void Dispose(bool disposing)
{
if (disposed)
{
return;
}
disposed = true;
init = false;
if (disposing)
{
previewHandler.Unload();
comSite.Dispose();
site = null;
Marshal.ReleaseComObject(previewHandler);
}
else
{
// We're in the finalizer.
// Field previewHandler might have been finalized at this point.
// Get a new RCW.
var phObject = Marshal.GetUniqueObjectForIUnknown(pPreviewHandler);
var ph = phObject as IPreviewHandler;
if (ph != null)
{
ph.Unload();
}
Marshal.ReleaseComObject(phObject);
}
Marshal.Release(pPreviewHandler);
}
public PreviewHandler(Guid clsid, IPreviewHandlerManagedFrame frame)
{
disposed = true;
init = false;
shown = false;
comSite = new PreviewHandlerFrame(frame);
site = frame;
try
{
SetupHandler(clsid);
disposed = false;
}
catch
{
if (previewHandler != null)
{
Marshal.ReleaseComObject(previewHandler);
}
previewHandler = null;
if (pPreviewHandler != IntPtr.Zero)
{
Marshal.Release(pPreviewHandler);
}
pPreviewHandler = IntPtr.Zero;
comSite.Dispose();
comSite = null;
site = null;
throw;
}
}
public PreviewHandlerFrame(IPreviewHandlerManagedFrame frame)
{
disposed = true;
if (frame == null)
{
throw new ArgumentNullException("frame");
}
disposed = false;
site = frame;
}
public void Dispose()
{
disposed = true;
site = null;
}
