[IronPython] [python] Re: IronPython & Silverlight

Michael Foord fuzzyman at voidspace.org.uk
Sat Jan 26 21:00:57 CET 2008


On 26 Jan 2008 14:54:56 -0500, Craig S. Perler 04 <
Craig.S.Perler.04 at alum.dartmouth.org> wrote:
>
> The DLLs I'm currently referencing and experiencing
> problems with are the ones that downloaded with
> Silverlight 1.1...



Ah - I misunderstood the discussion. I'll try compiling the code on my
system and see what happens.

Michael


---Discussion of IronPython <users at lists.ironpython.com>
> wrote ---
> Craig S. Perler 04 wrote:
> > Hi Jimmy,
> >
> > You're correct, I'm trying to host IronPython in an
> > existing C# SL app and I would like to use the .NET
> > libraries from IronPython.  I hadn't realized or
> noticed,
> > however, that the dlls shipped with SL are not the same
> as
> > those available for production use from IronPython
> > directly.  My app references IronPython.dll version
> > 2.0.0.0, runtime version 2.0.50727, file version
> > 1.1.20625.0.  Is there a more appropriate and still SL
> > compatible version to use?
> >
> >
>
> What is the reason not to use the version of IronPython
> that ships with
> Silverlight?
>
> To use any other you will have to compile from source,
> targeting
> Silverlight. This should work though - you shouldn't just
> drop in DLLs
> that weren't compiled for Silverlight.
>
> What you are aiming to do seems straightforward enough.
>
> Michael
>
> > That aside, the IronPython-relevant aspect of my app is
> > straightforward: grab a string from a textbox, pass it
> via
> > JavaScript to SL, and then attempt to execute it via
> > IronPython.
> >
> > The C# method that handles this process is below.  It
> > takes the string from JavaScript, and then executes it
> as
> > Python code.  For the sake of debugging at first at
> least,
> > it then assumes that a function "func" was defined, as
> > that's then evaluated.
> >
> >     [Scriptable]
> >     public void Execute(string script)
> >     {
> >         try
> >         {
> >             PythonEngine engine =
> > PythonEngine.CurrentEngine;
> >             engine.Execute(script);
> >             object result = engine.Evaluate("func()");
> >
> >             if (result != null)
> >             {
> >                 Debug.WriteLine(result);
> >             }
> >         }
> >         catch (Exception e)
> >         {
> >             Debug.WriteLine(e);
> >         }
> >     }
> >
> > Prior to any execution as per above, I initialize PAL
> > exactly as described here:
> >
> [http://www.voidspace.org.uk/ironpython/silverlight/embeddi
> > ng_ironpython.shtml].
> >
> > Thoughts on what I'm doing wrong?
> >
> > Thanks again,
> >
> > -Craig
> >
> > ---Discussion of IronPython <users at lists.ironpython.com>
> > wrote ---
> >
> >> Craig S. Perler wrote:
> >>
> >> I'm having problems accessing .NET libraries from
> >> IronPython hosted within a Silverlight application and
> >> have hit a wall. If you have any advice, I'd be most
> >> appreciative!
> >>
> >
> > The work around for hosting IronPython in Silverlight
> 1.1
> > is a little messy, since the DLR should take care of
> this
> > and not require the user's app to override the PAL. We
> are
> > revisiting this for the next release of Silverlight to
> > make it work well.
> >
> > I assume you'd like to host IronPython in an existing C#
> > SL app? If you can do without C# code, and without the
> > bleeding edge IronPython version ... you could just use
> > the IronPython version shipped in Silverlight. There are
> > samples on silverlight.net if you'd like examples on how
> > to do it.
> >
> >
> >> To describe my setup... I'm first initializing the
> >> PlatformAdaptationLayer with the details described here
> >>
> >>
> >
> [http://www.voidspace.org.uk/ironpython/silverlight/embeddi
> >
> >> ng_ironpython.shtml]. I'm not certain what exactly that
> >> does, but it seems clear that no amount of fiddling
> >>
> > around
> >
> >> in IronPython works without detailing the
> >> ScriptEnvironmentSetup. With that in place, I see a bit
> >>
> > of
> >
> >> progress: I can execute the script "def func():\r\n
> >> return 'in Func()'" and then retrieve the result by
> >> evaluating the script "func()".
> >>
> >> I've tried a variety of combinations to gain access to
> >> System.DateTime from the Python script, but they all end
> >> up with an error like the one below. Additionally, this
> >> error is also similar to the one I receive when
> >>
> > attempting
> >
> >> to call PythonEngine.ExecuteFile(string path), which I
> >> have thus far been unable to get to work.
> >>
> >
> > Can you send me the source or a smaller repro of the
> > issue? Michael, did you run into any of these issues?
> >
> > ~Jimmy
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-- 
http://www.manning.com/foord
http://www.voidspace.org.uk
http://www.ironpython.info
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