Beginning WF: Windows Workflow in .NET 4.0 (Expert's Voice by Mark Collins

By Mark Collins

Starting WF demonstrates, in an eminently readable and available variety, how Microsoft’s Workflow starting place (WF) know-how can be utilized in a wide selection of functions. This booklet has plenty of pattern tasks that display the main invaluable layout styles, and is geared up intuitively through characteristic so particular questions are simply spoke back. instead of easily describing the know-how, this booklet is undertaking concentrated. every one bankruptcy exhibits the reader how you can construct an software after which explains all of the new ideas that have been brought. So with every one successive bankruptcy, the reader is developing themselves and experiencing the know-how. each one idea or function is additionally listed so the reader may also use this as a hand-on reference. both approach, the reader will simply learn how to develop into educated in Workflow beginning.

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Draw a connection from each of the WriteLine activities to the Parallel activity. Your workflow should look like the one shown in Figure 3-12. 40 CHAPTER 3 n FLOWCHART WORKFLOW Figure 3-12. Adding a Parallel activity Adding the Branches Double-click the Parallel activity and drag three WriteLine activities onto it. One of these activities will display the date; another will display the time; and another will display the day of the week. ToString("dddd") The diagram should look like the one shown in Figure 3-13.

CreateWorkflow() is a method that you’ll implement now. Defining the Workflow As I mentioned in the last chapter, a workflow is just a collection of nested properties. To be more accurate, it is a collection of nested classes and their properties. To simplify this process, I’ll show you the implementation to enter, one level at a time. I’ll explain what the code is doing as you go. Hour }; Variable counter = new Variable() { Name = "counter", Default = 1 }; 24 CHAPTER 2 ■ CODED WORKFLOWS return new Sequence() { }; } The CreateWorkflow() method first creates two Variable template classes of type int, called numberBells and counter.

Listing 1-2. Else> I made some lines bold to help you find the top-level activities. First, the Variables section defines the two variables you created. Then there’s a WriteLine activity named “Hello” and an If activity named “Adjust for PM”. This is followed by a While activity named “Sound Bells”, a WriteLine activity named “Display Time”, and an If activity named “Greeting”. One key point that I want you to see is that there is no executable code here. This file is just a nested collection of properties.

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