public IEnumerable <WiaDeviceInfo> GetDeviceInfos()
{
List <WiaDeviceInfo> result = new List <WiaDeviceInfo>();
WiaException.Check(Version == WiaVersion.Wia10
? NativeWiaMethods.EnumerateDevices1(Handle, x => result.Add(new WiaDeviceInfo(Version, x)))
: NativeWiaMethods.EnumerateDevices2(Handle, x => result.Add(new WiaDeviceInfo(Version, x))));
return(result);
}
public List <WiaItem> GetSubItems()
{
var items = new List <WiaItem>();
WiaException.Check(Version == WiaVersion.Wia10
? NativeWiaMethods.EnumerateItems1(Handle, itemHandle => items.Add(new WiaItem(Version, itemHandle)))
: NativeWiaMethods.EnumerateItems2(Handle, itemHandle => items.Add(new WiaItem(Version, itemHandle))));
return(items);
}
public WiaDevice?PromptForDevice(IntPtr parentWindowHandle)
{
var hr = Version == WiaVersion.Wia10
? NativeWiaMethods.SelectDevice1(Handle, parentWindowHandle, SCANNER_DEVICE_TYPE, SELECT_DEVICE_NODEFAULT, out _, out var deviceHandle)
: NativeWiaMethods.SelectDevice2(Handle, parentWindowHandle, SCANNER_DEVICE_TYPE, SELECT_DEVICE_NODEFAULT, out _, out deviceHandle);
if (hr == 1)
{
return(null);
}
WiaException.Check(hr);
return(new WiaDevice(Version, deviceHandle));;
}
public bool Download()
{
var hr = Version == WiaVersion.Wia10
? NativeWiaMethods.Download1(Handle, TransferStatusCallback)
: NativeWiaMethods.Download2(Handle, TransferStatusCallback);
if (hr == 1)
{
// User cancelled
return(false);
}
WiaException.Check(hr);
return(true);
}
public string[]? PromptForImage(IntPtr parentWindowHandle, WiaDevice device, string?tempFolder = null)
{
tempFolder ??= Path.GetTempPath();
var fileName = Path.GetRandomFileName();
IntPtr itemHandle = IntPtr.Zero;
int fileCount = 0;
string[] filePaths = new string[0];
var hr = Version == WiaVersion.Wia10
? NativeWiaMethods.GetImage1(Handle, parentWindowHandle, SCANNER_DEVICE_TYPE, 0, 0, Path.Combine(tempFolder, fileName), IntPtr.Zero)
: NativeWiaMethods.GetImage2(Handle, 0, device.Id(), parentWindowHandle, tempFolder, fileName, ref fileCount, ref filePaths, ref itemHandle);
if (hr == 1)
{
return(null);
}
WiaException.Check(hr);
return(filePaths ?? new[] { Path.Combine(tempFolder, fileName) });
}
public WiaItem?PromptToConfigure(IntPtr parentWindowHandle)
{
if (Version == WiaVersion.Wia20)
{
throw new InvalidOperationException("WIA 2.0 does not support PromptToConfigure. Use WiaDeviceManager.PromptForImage if you want to use the native WIA 2.0 UI.");
}
int itemCount = 0;
IntPtr[]? items = null;
var hr = NativeWiaMethods.ConfigureDevice1(Handle, parentWindowHandle, 0, 0, ref itemCount, ref items);
if (hr == 1)
{
return(null);
}
WiaException.Check(hr);
if (items == null)
{
return(null);
}
return(new WiaItem(Version, items[0]));
}
protected internal WiaPropertyCollection(WiaVersion version, IntPtr propertyStorageHandle) : base(version, propertyStorageHandle)
{
_propertyDict = new Dictionary <int, WiaProperty>();
WiaException.Check(NativeWiaMethods.EnumerateProperties(Handle,
(id, name, type) => _propertyDict.Add(id, new WiaProperty(Handle, id, name, type))));
}
