properties)
{
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT)
documentHandlingSelect = prop;
if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_STATUS)
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.FEED_READY) != 0);
}
}
}
}
return images;
}
スキャンが完了すると、「動的操作は同種の AppDomain でのみ実行できます。」という例外が発生します。誰かが私が間違っていることを説明できますか? 別のスレッドで使用しようとしましたが、それでも同じ例外が発生します。
スキャナ: DSmobile 700D。