private WiaItem GetItem(WiaDevice device)
{
if (ScanProfile.UseNativeUI)
{
var hwnd = Invoker.Current.InvokeGet(() => DialogParent.Handle);
bool useWorker = Environment.Is64BitProcess && device.Version == WiaVersion.Wia10;
if (useWorker)
{
WiaConfiguration config;
using (var worker = workerServiceFactory.Create())
{
config = worker.Service.Wia10NativeUI(device.Id(), hwnd);
}
var item = device.FindSubItem(config.ItemName);
device.Properties.DeserializeEditable(device.Properties.Delta(config.DeviceProps));
item.Properties.DeserializeEditable(item.Properties.Delta(config.ItemProps));
return(item);
}
else
{
return(device.PromptToConfigure(hwnd));
}
}
else if (device.Version == WiaVersion.Wia10)
{
// In WIA 1.0, the root device only has a single child, "Scan"
// https://docs.microsoft.com/en-us/windows-hardware/drivers/image/wia-scanner-tree
return(device.GetSubItems().First());
}
else
{
// In WIA 2.0, the root device may have multiple children, i.e. "Flatbed" and "Feeder"
// https://docs.microsoft.com/en-us/windows-hardware/drivers/image/non-duplex-capable-document-feeder
// The "Feeder" child may also have a pair of children (for front/back sides with duplex)
// https://docs.microsoft.com/en-us/windows-hardware/drivers/image/simple-duplex-capable-document-feeder
var items = device.GetSubItems();
var preferredItemName = ScanProfile.PaperSource == ScanSource.Glass ? "Flatbed" : "Feeder";
return(items.FirstOrDefault(x => x.Name() == preferredItemName) ?? items.First());
}
}
