[IronPython] TryGetMember is called for methods instead of TryInvokeMember

[Marcus Carvalho]

I have an application that passes a DynamicObject to an IronPython script.
The class works perfectly in C# but when a method is invoked inside a
IronPython script the TryGetMember is called instead of TryInvokeMember and
if I try to return a value through TryGetMember I get an exception saying
that the member is not callable.

I found a user with similar problem (
http://social.msdn.microsoft.com/Forums/en/dlr/thread/0556e593-2360-43b8-97e5-201c3c3ce1c5).
He said that dowloading the latest release solved the problem. I have
downloaded the latest source code release (70538), compiled it to .NET 4.0,
but I still having the issue.

Here is a slightly modified code I get from the post, that does not work for
me:


using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using IronPython.Hosting;

using IronPython.Runtime;

using Microsoft.Scripting;

using Microsoft.Scripting.Hosting;

using System.Dynamic;

   namespace TestDynamicInvokeFromPython

{

class Program

{

static void Main(string[] args)

{

dynamic myDynamicObject = new MyDynamicObject();

//first tey calling this object from C#, it should call Foo() and they try
to call MissingMethod();

Console.WriteLine("C# Test...");

try

{

myDynamicObject.Foo();

System.Console.WriteLine("Method Result: " +
myDynamicObject.MissingMethod());

}

catch (Exception ex)

{

Console.WriteLine("Got C# exception: " + ex.Message);

}

 ScriptEngine pythonEngine = Python.CreateEngine();

ScriptScope scriptScope = pythonEngine.CreateScope();

string pythonScript = SetPythonScript();

ScriptSource script =
pythonEngine.CreateScriptSourceFromString(pythonScript, SourceCodeKind
.Statements);

scriptScope.SetVariable("myDynamicObject", myDynamicObject);

//Now do the same thing from python, I expect to get the same behaviour as
from C# (but I don't)

Console.WriteLine("\r\nScript Test...");

try

{

script.Execute(scriptScope);

}

catch (Exception ex)

{

Console.WriteLine("Got script exception: " + ex.Message);

}

 Console.ReadKey();

}

static string SetPythonScript()

{

string s = "";

s += "import clr" + "\r\n";

s += "clr.AddReference('mscorlib')" + "\r\n";

s += "myDynamicObject.Foo();" + "\r\n";

s += "myDynamicObject.MissingMethod();" + "\r\n";

return s;

}

}

 public class MyDynamicObject : DynamicObject

{

public void Foo()

{

Console.WriteLine("Foo() Called");

}

public override DynamicMetaObject GetMetaObject(System.Linq.Expressions.
Expression parameter)

{

Console.WriteLine("GetMetaObject() Called");

return base.GetMetaObject(parameter);

}

public override bool TryInvokeMember(InvokeMemberBinder binder, object[]
args, out object result)

{

if (binder.Name == "MissingMethod")

{

result = "Method Found";

return true;

}

else

{

result = null;

return false;

}

}

public override bool TryGetMember(GetMemberBinder binder, out object result)

{

Console.WriteLine("TryGetMember() Called");

return base.TryGetMember(binder, out result);

}

//#region AllOtherOverridees

// ...

//#endregion //AllOtherOverridees

}

}

 Marcus Carvalho
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