Hi,
I am returning an IronRuby object to C#. It is returned as a RubyClass
object. I can debug and see that it also has greet() method attached to
it but I am having difficulty in calling the greet() method from C#.
Here is the code.
var scriptingRuntime = IronRuby.Ruby.CreateRuntime();
var engine = scriptingRuntime.GetEngine(“rb”);
RubyObject rubyPerson = ((RubyObject)engine.Execute(@"
class Person
def greet()
puts 'hello world'
end
end
def getPerson()
return Person.new
end
getPerson()
"));
RubyClass rubyPersonClass = rubyPerson.ImmediateClass;
var operations = engine.CreateOperations();
operations.InvokeMember(rubyPerson, “greet”);
Met vriendelijke groeten - Best regards - Salutations
Ivan Porto C.
Blog: http://flanders.co.nz
Twitter: http://twitter.com/casualjim
Author of IronRuby in Action (http://manning.com/carrero)
This should work:
var engine = IronRuby.Ruby.CreateEngine();
engine.Execute(@"
class Person
def greet()
puts ‘hello world’
end
end
");
object personClass = engine.Runtime.Globals.GetVariable(“Person”);
object person = engine.ObjectOperations.CreateInstance(personClass);
engine.ObjectOperations.InvokeMember(person, “greet”);
Tomas
Thanks Tom!
I wonder why dynamic type variable in C# 4.0 is not able to translate
the RubyClass and trigger the greet() method.
If this is C# 4 (as you’ve suggested in another email), you should be
able to say
object personClass = engine.Runtime.Globals.GetVariable(“Person”);
dynamic person = engine.ObjectOperations.CreateInstance(personClass);
person.greet();
Is there any special way for calling the ExecuteFile method:
engine.ExecuteFile(“hello.rb”,engine.CreateScope());
And here is the hello.rb file:
class Person
def greet()
puts ‘hello world’
end
end
def getPerson()
return Person.new
end
getPerson()
Yes, sorry, you’re right – it’s Engine.Operations (but the name of the
class is “ObjectOperations”).
The error message tells you exactly what you need to do! Make sure
you’ve added references to Microsoft.CSharp.dll and System.Core.dll to
your project.
Curt H. wrote:
Yes, sorry, you’re right – it’s Engine.Operations (but the name of the
class is “ObjectOperations”).
The error message tells you exactly what you need to do! Make sure
you’ve added references to Microsoft.CSharp.dll and System.Core.dll to
your project.
The error is now gone! but I got the new error which says:
RubyObject does not contain the definition for greet!
object personClass = engine.Runtime.Globals.GetVariable(“Person”);
dynamic person =
engine.Operations.CreateInstance(personClass);
person.greet();
Odd. It works for me. Here’s my complete code:
namespace ConsoleApplication2 {
class Program {
static void Main(string[] args) {
var engine = IronRuby.Ruby.CreateEngine();
engine.Execute(@"
class Person
def greet()
puts ‘hello world’
end
end
");
object personClass =
engine.Runtime.Globals.GetVariable(“Person”);
dynamic person =
engine.Operations.CreateInstance(personClass);
person.greet();
System.Console.ReadLine();
}
}
}
Curt H. wrote:
If this is C# 4 (as you’ve suggested in another email), you should be
able to say
object personClass = engine.Runtime.Globals.GetVariable(“Person”);
dynamic person = engine.ObjectOperations.CreateInstance(personClass);
person.greet();
I tried and it did not work out.
First engine does not have ObjectOperations. There is engine.Operations
which I used but I get the error when doing person.greet().
Error 5 Missing compiler required member
‘Microsoft.CSharp.RuntimeBinder.CSharpBinaryOperationBinder…ctor’
ConsoleApplication1
Error 73 One or more types required to compile a dynamic expression
cannot be found. Are you missing references to Microsoft.CSharp.dll and
System.Core.dll? C:\Documents and Settings\AzamSharp\My
Documents\Visual Studio
10\Projects\testvs2010\ConsoleApplication1\Program.cs 80 13
ConsoleApplication1
This is very strange! I copy pasted your code and it is giving me
compile time errors:
Here is the code:
var rubyPerson = (engine.Execute(@"
require 'open-uri'
class Person
def greet()
puts 'hello world'
end
end
Person.new()
"));
object personClass =
engine.Runtime.Globals.GetVariable(“Person”);
dynamic person =
engine.Operations.CreateInstance(personClass);
person.greet();
And here is the error:
Error 1 Missing compiler required member
‘Microsoft.CSharp.RuntimeBinder.CSharpBinaryOperationBinder…ctor’
ConsoleApplication1
Error 61 One or more types required to compile a dynamic expression
cannot be found. Are you missing references to Microsoft.CSharp.dll and
System.Core.dll? C:\Documents and Settings\AzamSharp\My
Documents\Visual Studio
10\Projects\testvs2010\ConsoleApplication1\Program.cs 56 12
ConsoleApplication1
I have already added references to both the dll libraries.
Are you sure you have the appropriate version of IronRuby?
There is a special build just for .NET 4.0.
I was getting an error like the one you are until I used the .NET 4.0
build here:
http://ironruby.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=27606
Mohammad A. wrote:
This is very strange! I copy pasted your code and it is giving me
compile time errors:
Error 1 Missing compiler required member
‘Microsoft.CSharp.RuntimeBinder.CSharpBinaryOperationBinder…ctor’
ConsoleApplication1
Error 61 One or more types required to compile a dynamic expression
cannot be found. Are you missing references to Microsoft.CSharp.dll and
System.Core.dll? C:\Documents and Settings\AzamSharp\My
Documents\Visual Studio
10\Projects\testvs2010\ConsoleApplication1\Program.cs 56 12
ConsoleApplication1
I have already added references to both the dll libraries.
Yup! that did the trick! Thanks a million 