[IronPython] Loading IronPython assemblies dynamatically

[Marty Nelson]

Probably has to do with binding context.  This means that assemblies
loaded via LoadFile, LoadFrom and Load don't necessarily "see"
assemblies loaded in other contexts.  See
http://blogs.msdn.com/suzcook/archive/2003/05/29/57143.aspx for more
info.

You also might try just changing to LoadFrom, LoadFile doesn't use
Fusion at all (see
http://blogs.msdn.com/suzcook/archive/2003/09/19/loadfile-vs-loadfrom.as
px).  

We actually include the following code on AssemblyResolve to bridge
contexts:

  foreach (Assembly loadedAssembly in
AppDomain.CurrentDomain.GetAssemblies())
            {
                if (loadedAssembly.FullName == assemblyFullName)
                {
                    return loadedAssembly;
                }
            }


-----Original Message-----
From: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] On Behalf Of Ben Hall
Sent: Friday, May 16, 2008 5:28 PM
To: Discussion of IronPython
Subject: [IronPython] Loading IronPython assemblies dynamatically

Hello,

I have an interesting problem and I was wondering if you would be able
to help. I am trying to load the IronPython assemblies dynamically
(IronPython.dll and IronPython.Modules.dll),  and what I am doing is
this:

Assembly.LoadFile(Path.Combine(Settings.BinDirectory, assembly));

I'm then creating the Runtime and the Engine after the assemblies have
loaded.  But when I try runtime.GetEngine I get the following
exception:

  ----> System.IO.FileNotFoundException : Could not load file or
assembly 'IronPython, Version=2.0.0.2000, Culture=neutral,
PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The
system cannot find the file specified.
	at
Microsoft.Scripting.Runtime.ScriptDomainManager.LanguageRegistration.Loa
dLanguageContext(ScriptDomainManager
manager)
	at
Microsoft.Scripting.Runtime.ScriptDomainManager.GetLanguageContext(Type
type)
	at Microsoft.Scripting.Hosting.ScriptRuntime.GetEngine(Type
languageContextType)

Ok, so I hooked up to the Assembly Resolve event, and when I get to
get the engine it fires off.

Assembly name passed into the AssemblyResolve event is:
IronPython, Version=2.0.0.2000, Culture=neutral,
PublicKeyToken=31bf3856ad364e35

However, the assembly I am loading is this:
IronPython, Version=2.0.0.2000, Culture=neutral,
PublicKeyToken=31bf3856ad364e35

Same with Modules:
IronPython.Modules, Version=2.0.0.2000, Culture=neutral,
PublicKeyToken=31bf3856ad364e35

After I reload the assembly (using the same Assembly.Load) everything
works fine!

Why is this? I would prefer not to have to load my assemblies twice.
These the assemblies I downloaded from CodePlex.
Thanks

Ben
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