Custom activity with Flowchart behaviour RRS feed

  • Question

  • Want to create a custom activity which can be used for flowcharting.

    Since Flowchart is a sealed class, We tried implementing "IActivityTemplateFactory" and returning a flowchart activity instance, however the custom properties that we have defined in our custom activity are not comming through the property window. We realised that the custom activity is just a flowchart instance.

    How can we get the additional properties and behaviours in the custom activity along with flowchart?


    Wednesday, October 27, 2010 4:03 PM


All replies

  • Hi,

    Could you make it more clear what exactly do you want? If you just want to add some properties to an activity, I think you can use attached property. you can see this blog post for samples: https://blogs.msdn.com/b/mwinkle/archive/2009/12/06/wf4-design-time-attachedpropertiesservice-and-attached-properties.aspx

    If you want to implement your custom activity that looks like flowchart with different behavior, you need start from scratch and build your own version of flowchart. Tim has a series posts about that, you can take a look: http://blogs.msdn.com/b/tilovell/archive/2009/12/31/freeform-custom-activity-designers-using-icompositeview.aspx



    This posting is provided "AS IS" and confers no rights or warranties.
    Wednesday, October 27, 2010 4:21 PM
  • Thanks, it helps us.
    Friday, October 29, 2010 12:20 PM
  • For anyone looking further at the 'implement your own flowchart' option, I would also strongly suggest you see the code of State Machine on wf.codeplex.com.
    Friday, October 29, 2010 5:49 PM
  • Hi,

    I need to develop a custom activity which contain a FlowChart activity as an inbuilt one. Basically the requirement is to have FlowChart activity as the ROOT activity when the user wanted to create a new WF in the WPF rehosted designer. . . something similar to Sequence activity that is comming as default ROOT activity........ I did achieved this and the following is the sample code.....

    namespace CustomActivities
        public sealed class CustActivity : NativeActivity
            public Collection<Activity> Activities { get; set; }
            public CustActivity()
                Activities = new Collection<Activity>();
                System.Activities.Statements.Flowchart fl = new System.Activities.Statements.Flowchart();

            protected override void CacheMetadata(NativeActivityMetadata metadata)
            protected override void Execute(NativeActivityContext context)

     Here the problem is, whenever the workflow is saved and reopened in the WF designer, the FlowChart activity is getting duplicated . . .. because the constructor creates a new FlowChart . .. I don't want this duplicate. How to achieve this ?


    Monday, November 8, 2010 1:38 PM