public static object GetTypedObjectForIUnknown(IntPtr pUnk, Type t)
{
ComInteropProxy proxy = new ComInteropProxy(pUnk, t);
__ComObject co = (__ComObject)proxy.GetTransparentProxy();
foreach (Type itf in t.GetInterfaces())
{
if ((itf.Attributes & TypeAttributes.Import) == TypeAttributes.Import)
{
if (co.GetInterface(itf) == IntPtr.Zero)
{
return(null);
}
}
}
return(co);
}
public bool CanCastTo(Type fromType, object o)
{
__ComObject co = o as __ComObject;
if (co == null)
{
throw new NotSupportedException("Only RCWs are currently supported");
}
if ((fromType.Attributes & TypeAttributes.Import) == 0)
{
return(false);
}
if (co.GetInterface(fromType, false) == IntPtr.Zero)
{
return(false);
}
return(true);
}
public static object CreateWrapperOfType(object o, Type t)
{
__ComObject co = o as __ComObject;
if (co == null)
{
throw new ArgumentException("o must derive from __ComObject", "o");
}
if (t == null)
{
throw new ArgumentNullException("t");
}
Type[] itfs = o.GetType().GetInterfaces();
foreach (Type itf in itfs)
{
if (itf.IsImport && co.GetInterface(itf) == IntPtr.Zero)
{
throw new InvalidCastException();
}
}
return(ComInteropProxy.GetProxy(co.IUnknown, t).GetTransparentProxy());
}
public bool CanCastTo(Type fromType, object o)
{
__ComObject _ComObject = o as __ComObject;
if (_ComObject == null)
{
throw new NotSupportedException("Only RCWs are currently supported");
}
return((fromType.Attributes & TypeAttributes.Import) != TypeAttributes.NotPublic && !(_ComObject.GetInterface(fromType, false) == IntPtr.Zero));
}