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154 Articles match "Workflow"

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  • Rehosting the Workflow Designer in WF4
    Beta 2 With Windows Workflow Foundation 3 it was possible to rehost the workflow designer in your own application. With Windows Workflow Foundation 4 live has become much better on the rehosting front In fact it is possible to create the fully functional and useful workflow editor below in about 200 lines of code. And loading or saving a workflow is easy to, all it takes is a Load() and Save() function pointing to a XAML file. One thing that is needed is to register the workflow activity designer metadata. Validating the workflow. null ). {.
    The Problem Solver - Wednesday, December 23, 2009
  • Windows Workflow Foundation 4 and persistence
    The persistence class out of the box is called SqlWorkflowInstanceStore and as the name suggests it saves workflow data in either SQL Server 2005 or 2008. We can attach it to either a WorkflowApplication or a WorkflowServiceHost and persist workflows when we want. This can be used to run only short lived workflows and doesn’t support persistence. var instanceStore = new SqlWorkflowInstanceStore(connStr); WorkflowApplication app = new WorkflowApplication(workflow); app.InstanceStore = instanceStore; app.Run(); Okay its a little more involved then that. Enjoy!
    The Problem Solver - Thursday, November 19, 2009
  • Workflow Receive activity and message correlation
    With WF4 it is quite easy to use data that is part of the request message, for example an order identifier, to route multiple WCF messages to the same workflow. It is also possible to have multiple messages that can start a new workflow. In this blog post I am going to show both these concepts in a single workflow. This workflow is going to be able to receive three different messages, AddItem, AddExpensiveItem and Submit. Either AddItem or AddExpensiveItem can start a new workflow while Submit can only be done with an existing workflow. ReferenceID0.
    The Problem Solver - Wednesday, April 28, 2010
  • Hiding the XAMLX from a workflow service
    In Windows Workflow Foundation 4 it’s easy to create a workflow and expose it as a WCF service. But one thing is that it exposes a XAMLX endpoint to each client can see the service actually implemented as a workflow service instead of a regular service. One way to hide that is to use a regular SVC file as the implementation and point that to a workflow using the WorkflowServiceHostFactory. First we need to use a regular workflow instead of a workflow service. Tags: NET Workflow WCF WF4 VS2010 data]. data.ToString()]. Enjoy!
    The Problem Solver - Tuesday, May 18, 2010
  • Online Workflow 4 presentation
    Attached are the PowerPoint sheets and samples from my online Window Workflow Foundation 4 presentation today. Tags: NET Workflow WCF webcast WF4 VS2010 Let me know if you have any questions. WF4Demo.zip www.TheProblemSolver.nl Wiki.WindowsWorkflowFoundation.eu.
    The Problem Solver - Tuesday, December 1, 2009
  • Doing synchronous workflow execution using the WorkflowApplication
    The WorkflowApplication is a great way to execute your workflows in process. For example executing a workflow and updating the state of the user interface is much simpler when the WorkflowApplication.Run() doesn’t finish until all work is done. Take this very simple workflow and its execution output. var workflow = new Sequence(). {. Executing the workflow synchronously. Making this workflow execute in a synchronous fashion is easy and requires only a very small change by setting the SynchronizationContext to a custom implementation. Activities = {.
    The Problem Solver - Friday, January 7, 2011
  • Flowcharts in Workflow 4 and the Switch activity
    Flowcharts are a nice addition to Windows Workflow Foundation 4. They allow for a lot of pretty complex behavior that is hard to do in a sequential workflow. In WF 3 we used to model these complex behaviors as state machine workflows. Enter the flowchart in Windows Workflow Foundation 4 One of the good things is that a flowchart is not another workflow type. No it is just another activity to drop in a workflow. So you are free to combine sequential work with a flowchart in one workflow. Tags: NET Workflow WF4 VS2010 So far so good. Enjoy!
    The Problem Solver - Tuesday, October 27, 2009
  • Versioning long running Workflow Services in WF4
    One of the problems with the current version of Windows Workflow Foundation is how to handle different versions of your workflows. With short running workflows this is no big deal, workflows do whatever they are supposed to do and finish, and you can deploy a newer updated version of your XAMLX files whenever you want. However as soon as we get into long running workflows and the SQL Workflow Instance Store things get quite a bit more complicated. It uses this data to differentiate between different workflow service definition. Unfortunately not.
    The Problem Solver - Thursday, November 4, 2010
  • Flowing transaction into a workflow using WF4
    Beta 2 One of the things that wasn’t possible in Windows Workflow Foundation 3 was flowing transaction over a WCF service request into a workflow. Fortunately that is one the problems that Windows Workflow Foundation 4 solves for us. In WF4 we can use the ReceiveAndSendreply template to configure a workflow as a service and accept WCF calls. If we want to use transactions we need to add the TransactedReceiveScope to the workflow. Tags: NET Workflow WCF WF4 VS2010 Beta2 Note: This blog post is written using the.NET framework 4.0 else. {. Enjoy!
    The Problem Solver - Monday, December 21, 2009
  • What's New in Windows Workflow Foundation in.NET 4.5 (part 1)
    Search Searching through workflows is another big one. With small workflows it is quite easy to see where a variable is used but when workflows get bigger this becomes an increasingly hard problem. With WF4 I typically solve this by opening the workflow XAML in a text editor and searching the raw XML. The new search capability will let you search through a workflow in the designer, as you really should, just as any other Visual Studio artifact. www.dotnetevents.nl.NET Workflow WF4 Futures dotnetmagfeatures where announced. Auto surround with a Sequence.
    The Problem Solver - Tuesday, September 27, 2011
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