[Ironpython-users] Problem with embedding IronPython into Silverlight Application

Slide slide.o.mix at gmail.com
Wed Apr 18 22:48:17 CEST 2012


This really sounds like the assemblies you are referencing are not really
the SL assemblies, can you open the assembly in ILSpy and decompile
GetPrefix and see what you have?

slide

On Wed, Apr 18, 2012 at 1:44 PM, Mattias Ahlenius
<mattias at goodsolutions.se>wrote:

> Same exception even if I use the 2.7.2.1 bins: (I support you mean 2.7..
> and not 2.5..)
>
> Message: Failed to load language 'IronPython 2.7.2.1': The type
> initializer for 'IronPython.Modules.SysModule' threw an exception.
>
> InnerException:
>
> "Attempt by security transparent method
> 'IronPython.Modules.SysModule.GetPrefix()' to access security critical
> method 'System.Reflection.Assembly.get_Location()' failed."
>
> /Mattias
>
> 2012/4/18 Slide <slide.o.mix at gmail.com>
>
>> Please make sure you have 2.5.2.1 and not just 2.5.2.
>>
>> On Wed, Apr 18, 2012 at 12:16 PM, Mattias Ahlenius
>> <mattias at goodsolutions.se> wrote:
>> > Thanks for your quick reply Keith,
>> >
>> > Tried you code and I still get the same Exception:
>> >
>> > "Attempt by security transparent method
>> > 'IronPython.Modules.SysModule.GetPrefix()' to access security critical
>> > method 'System.Reflection.Assembly.get_Location()' failed."
>> >
>> > /Mattias
>> >
>> >
>> >
>> > 2012/4/18 Keith Rome <rome at wintellect.com>
>> >>
>> >> Does this not work for you?
>> >>
>> >>
>> >>
>> >> using IronPython.Hosting;
>> >>
>> >> // ...
>> >>
>> >> _python = Python.CreateEngine();
>> >>
>> >>
>> >>
>> >> I believe that should handle the simple/typical scenarios, unless you
>> need
>> >> to alter the environment (such as plugging in a custom Host/PAL).
>> >>
>> >>
>> >>
>> >> If you need to customize the environment, then this should work:
>> >>
>> >>
>> >>
>> >> var options = new Dictionary<string, object>();
>> >>
>> >> ScriptRuntimeSetup setup = Python.CreateRuntimeSetup(options);
>> >>
>> >> _runtime = new ScriptRuntime(setup);
>> >>
>> >> _python = Python.GetEngine(_runtime);
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> This code should work exactly the same on desktop CLR and Silverlight.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> Keith Rome
>> >>
>> >> Senior Consultant and Architect
>> >>
>> >> MCPD-EAD, MCSD, MCDBA, MCTS-WPF, MCTS-TFS, MCTS-WSS
>> >>
>> >> Wintellect | 770.617.4016 | krome at wintellect.com
>> >>
>> >> www.wintellect.com
>> >>
>> >>
>> >>
>> >> From: ironpython-users-bounces+rome=wintellect.com at python.org
>> >> [mailto:ironpython-users-bounces+rome=wintellect.com at python.org] On
>> Behalf
>> >> Of Mattias Ahlenius
>> >> Sent: Wednesday, April 18, 2012 2:41 PM
>> >> To: ironpython-users at python.org
>> >> Subject: [Ironpython-users] Problem with embedding IronPython into
>> >> Silverlight Application
>> >>
>> >>
>> >>
>> >> Hi,
>> >>
>> >>
>> >>
>> >> I'm new to scripting and would like to add support for IronPython to
>> our
>> >> Silverlight application, I have tried to find an answer on the net but
>> could
>> >> not find anyone else facing the same problem. The app is an out of
>> browser
>> >> application.
>> >>
>> >>
>> >>
>> >> I've added the latest release (2.7.2) from nuget, checked that the
>> >> binaries being used is from the SL5
>> libs-catalog: IronPython.2.7.2\lib\Sl5
>> >>
>> >>
>> >>
>> >> The code I use to create the scripting engine is the following:
>> >>
>> >>
>> >>
>> >> ..
>> >>
>> >>
>> >>
>>             _runtime = new ScriptRuntime(DynamicEngine.CreateRuntimeSetup(true));
>> >>
>> >>             _python = _runtime.GetEngine("py");
>> >>
>> >> ..
>> >>
>> >>
>> >>
>> >> When GetEngine is executed I'll the following secutiry exception:
>> >>
>> >> "{System.MethodAccessException: Attempt by security transparent method
>> >> 'IronPython.Modules.SysModule.GetPrefix()' to access security critical
>> >> method 'System.Reflection.Assembly.get_Location()' failed.
>> >>
>> >>    at IronPython.Modules.SysModule.GetPrefix()
>> >>
>> >>    at IronPython.Modules.SysModule..cctor()}"
>> >>
>> >> When checking the code at GitHub for the method: GetPrefix()
>> >>
>> >>
>> >>
>> >> There are code checking a compiler-constant that seems to be if you
>> >> running in "silverlight" (don't have diskaccess to the libs), but the
>> code
>> >> seems to be executed anyway, which makes me wonder if I still doesn't
>> use
>> >> the correct libs for Silverlight.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> Would really appreciate if someone could point me in the right
>> direction.
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> Have a nice day!
>> >>
>> >> --
>> >>
>> >> Best regards,
>> >>
>> >>
>> >>
>> >> Mattias Ahlenius
>> >>
>> >> 031 - 788 19 25
>> >>
>> >>
>> >>
>> >> Good Solutions AB
>> >>
>> >> http://www.goodsolutions.se
>> >>
>> >>
>> >
>> >
>> >
>> >
>> > --
>> >
>> > Med vänlig hälsning,
>> >
>> > Mattias Ahlenius
>> > 031 - 788 19 25
>> >
>> > Good Solutions AB
>> > http://www.goodsolutions.se
>> >
>> >
>> > _______________________________________________
>> > Ironpython-users mailing list
>> > Ironpython-users at python.org
>> > http://mail.python.org/mailman/listinfo/ironpython-users
>> >
>>
>>
>>
>> --
>> Website: http://earl-of-code.com
>>
>
>
>
> --
>
> Med vänlig hälsning,
>
> Mattias Ahlenius
> 031 - 788 19 25
>
> Good Solutions AB
> http://www.goodsolutions.se
>
>


-- 
Website: http://earl-of-code.com
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