public void SearchComplete(int lFindData)
{
IUPnPDeviceFinderCallback callback = (IUPnPDeviceFinderCallback)connection.Target;
if (callback == null)
{
return;
}
callback.SearchComplete(lFindData);
}
public void DeviceRemoved(int lFindData, string bstrUDN)
{
IUPnPDeviceFinderCallback callback = (IUPnPDeviceFinderCallback)connection.Target;
if (callback == null)
{
return;
}
callback.DeviceRemoved(lFindData, bstrUDN);
}
public void DeviceAdded(int lFindData, UPnPDevice pDevice)
{
try
{
IUPnPDeviceFinderCallback callback = (IUPnPDeviceFinderCallback)connection.Target;
if (callback == null)
{
return;
}
callback.DeviceAdded(lFindData, pDevice);
}
finally
{
Marshal.ReleaseComObject(pDevice);
}
}
// Initiate UPNP discovery
void SearchForDevices()
{
IntPtr pCB;
// Create an instance of a UPNPFinder
Type tFinder = Type.GetTypeFromCLSID(CLSID_UPnPFinder);
object oInst = Activator.CreateInstance(tFinder);
_finder = (IUPnPDeviceFinder)oInst;
// Create a callback object
_finderCallback = new Callback(this);
pCB = Marshal.GetComInterfaceForObject(_finderCallback, typeof(IUPnPDeviceFinderCallback));
// Pin the callback to ensure it does not get garbage-collected
_hCallback = GCHandle.Alloc(_finderCallback, GCHandleType.Pinned);
// Start search
_asyncFind = _finder.CreateAsyncFind("upnp:rootdevice", 0, pCB);
Debug.WriteLine("Starting search");
_finder.StartAsyncFind(_asyncFind);
}
public DeviceFinderCallback(IUPnPDeviceFinderCallback outer)
{
connection = new WeakReference(outer);
}
