By Kenn Scribner
Get hands-on advice for utilizing Microsoft home windows Workflow starting place to create process-managed functions for Microsoft Windows—one step at a time. knowing home windows Workflow origin is key for each developer who works with a number of functions and companies that needs to alternate information or effects. home windows Workflow beginning defines a strategy movement among humans, functions, and services—mapping dependencies and sequences to permit automation of projects throughout formerly stand-alone courses. With step-by-step, you're employed at your individual velocity via hands-on, learn-by-doing routines to appreciate the center features and primary innovations for operating with home windows Workflow starting place. New-to-topic builders can take a sequential method of figuring out workflows and studying the way to create home windows Workflow Foundation–enabled purposes and prone. This ebook encompasses a CD with perform workouts and code samples to aid builders speed up their productivity.
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Extra resources for Windows Workflow Foundation Step By Step
Example text
The primary activity, or root activity is referred to as the workflow definition. The workflow definition normally acts as a container for the other activities that will actually do the work. Note A workflow definition is what you ask the workflow runtime to execute, whereas an instance is an executing workflow definition. There is a distinct difference. One is executing and the other is not. However, I’ll use the terms interchangeably throughout this chapter, and even in the rest of the book, because in the end we’re interested in executing software, not just in writing it.
BizTalk Server is designed to integrate multiple businesses, or put another way, to facilitate electronic commerce. WF, on the other hand, is designed to work at the operating-system level and is therefore appropriate for integration into a single application within a single domain. That’s not to say you can’t communicate with external processes and servers using WF, but WF’s primary focus is facilitating workflow functionality within your application. BizTalk is designed for interapplication (multiple applications) use, while WF is focused on intraapplication (single application) functionality.
While we’re at it, we’ll also mark the class as static to prevent direct Chapter 2 The Workflow Runtime 31 instantiation (it’s a factory class, after all). To make all this happen, we’ll change the class definition from this class WorkflowFactory to this: public static class WorkflowFactory With WorkflowFactory in hand, any part of your application can request the workflow runtime without getting slammed with an InvalidOperationException. Later, starting in Chapter 5, we’ll make slight revisions to this class to account for other startup services we might want to include.