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  • Blog Post: Using standard icons in a rehosted Workflow Designer

    In this post I’ll show how you can easily use appropriate icons within the Workflow Designer toolbox. There are a number of posts out on the web that show varying ways to do this, however the method I’m proposing is most probably the easiest and most flexible. In days of yore you would...
  • Blog Post: Adding a Context Menu item to a Workflow 4 designer

    I’m in a curious time-warp this week, as I’ve just been asked how to do something in WF4 that I wrote about for WF3 in September 2005 . Anyhow, a customer of mine asked how to add an item to the context menu for an activity within the design surface, and so here goes… Firstly you...
  • Blog Post: Using WIF with Workflow Services

    Windows Identity Foundation integrates with WCF at the host level (ServiceHost) and then various WIF extensibility points are invoked at different stages of WCF message processing pipeline. In this post, I will show how WIF can be integrated with Workflow Services to enable common security scenarios...
  • Blog Post: A practical State Machine example

    Now that the State Machine Activity Pack has been released on Codeplex (see http://wf.codeplex.com for details) I thought I should resurrect one of the samples I regularly used in the 3.x days to show a state machine example. The point of this example is to show how the state machine activities could...
  • Blog Post: Creating multiple activities from the toolbox

    This blog post will show you how you can add a custom tool to the toolbox which, when selected, will drop a custom activity onto the designer surface. In addition I’ll also show how to get non-activity classes onto the toolbox. There are many times when you might want to do this – a couple...
  • Blog Post: Designers for custom activities

    When writing a custom activity you’ll typically want to provide a custom designer which is used when rendering your activity on the design surface. Visual Studio will look for designers using a couple of methods – one old, one new. In this post I’ll show how to use both methods and...
  • Blog Post: Integrating WIF with WF 4.0 and AppFabric

    WIF is framework to claim-enable ASP.net applications and WCF services. WF 4.0 introduced a new paradigm for developing services (known as Workflow Services), whose implementation is based on workflow. Windows Server AppFabric provides the hosting, management & monitoring capabilities for services...
  • Blog Post: Messaging activities intricacies

    WF 4 introduced messaging activities which provides a visual way of creating web services and their clients. In VS 2010 when you do “Add Service Reference” (in a workflow project), the wizard automatically generates activities and config in contrast to imperative code and config (the legacy way J )....
  • Blog Post: Managing OperationContext in WF 4

    Managing OperationContext in WF 4 using the ISendMessageCallback & IReceiveMessageCallback WF 4 raised the level of abstraction for writing workflow services and their clients by defining Send & Receive messaging activities. These activities hides lot of WCF plumbing from you and as result...
  • Blog Post: Introducing Workflow Security Pack

    Have you already started serious development with WF 4 and found security limitations? Have you struggled to implement authenticated messaging, claims-based security, role-based security and other security features in workflow solutions? WF 4 is a highly extensible framework so most of these features...
  • Blog Post: Authenticated messaging in WF 4

    Authenticated messaging is one limitation in WF 4 as currently there is no API for setting up credentials to be used with a Send activity. Having said that, ChannelFactory used by Send activity still picks up the behaviour configuration from the config file. So you can potentially write a custom...
  • Blog Post: PrincipalPermission Authorization in WF 4

    In last post , I have shown you how to get hold of OperationContext when using messaging activities. Once you got hold of OperationContext, you can use it to perform many useful tasks and one of them is Authorization. Let’s start by defining a Scope activity to hook our IReceiveMessageCallback implementation...
  • Blog Post: Durable Duplex Messaging in .Net 4 Beta2

    Here I talked about couple of approaches to enable durable duplex messaging in .Net 3.5. .NET 4 has added first class support for durable duplex messaging by extending Context Exchange Protocol to include a CallbackContext. So in addition to instanceId, a client application can send a callback context...
  • Blog Post: What's new in WF v4.0

    Zulfiqar has posted a quick overview on his blog of what's new in WF v4.0, the post can be seen below, to view more of Zulfiqars posts please visit his blog http://www.zamd.net/ At the PDC .net Framework 4.0 was announced which will be released along with Visual Studio 2010. Along with .Net Framework...
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