private object QueryInterface(string name)
{
Guid iid = Guid.Empty;
object o = null;
if (!Guid.TryParse(name, out iid))
{
foreach (COMInterfaceEntry ent in GetInterfaces())
{
if (String.Equals(ent.Name, name, StringComparison.OrdinalIgnoreCase))
{
iid = ent.Iid;
break;
}
}
}
Type type = COMUtilities.GetInterfaceType(iid);
if (type != null)
{
o = new DynamicComObjectWrapper(_registry, type, _target);
}
return(o);
}
public static object Unwrap(object o)
{
DynamicComObjectWrapper wrapper = o as DynamicComObjectWrapper;
if (wrapper != null)
{
return(wrapper._target);
}
else
{
return(o);
}
}
private static object[] UnwrapArray(object[] args, int outSize)
{
if (args != null)
{
object[] ret = new object[args.Length + outSize];
for (int i = 0; i < args.Length; ++i)
{
// Convert lists to object arrays (should do more here?)
if (args[i] is IList)
{
ret[i] = ((IList)args[i]).Cast <object>().ToArray();
}
ret[i] = DynamicComObjectWrapper.Unwrap(args[i]);
}
return(ret);
}
return(args);
}
public override bool TryInvoke(InvokeBinder binder, object[] args, out object result)
{
List <Type> outReturnTypes = new List <Type>();
List <object> returns = new List <object>();
int startIndex = 0;
ParameterInfo[] pis = _mi.GetParameters();
for (startIndex = pis.Length; startIndex > 0; --startIndex)
{
ParameterInfo pi = pis[startIndex - 1];
if ((pi.Attributes & ParameterAttributes.Out) == ParameterAttributes.Out)
{
outReturnTypes.Insert(0, pi.ParameterType);
}
else
{
break;
}
}
object[] uargs = UnwrapArray(args, outReturnTypes.Count);
// Possible varargs
if ((outReturnTypes.Count == 0) && (pis.Length > 0) && (uargs.Length >= pis.Length) && (pis[pis.Length - 1].ParameterType == typeof(object[])))
{
// Copy up to last argument (pis.Length - 1)
object[] xargs = new object[pis.Length];
Array.Copy(uargs, xargs, pis.Length - 1);
// Copy remaining parameters into a trailing array
object[] targs = new object[uargs.Length - pis.Length + 1];
Array.Copy(uargs, pis.Length - 1, targs, 0, targs.Length);
xargs[pis.Length - 1] = targs;
uargs = xargs;
}
object ret = _mi.Invoke(_target, uargs);
if (_mi.ReturnType != typeof(void))
{
returns.Add(DynamicComObjectWrapper.Wrap(_registry, ret, _mi.ReturnType));
}
// Promote out parameters
if (outReturnTypes.Count > 0)
{
for (int i = 0; i < outReturnTypes.Count; ++i)
{
returns.Add(DynamicComObjectWrapper.Wrap(_registry, uargs[startIndex + i], outReturnTypes[i]));
}
}
if (returns.Count == 0)
{
ret = null;
}
else if (returns.Count == 1)
{
ret = returns[0];
}
else
{
ret = Activator.CreateInstance(typeof(Tuple <>).MakeGenericType(returns.Select(o => o != null ? o.GetType() : typeof(object)).ToArray()), returns.ToArray());
}
result = ret;
return(true);
}
