private void editPreviewActivity_ExecuteCode(object sender, EventArgs e) { Stopwatch functionCallingStopwatch = null; long millisecondsToken = 0; CultureInfo oldCurrentCulture = Thread.CurrentThread.CurrentCulture; CultureInfo oldCurrentUICulture = Thread.CurrentThread.CurrentUICulture; try { IXsltFunction xslt = this.GetBinding <IXsltFunction>("CurrentXslt"); string xslTemplate = this.GetBinding <string>("XslTemplate"); IFile persistemTemplateFile = IFileServices.TryGetFile <IXsltFile>(xslt.XslFilePath); if (persistemTemplateFile != null) { string persistemTemplate = persistemTemplateFile.ReadAllText(); if (this.GetBinding <int>("XslTemplateLastSaveHash") != persistemTemplate.GetHashCode()) { xslTemplate = persistemTemplate; ConsoleMessageQueueFacade.Enqueue(new LogEntryMessageQueueItem { Level = LogLevel.Fine, Message = "XSLT file on file system was used. It has been changed by another process.", Sender = this.GetType() }, this.GetCurrentConsoleId()); } } List <NamedFunctionCall> namedFunctions = this.GetBinding <IEnumerable <NamedFunctionCall> >("FunctionCalls").ToList(); // If preview is done multiple times in a row, with no postbacks an object reference to BaseFunctionRuntimeTreeNode may be held // If the function in the BaseFunctionRuntimeTreeNode have ben unloaded / reloaded, this preview will still run on the old instance // We force refresh by serializing / deserializing foreach (NamedFunctionCall namedFunction in namedFunctions) { namedFunction.FunctionCall = (BaseFunctionRuntimeTreeNode)FunctionFacade.BuildTree(namedFunction.FunctionCall.Serialize()); } List <ManagedParameterDefinition> parameterDefinitions = this.GetBinding <IEnumerable <ManagedParameterDefinition> >("Parameters").ToList(); Guid pageId = this.GetBinding <Guid>("PageId"); string dataScopeName = this.GetBinding <string>("PageDataScopeName"); string cultureName = this.GetBinding <string>("ActiveCultureName"); CultureInfo cultureInfo = null; if (cultureName != null) { cultureInfo = CultureInfo.CreateSpecificCulture(cultureName); } IPage page; TransformationInputs transformationInput; using (new DataScope(DataScopeIdentifier.Deserialize(dataScopeName), cultureInfo)) { Thread.CurrentThread.CurrentCulture = cultureInfo; Thread.CurrentThread.CurrentUICulture = cultureInfo; page = DataFacade.GetData <IPage>(f => f.Id == pageId).FirstOrDefault(); if (page != null) { PageRenderer.CurrentPage = page; } functionCallingStopwatch = Stopwatch.StartNew(); transformationInput = RenderHelper.BuildInputDocument(namedFunctions, parameterDefinitions, true); functionCallingStopwatch.Stop(); Thread.CurrentThread.CurrentCulture = oldCurrentCulture; Thread.CurrentThread.CurrentUICulture = oldCurrentUICulture; } string output = ""; string error = ""; try { Thread.CurrentThread.CurrentCulture = cultureInfo; Thread.CurrentThread.CurrentUICulture = cultureInfo; var styleSheet = XElement.Parse(xslTemplate); XsltBasedFunctionProvider.ResolveImportIncludePaths(styleSheet); LocalizationParser.Parse(styleSheet); XDocument transformationResult = new XDocument(); using (XmlWriter writer = new LimitedDepthXmlWriter(transformationResult.CreateWriter())) { XslCompiledTransform xslTransformer = new XslCompiledTransform(); xslTransformer.Load(styleSheet.CreateReader(), XsltSettings.TrustedXslt, new XmlUrlResolver()); XsltArgumentList transformArgs = new XsltArgumentList(); XslExtensionsManager.Register(transformArgs); if (transformationInput.ExtensionDefinitions != null) { foreach (IXsltExtensionDefinition extensionDef in transformationInput.ExtensionDefinitions) { transformArgs.AddExtensionObject(extensionDef.ExtensionNamespace.ToString(), extensionDef.EntensionObjectAsObject); } } Exception exception = null; HttpContext httpContext = HttpContext.Current; Thread thread = new Thread(delegate() { Thread.CurrentThread.CurrentCulture = cultureInfo; Thread.CurrentThread.CurrentUICulture = cultureInfo; Stopwatch transformationStopwatch = Stopwatch.StartNew(); try { using (ThreadDataManager.Initialize()) using (new DataScope(DataScopeIdentifier.Deserialize(dataScopeName), cultureInfo)) { HttpContext.Current = httpContext; var reader = transformationInput.InputDocument.CreateReader(); xslTransformer.Transform(reader, transformArgs, writer); } } catch (ThreadAbortException ex) { exception = ex; Thread.ResetAbort(); } catch (Exception ex) { exception = ex; } transformationStopwatch.Stop(); millisecondsToken = transformationStopwatch.ElapsedMilliseconds; }); thread.Start(); bool res = thread.Join(1000); // sadly, this needs to be low enough to prevent StackOverflowException from fireing. if (res == false) { if (thread.ThreadState == System.Threading.ThreadState.Running) { thread.Abort(); } throw new XslLoadException("Transformation took more than 1000 milliseconds to complete. This could be due to a never ending recursive call. Execution aborted to prevent fatal StackOverflowException."); } if (exception != null) { throw exception; } } if (xslt.OutputXmlSubType == "XHTML") { XhtmlDocument xhtmlDocument = new XhtmlDocument(transformationResult); output = xhtmlDocument.Root.ToString(); } else { output = transformationResult.Root.ToString(); } } catch (Exception ex) { output = "<error/>"; error = string.Format("{0}\n{1}", ex.GetType().Name, ex.Message); Exception inner = ex.InnerException; string indent = ""; while (inner != null) { indent = indent + " - "; error = error + "\n" + indent + inner.Message; inner = inner.InnerException; } } finally { Thread.CurrentThread.CurrentCulture = oldCurrentCulture; Thread.CurrentThread.CurrentUICulture = oldCurrentUICulture; } Page currentPage = HttpContext.Current.Handler as Page; if (currentPage == null) { throw new InvalidOperationException("The Current HttpContext Handler must be a System.Web.Ui.Page"); } UserControl inOutControl = (UserControl)currentPage.LoadControl(UrlUtils.ResolveAdminUrl("controls/Misc/MarkupInOutView.ascx")); inOutControl.Attributes.Add("in", transformationInput.InputDocument.ToString()); inOutControl.Attributes.Add("out", output); inOutControl.Attributes.Add("error", error); inOutControl.Attributes.Add("statusmessage", string.Format("Execution times: Total {0} ms. Functions: {1} ms. XSLT: {2} ms.", millisecondsToken + functionCallingStopwatch.ElapsedMilliseconds, functionCallingStopwatch.ElapsedMilliseconds, millisecondsToken)); FlowControllerServicesContainer serviceContainer = WorkflowFacade.GetFlowControllerServicesContainer(WorkflowEnvironment.WorkflowInstanceId); var webRenderService = serviceContainer.GetService <IFormFlowWebRenderingService>(); webRenderService.SetNewPageOutput(inOutControl); } catch (Exception ex) { FlowControllerServicesContainer serviceContainer = WorkflowFacade.GetFlowControllerServicesContainer(WorkflowEnvironment.WorkflowInstanceId); Control errOutput = new LiteralControl("<pre>" + ex.ToString() + "</pre>"); var webRenderService = serviceContainer.GetService <IFormFlowWebRenderingService>(); webRenderService.SetNewPageOutput(errOutput); } }