public virtual PortableDeviceFolder GetContents(int?depth, bool folderOnly)
{
var root = new PortableDeviceFolder("DEVICE", FriendlyName);
var queue = new Queue <PortableDeviceObject>();
device.Content(out IPortableDeviceContent content);
content.Properties(out IPortableDeviceProperties properties);
try
{
EnumerateContents(ref content, ref properties, root, queue, depth, folderOnly);
while (queue.Count > 0)
{
var currentItem = queue.Dequeue();
if (currentItem is PortableDeviceFolder nextFolder)
{
EnumerateContents(ref content, ref properties, nextFolder, queue, --depth, folderOnly);
}
}
return(root);
}
finally
{
Marshal.ReleaseComObject(content);
Marshal.ReleaseComObject(properties);
}
}
private void EnumerateContents(ref IPortableDeviceContent content, ref IPortableDeviceProperties properties, PortableDeviceFolder parent, Queue <PortableDeviceObject> queue, int?depth, bool folderOnly = false)
{
content.EnumObjects(0, parent.Id, null, out IEnumPortableDeviceObjectIDs objectIDs);
try
{
uint fetched = 0;
do
{
objectIDs.Next(1, out string nextObjectIDs, ref fetched);
if (fetched > 0)
{
var item = WrapObject(properties, nextObjectIDs);
if (!folderOnly || item.IsFolder)
{
parent.Files.Add(item);
}
if (depth == null || depth > 1)
{
queue.Enqueue(item);
}
}
} while (fetched > 0);
}
finally
{
Marshal.ReleaseComObject(objectIDs);
}
}