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Looks like there is a bug in DynamicEngine. When I tried the old
way, it works: private void UserControl_Loaded(object sender, RoutedEventArgs ev) { IPloader = new BackgroundWorker(); IPloader.DoWork += new DoWorkEventHandler((s, e) => { ScriptRuntimeSetup setup = new ScriptRuntimeSetup(); setup.LanguageSetups.Add(Python.CreateLanguageSetup(null)); setup.HostType = typeof(Microsoft.Scripting.Silverlight.BrowserScriptHost); setup.DebugMode = true; runtime = new ScriptRuntime(setup); engine = Python.GetEngine(runtime); foreach (string str in new string[] { "mscorlib", "System", "System.Windows", "System.Windows.Browser", "System.Net" }) { runtime.LoadAssembly(runtime.Host.PlatformAdaptationLayer.LoadAssembly(str)); } // engine.Execute("import imptest"); --this does not work } ); IPloader.RunWorkerCompleted += new RunWorkerCompletedEventHandler((s, e) => { this.textBlock1.Text = "IronPython loaded"; } ); IPloader.RunWorkerAsync(); } What does not work is importing modules in the background thread (commented line). It throws the following exception: System.InvalidOperationException was unhandled by user code Message=This operation can only occur on the UI Thread. StackTrace: at Microsoft.Scripting.Actions.Calls.MethodCandidate.Caller.Call(Object[] args, Boolean& shouldOptimize) at IronPython.Runtime.Types.BuiltinFunction.BuiltinFunctionCaller`5.Call4(CallSite site, CodeContext context, TFuncType func, T0 arg0, T1 arg1, T2 arg2, T3 arg3) at System.Dynamic.UpdateDelegates.UpdateAndExecute6[T0,T1,T2,T3,T4,T5,TRet](CallSite site, T0 arg0, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5) at IronPython.Runtime.Importer.Import(CodeContext context, String fullName, PythonTuple from, Int32 level) at IronPython.Runtime.Operations.PythonOps.ImportTop(CodeContext context, String fullName, Int32 level) at Microsoft.Scripting.Interpreter.FuncCallInstruction`4.Run(InterpretedFrame frame) at Microsoft.Scripting.Interpreter.Interpreter.Run(InterpretedFrame frame) at Microsoft.Scripting.Interpreter.LightLambda.Run1[T0,TRet](T0 arg0) at IronPython.Compiler.RuntimeScriptCode.InvokeTarget(Scope scope) at IronPython.Compiler.RuntimeScriptCode.Run() at Microsoft.Scripting.SourceUnit.Execute() at Microsoft.Scripting.Hosting.ScriptSource.Execute() at Microsoft.Scripting.Hosting.ScriptEngine.Execute(String _expression_) at SLHosting.MainPage.<UserControl_Loaded>b__0(Object s, DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e) at System.ComponentModel.BackgroundWorker.OnRun(Object argument) InnerException: runtime.ImportModule("imptest"); is similar story so I guess it cannot be done, right? -- -- Lukáš On 18.8.2010 5:05, Jimmy Schementi wrote: True, but according to his exception stack it never gets there ... it throws on the "runtime = DynamicEngine.CreateRuntime(true);" line. It throws because somewhere in that method it doesn't dispatch to the UI thread as you described. Those are the fixes I need to do. |
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