# Invoke member and dynamic binding isn't the same? **URL:** \ **Category:** IronRuby\ **Created:** [November 25, 2009, 2:43pm UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459 "2009-11-25T14:43:01Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\ **Post date:** [November 25, 2009, 2:43pm UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459/1 "2009-11-25T14:43:01Z")
Hi I have some ruby code, which through a process of instance\_eval and other meta programming tricks builds an object with a method assign defined on it. I have this code in C# _var scope = Engine.CreateScope();_ _scope.SetVariable(“ctxt”, this);_ _Engine.ExecuteFile(“rubyfile.rb”, scope);_ This code correctly sets a something property on this (linked with ctxt) but when I then want to call a method on it that should exist _public dynamic Something { get; set; }_ _Something.assign(“ivan”)_ Unhandled Exception: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: ‘Iro nRuby.Builtins.RubyObject’ does not contain a definition for ‘assign’ at CallSite.Target(Closure , CallSite , Object , String ) at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid2[T0,T1](CallSite site, T0 arg0, T1 arg1) at BugTracker\_40.Bug.Assign(String assignee) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Bug.cs:line 60 at BugTracker\_40.Program.Main(String[] args) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Program.cs:line 13 However the same code with: var \_rubyOperations = Engine.CreateOperations() public object Something { get; set; } \_rubyOperations.InvokeMember(Something, “assign”, “ivan”) does work. ## The question is why? Is this the expected behavior? Am I missing an assembly reference (it has Ironruby.\*, Microsoft.Scripting, Microsoft.Scripting.Core) Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) ---
**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\ **Post date:** [November 25, 2009, 6:27pm UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459/2 "2009-11-25T18:27:12Z")
Can you send the entire source code that sets “Something” and then the entire C# method that accesses it, ideally a minimal repro? Tomas From: removed\_email\_address@domain.invalid [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Ivan Porto Carrero Sent: Wednesday, November 25, 2009 5:29 AM To: ironruby-core Subject: [Ironruby-core] invoke member and dynamic binding isn’t the same? Hi I have some ruby code, which through a process of instance\_eval and other meta programming tricks builds an object with a method assign defined on it. I have this code in C# var scope = Engine.CreateScope(); scope.SetVariable(“ctxt”, this); Engine.ExecuteFile(“rubyfile.rb”, scope); This code correctly sets a something property on this (linked with ctxt) but when I then want to call a method on it that should exist public dynamic Something { get; set; } Something.assign(“ivan”) Unhandled Exception: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: ‘Iro nRuby.Builtins.RubyObject’ does not contain a definition for ‘assign’ at CallSite.Target(Closure , CallSite , Object , String ) at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid2[T0,T1](CallSite site, T0 arg0, T1 arg1) at BugTracker\_40.Bug.Assign(String assignee) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Bug.cs:line 60 at BugTracker\_40.Program.Main(String[] args) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Program.cs:line 13 However the same code with: var \_rubyOperations = Engine.CreateOperations() public object Something { get; set; } \_rubyOperations.InvokeMember(Something, “assign”, “ivan”) does work. ## The question is why? Is this the expected behavior? Am I missing an assembly reference (it has Ironruby.\*, Microsoft.Scripting, Microsoft.Scripting.Core) Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) ---
**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\ **Post date:** [November 30, 2009, 10:08am UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459/3 "2009-11-30T10:08:51Z")
I’ve included a C# project with all the files you need as attachment. ## [http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3213](http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3213) Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) On Wed, Nov 25, 2009 at 6:16 PM, Tomas M. \< ---
**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\ **Post date:** [December 1, 2009, 11:07am UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459/4 "2009-12-01T11:07:52Z")
d’oh Indeed after using the correct libraries things do work, imagine that… Thanks. * * * Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) On Mon, Nov 30, 2009 at 8:20 PM, Tomas M. \< ---
**Author:** ![barby](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/c57346/32.png) [@barby](https://www.ruby-forum.com/u/barby)\ **Post date:** [November 30, 2009, 8:21pm UTC](https://www.ruby-forum.com/t/invoke-member-and-dynamic-binding-isnt-the-same/179459/5 "2009-11-30T20:21:08Z")
It seems that you reference IronRuby binaries built against CLR 2.0. You need to use CLR4 binaries: [http://ironruby.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=33305](http://ironruby.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=33305) Tomas From: removed\_email\_address@domain.invalid [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Ivan Porto Carrero Sent: Monday, November 30, 2009 1:08 AM To: removed\_email\_address@domain.invalid Subject: Re: [Ironruby-core] invoke member and dynamic binding isn’t the same? I’ve included a C# project with all the files you need as attachment. ## [http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3213](http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3213) Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) On Wed, Nov 25, 2009 at 6:16 PM, Tomas M. \ wrote: Can you send the entire source code that sets “Something” and then the entire C# method that accesses it, ideally a minimal repro? Tomas From: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)] On Behalf Of Ivan Porto C. Sent: Wednesday, November 25, 2009 5:29 AM To: ironruby-core Subject: [Ironruby-core] invoke member and dynamic binding isn’t the same? Hi I have some ruby code, which through a process of instance\_eval and other meta programming tricks builds an object with a method assign defined on it. I have this code in C# var scope = Engine.CreateScope(); scope.SetVariable(“ctxt”, this); Engine.ExecuteFile(“rubyfile.rb”, scope); This code correctly sets a something property on this (linked with ctxt) but when I then want to call a method on it that should exist public dynamic Something { get; set; } Something.assign(“ivan”) Unhandled Exception: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: ‘Iro nRuby.Builtins.RubyObject’ does not contain a definition for ‘assign’ at CallSite.Target(Closure , CallSite , Object , String ) at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid2[T0,T1](CallSite site, T0 arg0, T1 arg1) at BugTracker\_40.Bug.Assign(String assignee) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Bug.cs:line 60 at BugTracker\_40.Program.Main(String[] args) in C:\dev\ironruby-in-action\Sam ples\BugTracker\_40\BugTracker\_40\Program.cs:line 13 However the same code with: var \_rubyOperations = Engine.CreateOperations() public object Something { get; set; } \_rubyOperations.InvokeMember(Something, “assign”, “ivan”) does work. ## The question is why? Is this the expected behavior? Am I missing an assembly reference (it has Ironruby.\*, Microsoft.Scripting, Microsoft.Scripting.Core) Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Blog: [http://flanders.co.nz](http://flanders.co.nz) Google Wave: removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) Twitter: [http://twitter.com/casualjim](http://twitter.com/casualjim) Author of IronRuby in Action ([http://manning.com/carrero](http://manning.com/carrero)) * * * Ironruby-core mailing list removed\_email\_address@domain.invalid[mailto:removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) [http://rubyforge.org/mailman/listinfo/ironruby-core](http://rubyforge.org/mailman/listinfo/ironruby-core)