private static IList <int> getAvailableResolutions(WiaSettings wiaSettings)
{
var availableResolutions = new List <int>();
var horizontalResolution = wiaSettings.GetProperty("Horizontal Resolution");
switch (horizontalResolution.SubType)
{
case WiaSubType.RangeSubType:
{
var stp = 100;
var min = 100;
var max = 2000;
if (horizontalResolution.SubTypeMin <= 75)
{
availableResolutions.Add(75);
}
if (horizontalResolution.SubTypeMin > min)
{
min = horizontalResolution.SubTypeMin;
}
if (horizontalResolution.SubTypeStep > stp)
{
stp = horizontalResolution.SubTypeStep;
}
if (horizontalResolution.SubTypeMax < max)
{
max = horizontalResolution.SubTypeMax;
}
for (var i = min; i <= max; i += stp)
{
availableResolutions.Add(i);
}
break;
}
case WiaSubType.ListSubType:
{
var subTypeValues = horizontalResolution.SubTypeValues;
for (var i = 1; i <= subTypeValues.Count; i++)
{
availableResolutions.Add(Convert.ToInt32(subTypeValues.get_Item(i)));
}
break;
}
}
return(availableResolutions);
}
/// <summary>
/// Lists the connected scanners to the system.
/// </summary>
public static IList <ScannerSettings> GetScannerDevices()
{
var scanners = new List <ScannerSettings>();
var deviceInfos = new DeviceManager().DeviceInfos;
for (var i = 1; i <= deviceInfos.Count; i++) // Using a regular for loop to avoid `System.IO.FileNotFoundException: Could not load file or assembly CustomMarshalers` in .NET Core 2x apps.
{
var info = deviceInfos[i];
if (info.Type != WiaDeviceType.ScannerDeviceType)
{
continue;
}
var device = info.Connect();
var scanner = device.Items[1];
var wiaSettings = new WiaSettings(device.Properties);
var defaultSettings = new WiaSettings(scanner.Properties);
var caps = wiaSettings.GetPropertyValue <int>("Document Handling Capabilities");
scanners.Add(new ScannerSettings
{
Name = info.Properties["Description"].get_Value().ToString(),
Id = info.DeviceID,
SupportedResolutions = getAvailableResolutions(defaultSettings),
ScannerDeviceSettings = wiaSettings.ExtendedProperties,
ScannerPictureSettings = defaultSettings.ExtendedProperties,
IsAutomaticDocumentFeeder = (caps & (int)WiaDpsDocumentHandlingSelect.FEEDER) != 0,
IsDuplex = (caps & (int)WiaDpsDocumentHandlingSelect.DUPLEX) != 0,
IsFlatbed = (caps & (int)WiaDpsDocumentHandlingSelect.FLATBED) != 0,
SupportedEvents = getDeviceEvents(device.Events),
SupportedTransferFormats = getSupportedTransferFormats(scanner)
});
Marshal.ReleaseComObject(device);
Marshal.ReleaseComObject(scanner);
}
return(scanners);
}
/// <summary>
/// Scanner Picture Config. Setting properties like ColorFormat, Brightess, etc.
/// </summary>
public ScannerPictureConfig(WiaSettings wiaScannerPictureSettings, ScannerSettings scannerSettings)
{
_wiaScannerPictureSettings = wiaScannerPictureSettings;
_scannerSettings = scannerSettings;
}
