To answer my own question, here's the modified and working code for the archives:
public override System.Runtime.Remoting.Messaging.IMessage Invoke(
System.Runtime.Remoting.Messaging.IMessage message )
{
System.Runtime.Remoting.Messaging.IMethodCallMessage methodMessage =
(System.Runtime.Remoting.Messaging.IMethodCallMessage) message;
System.Reflection.MethodBase method = methodMessage.MethodBase;
object returnValue = null;
object [] tempArgs = methodMessage.Args;
System.Reflection.ParameterModifier pm =
new System.Reflection.ParameterModifier( tempArgs.Length );
IDictionary d = methodMessage.Properties;
IDictionaryEnumerator e = (IDictionaryEnumerator) d.GetEnumerator();
while (e.MoveNext())
{
Object key = e.Key;
String keyName = key.ToString();
Object value = e.Value;
if ((keyName == "__MethodSignature") && (null != value))
{
Type[] args = (Type[])value;
for(int i = 0; i < args.Length; i++)
{
if(args[i].IsByRef)
{
pm[i] = true;
}
else
{
pm[i] = false;
}
}
break;
}
}
System.Reflection.ParameterModifier[] pms =
new System.Reflection.ParameterModifier[ 1 ] { pm };
// Handle IInterposed methods/properties here. Right now, there is
// only one property, so don't do any extensive checking to determine
// the method being invoked.
if ( method.DeclaringType == typeof( IInterposed ) )
{
returnValue = m_target;
}
else
{
Type type = m_target.GetType();
returnValue = type.InvokeMember( method.Name,
System.Reflection.BindingFlags.InvokeMethod, null, m_target,
tempArgs, pms, null, null );
}
System.Runtime.Remoting.Messaging.ReturnMessage returnMessage =
new System.Runtime.Remoting.Messaging.ReturnMessage( returnValue,
tempArgs, tempArgs.Length, methodMessage.LogicalCallContext,
methodMessage );
return returnMessage;
}
--
- Petter Nilsen, [EMAIL PROTECTED]
Technical Manager, Internet Development, Visma Software ASA
-----Original Message-----
From: Petter Nilsen
Sent: Thursday, September 26, 2002 10:38 PM
To: [EMAIL PROTECTED]
Subject: Re: [ADVANCED-DOTNET] Interposer class and problems
> Of course, this by itself is not going to work as I've listed it. You must
> analyze the method being called in terms its parameters. Each parameter
> will need a corresponding ParameterModifier set properly based on whether
> the parameter is an in-, out-, or ref-type. You can then make the call (via
> InvokeMember) and copy the modified parameters back into the original
> message...
I did try that one a couple of days ago, but what I didn't do back then was to make a
copy of the methodMessage.Args array. I did a combination of these two factors now and
it worked!
> BTW, I recall an old thread in the DOTNET archives where Adam Nathan talks
> about VT_VARIANT | VT_BYREF not being supported. I say this because of the
> following function (that was sent to me out-of-band):
> HRESULT bcRACIsEnabled([out] VARIANT *pvtAuthenticationKey, [out]INT*
> piIsEnabled);
> You may find yourself having trouble with this one...
That one actually worked too, so VT_VARIANT | VT_BYREF does work with on [out]
parameters.
This has been an interesting problem and hopefully I have a solution now that will
work with all the methods in our legacy COM objects. Thanks a lot for your help!
Would be useful to update your Interposer class for COM with this code, and post it
back to gotdotnet.com?
- Petter
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