Answer Questions

• Bugged WWF Designer Hosting

  i want to host WWF foundation on web application, so can plz guid me you can rehost a usercontrol that contains a WorkflowView control ( and associated DesignSurface, and WorkflowLoader) ( as in Designer rehosting sample in the SDK). and then embedd that user control into a webpage,(host the assembly containing the control in a webserver too). This also means you need to have Windows Workflow Foundation ...Show All

• Steve Hittle Multiple Webcams with DirectShowNet

  Hi all I need to know if it's possible to capture 2 streams from 2 USB webcams with DirectShowNet at the same time What if the webcams are of the same type Thanks! Rudi Hi Kastanienreis, I have the exact same problem you had, I'm trying to use 2 different webcams of the same model (Philips ToUcam Pro II). It seems that since they have the exact same name, I can't use both at the same time... Have you ...Show All

• Erik van Noorden hi james ,about your asp.net web apps

  i download your asp.net workflow example ,and follow your readme.mht,but it's wrong ,can you tell why ,thanks. -------------------------------------------------------------------------- Timeout expired.  The timeout period elapsed prior to completion of the operation or the server is not responding. Description: An unhandled exception occurred during the execution of the current web request. Please rev ...Show All

• Mario Esposito - MSFT Unable to detect parity errors with Windows SDK on a MI port Card Series (PCI serial card)

  We are using a 9-bit protocol which sometimes sends a mark state and sometimes sends a space stage.  When a space state is sent we want to be able to get a parity error in SDK.  We can see the parity error in the hardware register but we want to be able to see the error with Windows SDK software.  When we connect to a standard 232 serial port on a PC we are able to see the errors in SDK but when we add serial ports with th ...Show All

• KoryS Rules and non-public fields/properties

  I've started playing with WWF this week, and noticed something I noticed is that if you are defining a rule for an activity (say, a condition from an If's branch), and you add a predicate to it, the designer (in this case, the rules expression editor) uses the "this." syntax to refer to properties of the workflow class and it's methods. However, it seems the designer will only allow you to use public properties and methods here, not private one ...Show All

• Conversion Creating Custom State Activity

  I need to create a custom state activity with a code activity in the StateInitialization activity. Can someone please tell me how to create a custom state activity (what methods i need to override) and how to add the StateInitialization activity to my custom activity Please take a look at this thread and see if it gives the information that you need: http://forums.microsoft.com/MSDN/showpost.aspx postid ...Show All

• Luis Huapaya how to detect lost windows network connection?

  I have established a connect and disconnect functionality using the WNetAddConnection2 and WNetCancelConnection2. Everything works fine and I can detect and cater for the errors whenever they occur with connection and disconnection. The problem came when I wanted to add a function to detect whenever a connection is lost, and attempt to reconnect. I've reviewed the msdn library and it turned up a sizeable variety or 'get' type functions which ret ...Show All

• Donna M. Singel Communication with the underlying transaction manager has failed.

  Does anyone know how to resolve this exception. Exception: Message: Communication with the underlying transaction manager has failed. Stack Trace: System.Transactions.TransactionManagerCommunicationException: Communication with the underlying transaction manager has failed. ---> System.Runtime.InteropServi ces.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component. at Syste ...Show All

• mjones20 Folder Redirection

  Anyone know how to redirect the my Documents folder in Vista In 2k and XP you can right click, go to properties and change the location. In Vista, I can't. Any ideas I think you should try the group policy setting for it. Josh http://windowsconnected.com I tried to find a GPO for this but its either not there or well hidden :( ...Show All

• RoboSchro Usings Custom Activities

  Hi I created a WWF project that includes a custom activity and a test project that uses this activity. I added the custom activity to the ToolBox using "Tools-->Choose ToolBox Items-->Activities". I then dropped the activity from the ToolBox on my workflow. VS then added a refernce from my test project to the dll which contains the custom activity. Apparently, this forces VS to load the dll, and prevents my solution ...Show All

• Paul Hammond DeInterlacing video when using DV cam

  when using DV cam there is interlacing in the video...how to DeInterlace the video. If u use windows Encoder it also shows interlaced video but there is property to DeInterlace it any such options in DirectShow.. What have you tried try ffdShow filter or VMRx....dont know much probably u urself ve to read it on. ffdShow is VC++ ...difficult to understand..any idea of doing it in C#.... I am ...Show All

• killerless UnloadOnIdle no longer works in Web.Config.

  How has this parameter changed Perfect....Side note, where did you find the answer Joe, This parameter can be configured through persistenceservice. You can set it in config file or through code in the workflow host C# Code Sample WorkflowRuntime container = new WorkflowRuntime (); string connectionString = "Initial Catalog=WorkflowStore;Data Source=loca ...Show All

• RBolander Where is the visual layout state for the state transition root activity stored (and why is it being lost)?

  When you open the completed sample for Exercise 2 of WWF Lab 4 (the State Transitition workflow sample) for the first time, the layout for the 4 activities is lost.  By this I mean all of the 4 acitivities appear one on top of the other in the top-left corner of the design surface. Q1. Why is the visual layout of the 4 activities being lost If I rearrange the activities and save them, close the solution and re-open it, the layout is preser ...Show All

• Anonym0us i can run the debug result correctly, but the release result not, why

  Hi, guys. i use the VMR7 to render my video, i use the pGraph->Connect(pPreviewpin, pVMR7Inputpin) method to connect those two pins, the pPreviewpin is a pointer point to the preview pin, the pVMR7Inputpin is a pointer point to the VMR7's input pin. then, i built this project, it is ok. now, i run it, the debug result is run correct, but the release result is run a error. the error is 'can't to connect the preview pin to the vmr7's i ...Show All

• cosmos38240 Workflow wont compile when i use ConfigurationManager.ConnectionStrings[""]

  the following code fails to compile. Could not create activity of Type 'WorkflowConsoleApplication1.Workflow1'. System.NullReferenceException. Object reference not set to an instance...when i double click on the error list in VS i get a message box "Cannot open file 'c:\bla...'. Verify that the file exists and try again..." //WF BETA 2.2 Steps to recreate: create a new sequential console app project. drop a code activity with ...Show All