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• Memory leak when using Workflow 4.0 SqlWorkflowInstanceStore and PersistableIdleAction.Unload

  - by Rohland

  Hi, This particular problem is driving me nuts. I wonder if anyone has experienced a similar problem. If I load up a workflow then unload it and perform a memory snapshot then the result is predictable - my workflow is no longer in memory. However, if I load up a workflow and set the PersistableIdle action to PersistableIdleAction.Unload and let the workflow idle the workflow remains in memory even though the Unload action fires. I used ANTS Memory Profiler to debug this issue. This is the object retention graph outputted showing that an internal object is hanging onto my workflow instance. Can anyone else verify this problem? My code amounts to the following: Create SqlWorkflowInstanceStore and setup lock owner handle -- At this point I take a memory snapshot Create an instance of Workflow1 Set the PersistableIdle action Apply the instancestore to Workflow1 Setup action event handlers for Idle, Unload, UnhandledException etc. Persist the workflow instance Run the workflow instance Wait for instance to idle (caused by Delay activity) Ensure the Unload action is fired -- At this point I take a second memory snapshot From the above image, it is clear that the only object referencing Workflow1 is some internal event handlers result which I have no ability to dispose of. Any clues?

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• What is the proper way to convert a NSTimeInterval to a string, that works internationally?

  - by Alex Gosselin

  I know the quick and dirty way of dividing by 60 to get minute, hours, etc But is there an official way in the API already implemented, and using the appropriate language for minutes, seconds, etc? Thanks for any help.

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• Loading a Workflow 4 from xaml file and adding it to workflowdesigner

  - by Jimmy Engtröm

  Hi I have created a couple of activities and stored them as XAML. Opening them in the Workflowdesigner works great and I can Execute them. Now I would like to create a new Activity and add the activities I created to it. Basically loading it from the XAML and into the designer as part of another activity/flow. I have tried adding my activities to the toolbox but the render as dynamicactivity and (understandably) does not work. Any suggestions? Is it even possible? /Jimmy

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• WF4 - Display workflow design in asp.net and highlight an activity

  - by jikan_the_useless

  i need to display current status of a document approval workflow task in asp.net web page with a specific activity highlighted. i have seen the visual workflow tracker example (in wf&wcf samples) but i have two issues, 1-i have to render workflow in asp.net not in a wpf app. 2-i don't need to display current status with workflow running, all activities that need to highlighted are the one that require user input. e.g. "waiting for approval from department head" etc. if i could just convert the workflow xaml to jpg after highlighting a specific activity by activity id that created a bookmark and waiting to resume the bookmark it would do the work.

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• FSEventStream best practice. Single stream watching multiple directories? Or one stream per director

  - by anthony

  Title should be self explanatory. I'm interested in first hand experience, or specific documentation that describes which approach is preferable and why.

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• State Machine WF: Issues with workflow termination

  - by AgentHunt

  Hello, We have a state machine workflow for maintaining the state of an application submitted by a user. One of the issues I am having is related to workflow termination. In one of the states, I had a bug. When the application reached that state, it threw an exception and as a result, the terminate event of the workflow was called and the particular workflow instance got removed from the persistence database. So I am not able to load that workflow instance anymore. I would have hoped, if there is an error in one of the states, an exception would be thrown(so that we know what the issue is), yet the entire workflow instance should not disappear. Can the fault handler activity ensure that the workflow does not terminate. Also, is there a way, when the terminate event is called, the instances do not get removed from the persistence store. Thanks for any help/suggestions.

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• How to pass EventArgument information from view to view model in WPF?

  - by Ashish Ashu

  I have ListView control in my application which is binded to the collection of CustomObject List<CustomObject. The CustomObject has seperate view. This ListView has seperate view model. The collection List _customobject is containted in the ListView ViewModel class. My Query: I want to invoke a view that show properties of custom object, when user double click on any row of ListView. The ListView double click command is binded to the ListViewDoublClick Command in the view model. The CustomObject is in the event argument of listview double click command. To acheive this I have to pass the custom object ( or an unique id property of custom object through which I can retrieve the custom object from the collection) as command parameter. Please suggest me the solution!!

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• Can't check in due to conflicting changes

  - by themaninthesuitcase

  I have an issue that means I cannot check in changes even if I resolve the issues. I have removed a form from the solution then created a new form with the same name. Now when I go to check in the form I get the following error: Even if I mark all the conflicts as resolved the check in fails with the following error: All conflicts resolved but no files checked in due to initial conflicts. How can I get this to check in?

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• How do you build a Windows Workflow Project with NAnt 0.90?

  - by LockeCJ

  I'm trying to build a Windows Workflow (WF) project using NAnt, but it doesn;t seem to be able to build the ".xoml" and ".rules" files. Here is the code of the csc task that I'm using: <csc debug="${build.Debug}" warninglevel="${build.WarningLevel}" target="library" output="${path::combine(build.OutputDir,assembly.Name+'.dll')}" verbose="${build.Verbose}" doc="${path::combine(build.OutputDir,assembly.Name+'.xml')}"> <sources basedir="${assembly.BaseDir}"> <include name="**/*.cs" /> <include name="**/*.xoml" /> <include name="**/*.rules" /> </sources> <resources basedir="${assembly.BaseDir}"> <include name="**/*.xsd" /> <include name="**/*.resx" /> </resources> <references> ... </references> </csc> Here's the output: Compiling 21 files to 'c:\Output\MyWorkFlowProject.dll'. [csc] c:\Projects\MyWorkFlowProject\AProcessFlow.xoml(1,1): error CS0116: A namespace does not directly contain members such as fields or methods [csc] c:\Projects\MyWorkFlowProject\BProcessFlow.xoml(1,1): error CS0116: A namespace does not directly contain members such as fields or methods [csc] c:\Projects\MyWorkFlowProject\CProcessFlow.rules(1,1): error CS0116: A namespace does not directly contain members such as fields or methods [csc] c:\Projects\MyWorkFlowProject\CProcessFlow.xoml(1,1): error CS0116: A namespace does not directly contain members such as fields or methods

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• Please suggest me the ( Interaction model of view model) MVVM design in the simple scenario discusse

  - by Jack

  Data Layer I have an Order class as an entity. This Order entity is my model object. Order can be different types, let it be A B C D Also Order class may have common properties like Name, Time of creation, etc. Also based on the order type there are different fields that are not common. View Layer The view contains the following Main Menu ListView The Main Menu contains the drop down menu button which is used to create the order based on the type selected from the drop down. The drop down contains the Order types ( A ,B , C and D). There are different user control based on the order type. Like for example if user chooses to create an order of type A then different view with different inputs field is popped up. Hence, there are four user control for each order type. If user selects A option from the drop down then Order of type A is created and vica versa. Now below is the List View that contains the List of orders so far created by the user. To Edit any particular order user may double click the list view row. Based on the order type clicked by the user in the listview, the view of that order type opens in edit mode. For example if user selects an order type A from the list view then view for order type A open in edit mode. Please suggest me interaction model for view model's in the scenario discussed above. Please excume me if the query is very basic, since I am new new to MVVM and WPF ,

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• CRM 2011 XAML Workflows in VS 2012

  - by AlexR

  I'm writing this knowing there's another topic like this to be found here the answer provided however does not make much sense to me and whatever I tried doesn't seem to work so I'm seeking clarification. The situation is as follows: * New CRM 2011 toolkit solution * New project added for Xaml workflow * Adding CRM "Workflow" activity causes error The error: It shows a redbox "Could not generate view for Workflow" The Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. --- System.IO.IOException: Cannot locate resource 'workflowdesigner.xaml' I have VS 2012 SP2 with the latest (June) CRM SDK Toolkit installed. I did a clean install of the toolkit so it's not "upgraded" to prevent any old assemblies being referenced. I tried the things from the referenced question and moved the assemblies over and also re-referenced the latest assemblies to make sure everything works fine. I also tried downloading a workflow XAML created in CRM and opening but it gives the same error. I also opened the "example" workflow XAML solution in the SDK, again same result.

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• "type not defined" exception with WF4 RC

  - by avi1234

  Hi, I`m gettin the following exception while invoking my workflow (dynamically): The following errors were encountered while processing the workflow tree: 'DynamicActivity': The private implementation of activity '1: DynamicActivity' has the following validation error: Compiler error(s) encountered processing expression "TryCast(simplerule_out,OutputBase2)". Type 'OutputBase2' is not defined. 'DynamicActivity': The private implementation of activity '1: DynamicActivity' has the following validation error: Compiler error(s) encountered processing expression "Res". Type 'OutputBase2' is not defined. 'DynamicActivity': The private implementation of activity '1: DynamicActivity' has the following validation error: Compiler error(s) encountered processing expression "Res". Type 'OutputBase2' is not defined. 'DynamicActivity': The private implementation of activity '1: DynamicActivity' has the following validation error: Compiler error(s) encountered processing expression "New List(Of OutputBase2)". Type 'OutputBase2' is not defined. The workflow is very simple and worked fine on VS 2010 beta 2! All I`m trying to do is to create new list of my abstract custom type "OutputBase2". public class OutputBase2 { public OutputBase2() { } public bool Succeeded { get; set; } } class Example { public void Exec() { ActivityBuilder builder = new ActivityBuilder(); builder.Name = "act1"; var res = new DynamicActivityProperty { Name = "Res", Type = typeof(OutArgument<List<OutputBase2>>), Value = new OutArgument<List<OutputBase2>>() }; builder.Properties.Add(res); builder.Implementation = new Sequence(); ((Sequence)builder.Implementation).Activities.Add(new Assign<List<OutputBase2>> { To = new VisualBasicReference<List<OutputBase2>> { ExpressionText = res.Name }, Value = new VisualBasicValue<List<OutputBase2>>("New List(Of OutputBase2)") }); Activity act = getActivity(builder); var res2 = WorkflowInvoker.Invoke(act); } string getXamlStringFromActivityBuilder(ActivityBuilder activityBuilder) { string xamlString; StringBuilder stringBuilder = new StringBuilder(); System.IO.StringWriter stringWriter = new System.IO.StringWriter(stringBuilder); System.Xaml.XamlSchemaContext xamlSchemaContext = new System.Xaml.XamlSchemaContext(); System.Xaml.XamlXmlWriter xamlXmlWriter = new System.Xaml.XamlXmlWriter(stringWriter, xamlSchemaContext); System.Xaml.XamlWriter xamlWriter = System.Activities.XamlIntegration.ActivityXamlServices.CreateBuilderWriter(xamlXmlWriter); System.Xaml.XamlServices.Save(xamlWriter, activityBuilder); xamlString = stringBuilder.ToString(); return xamlString; } public Activity getActivity(ActivityBuilder t) { string xamlString = getXamlStringFromActivityBuilder(t); System.IO.StringReader stringReader = new System.IO.StringReader(xamlString); Activity activity = System.Activities.XamlIntegration.ActivityXamlServices.Load(stringReader); return activity; } } Thanks!

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• How to force a workflow to terminate?

  - by Zé Carlos

  How can i abruptly terminate a workflow in a middle of an activity interrupting the flow sequence?

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• Is possible to integrate elmah wit wf-wcf services using web.config?

  - by tartafe

  Hi, i'm developing an enterprise application using asp.net mvc, wf-wcf services and normal wcf. I want use a unique point of view of unmanaged exception and my problem is integrate wf-wcf services with ELMAH. The problem is that in wf-wcf i can't decorate di class with the elmah attribute so i make that using web.config if is possible. Someone can help me? (here is a discussion how integrate elmah with wcf using attribute http://stackoverflow.com/questions/895901/exception-logging-for-wcf-services-using-elmah) thanks in advance F.

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• How to integrate NUnit tests into a TFS 2010 build

  - by Kevin McMahon

  What is the best way to integrate nunit tests into TFS 2010? Is it via generic tests or is there a better approach to running them?

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• SynchronizationContext and Bookmarks in WF4

  - by DBatisse

  I am running workflows under asp.net and using SynchronizationContext to make the page "wait" for the workflow. Here is how I run the workflow instance under asp.net: var workflowApplication = new WorkflowApplication(activity); SynchronizationContext syncContext = SynchronizationContext.Current; workflowApplication.Completed = delegate { syncContext.OperationCompleted(); }; workflowApplication.SynchronizationContext = syncContext; syncContext.OperationStarted(); workflowApplication.Run(); In one of the activities I use a bookmark. Now I want the page processing to continue whenever I call CreateBookmark. I tried calling SynchronizationContext.Current.OperationCompleted() before setting the bookmark but that crushes asp.net site when the workflow resumes and completes (I think the workflow instance calls OperationCompleted again when it completes and the error raises) How can I work with bookmarks under Asp.Net, any ideas?

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• How to implement reject in parallel approval workflow?

  - by Dmitry Martynov

  I develop a SharePoint workflow with a Replicator activity to replicate a custom activity for every approver. The custom activity implements an approval branch for a particular user. It has classic form with CreateTask, While, OnTaskChanged and CompleteTask activities. I setup UntilCondition on the replicator to cancel execution after one approver chooses to reject the approval and then workflow finishes. The problem happens with other uncompleted tasks which "hang" in their current state. User does not see this state when open the task. I put UpdateAllTasks after the replacator to set the task status to Cancelled. But since there is no event activities between CompleteTask (for the rejected task) and UpdateAllTasks, the UpdateAllTask activity set Cancelled for the rejected task also. The question, what can I do to flush the pending change made by CompleteTask before UpdateAllTasks? Or perhaps, there is another way to implement such workflow. I was thinking about the way to implement Cancel handler for the custom activity with UpdateTask. But I do not know how to implement it and tell to the cancel handler that it executes in the case of the rejection.

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• Is possible to integrate elmah with wf-wcf services using web.config?

  - by tartafe

  Hi, i'm developing an enterprise application using asp.net mvc, wf-wcf services and normal wcf. I want use a unique point of view of unmanaged exception and my problem is integrate wf-wcf services with ELMAH. The problem is that in wf-wcf i can't decorate di class with the elmah attribute so i make that using web.config if is possible. Someone can help me? (here is a discussion how integrate elmah with wcf using attribute http://stackoverflow.com/questions/895901/exception-logging-for-wcf-services-using-elmah) thanks in advance F.

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• iPhone programming - problem with CoreFoundation forking, PLEASE for the love of god help! lol

  - by Tom

  Hello all, I've been working on an iPhone for several months. It's a 2d shooting game akin to the old Smash TV type games. I'm doing everything alone and it has come out well so far, but now I am getting unpredictable crashes which seem to be related to CoreFoundation forking and not exec()ing, as the message THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONA LITY_YOU_MUST_EXEC__ always shows up somewhere in the debugger. Usually it shows up around a CFRunLoopRunSpecific and is related to either a timer firing or _InitializeTouchTapCount. I cannot figure out exactly what is causing the fork to occur. My main game loop is running on a timer, first updating all the logic and then drawing everything with openGL. There is nothing highly complex or unusual. I understand you cannot make CF calls on the childside of a fork, or access shared memory and things like that. I am not explicitly trying to fork anything. My question is: can anyone tell me what type of activity might cause CoreFoundation to randomly fork like this? I'd really like to finish this game and I don't know how to solve this problem. Thanks for any help.

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• DefaultSchedulerService in ASP.NET application

  - by Samir P

  Hi, My project has a requirement to implement look-ahead caching i.e. triggering another request on invokation of a specific request. The following details in short the implementation - HttpModule parses the SOAPRequest and matches entry in a configuration file for look-ahead candidate. If the request matches, it prepares the Parameters dictionary and starts appropriate workflow. Single workflow runtime is used across all requests is ensured through initializing the runtime instance at Application_Start event and stored in Application Dictionary. Using persistence service and DefaultScheduler service. We can't implement windows service model, as current requirement mandates passing the SOAPRequest parameters as arguments. ManualSchedulerService is not in contention due to synchronous nature of it's actual behaviour. Still the performance is pretty bad and product team is not happy. Can anybody suggest me better solution? Thanks, Samir

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• Windows Workflow foundatation scheduling.

  - by MushRoom

  If I have an ASP.NET app hosting a worflow where a trouble ticket passes through a fairly standard flow....at one point there needs to be an escalation occurring if a ticket has not been looked at or resolved in 6 months. Now lets say the 6 months have passed, but the IIS machine has been rebooted last month and not used. Will the workflow escalate the ticket? When/how does the runtime check conditions on long running processes? Does it scan through the 1000's of workflows looking...or have an events table it checks? Does it even handle this kind of out-of-process workflow? Seems like it would be a very common situation for a WF to handle but i can't seem to find any information.

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• Resources for Customizing TFS Build 2010

  - by Vaccano

  I am looking to create a way to build my Legacy Delphi 5 and 6 apps via TFS Build (using TFS 2010). I was fairly dangerous with the MSBuild way of doing things and I think I can still do that, but I would like to get into the Work Flow way of doing it. Are there any resources out there that discuss customizing a TFS Build via Windows Work Flow? Especially how to override the solution concept and how to compile and report errors. Thanks for any info.

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• Why does my Workflow Service (4.0) variable go null in a DoWhile Activity?

  - by jlafay

  I have a WF service that I'm trying to setup receive activities to "Subscribe" and "Unsubscribe". I'm using This WF Durable Duplex Tutorial as a basis because my service performs callbacks to clients. Basically, think of it as a chat service. I can make client calls to the two receive activities just fine. What happens is the callback address of the client is passed in to Subscribe() on the service. The address is stored as a variable in the WF service and everything looks like it would work as to be expected. When a client calls Unsubscribe(), my watch I have set on the address var during debugging shows it as null. So what gives? Here's the basic setup of my WF service layout... Everything is enveloped in a DoWhile activity. Inside of that is a Pick activity and two Pick branches. The first branch is for subscribing activities. It has a receive-sendreply activity that assigns the string passed by the client to the WF address var. The second branch handles unsubscribing. The trigger is the Request activity and the client address is again passed in. From there it goes into a sequence, starting with an If. It checks to see if the unsubscribeAddress equals the address already subscribed. If it does, then it sets the address to String.Empty and sends a success message back to the client. Why would a variable that's scoped to the enveloping DoWhile activity be implicitly assigned to null? I'm trying to get this to work so I can implement multiple client subscribers from there and work on triggers that invoke callbacks to multiple clients. CONCAT EDIT: I set a breakpoint at the DoWhile level and my var is null once Unsubscribe() is called. When Subscribe() is invoked, the watch shows a value in the var all the way through. Until I Unsubscribe() with a client. Should I be using a While Activity instead?

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• What are the recommended BEST CASE hardware requirements for TFS 2010

  - by Doug

  Hi guys, i have installed TFS 2010 in a 2 server setup with an App Tier server and a SQL Server and am not 100% happy with the performance. Both are running in VM's on SAN disks and have been given the following virtual hardware each: Windows 2008 R2 1 CPU @ 2.8Ghz 2gb RAM what should i lift - neither machine is hammered but both do go up to 80% when people are doing things on them - should i add another CPU to each - usually this is now required in a VMWARE setup but i don't know if TFS 2010 takes advantage of an extra core??? thank you in advance :-)

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• How do I pass argument from an activity to another in Workflow 4

  - by Jimmy Engtröm

  Hi I have created an Activity (CodeActivity) that retrieves the temperature where I live. I wan't to add that activity to a workflow and connect it to an if statement/activity that can based on my temperature outargument do different things. But I can't seem to find how to access the outargument from my temperature-activity. This is my first Windows Workflow 4 project so perhaps I'm attacking this in the wrong way. I have: public OutArgument Degrees { get; set; } But how do I access it? I have found tutorials how to get the data when running the activity (only one) but not as part of a workflow. Hope my question makes sence. /Jimmy

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