Download Beginning WF: Windows Workflow in .NET 4.0 by Mark Collins PDF

By Mark Collins

Kurzbeschreibung

Windows Workflow beginning is a ground-breaking addition to the middle of the .NET Framework so as to orchestrate human and process interactions as a sequence of workflows that may be simply mapped, analyzed, adjusted, and carried out. As enterprise difficulties turn into extra advanced, the necessity for a workflow-based answer hasn't ever been extra obtrusive. WF presents an easy and constant method to version and enforce advanced difficulties. As a developer, you specialize in constructing the company common sense for person workflow projects. The runtime handles the execution of these projects once they were composed right into a workflow. starting WF demonstrates, in an eminently readable and available type, how Microsoft's Workflow origin (WF) know-how can be utilized in a wide selection of functions. * Loaded with plenty of uncomplicated but demonstrative pattern initiatives * Very hands-on with functional "how-to" details * listed by means of function so particular questions are simply spoke back What you will study starting WF will take you step-by-step via a number of the important functions of workflow expertise. alongside the way in which, you are going to: * Create designer-based and code-based workflows * speak among purposes utilizing workflow actions * enforce SQL patience with customized contributors * Create workflow extensions and customized actions * construct purposes that aid long-running workflows * Host workflows in WCF prone Who this ebook is for This e-book is ideally suited to somebody utilizing or contemplating Microsoft's home windows Workflow beginning. It describes what WF can do for you and the way to fast examine the elemental strategies had to be expert. in case you are actively imposing a workflow undertaking, this publication has plenty of pattern initiatives that exhibit the main worthwhile layout styles. desk of ContentsChapter 1: development an easy Workflow bankruptcy 2: Coded Workflows bankruptcy three: Flowchart Workflow bankruptcy four: Passing Arguments bankruptcy five: Replicated actions bankruptcy 6: Exception dealing with bankruptcy 7: Extending the integrated actions bankruptcy eight: ship and obtain bankruptcy nine: speaking with the Host program bankruptcy 10: internet providers bankruptcy eleven: SQL endurance bankruptcy 12: customized Extensions bankruptcy thirteen: monitoring bankruptcy 14: Transactions bankruptcy 15: Transactions with patience bankruptcy sixteen: WorkflowServiceHost bankruptcy 17: reimbursement, affirmation, and Cancellation bankruptcy 18: Collections bankruptcy 19: Interoperability with Workflow 3.5 bankruptcy 20: coverage

Über den Autor

Mark Collins has constructed software program for over 25 years, as a rule utilizing the Microsoft stack. He has served many jobs together with improvement supervisor, architect, workforce lead, database administrator, and venture supervisor. He has vast event in retail (point-of-sale and stock) and shopper dating administration (CRM) recommendations. Mark at present serves as a senior software program engineer for a nonprofit association, delivering a customized CRM, mail processing, and success approach.

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Extra resources for Beginning WF: Windows Workflow in .NET 4.0

Example text

Recall from Chapter 1 that when you added activities to a Sequence, they were always executed in top-down order. You could control the order by rearranging the activities, but they were always aligned vertically and spaced evenly, and the arrows between the activities were drawn for you automatically. With a Flowchart activity, you can place the activities anywhere on the palette. And more importantly, you have to draw the arrows. But herein lies the power of the Flowchart activity; you can draw a connection back to a previous activity.

The workflow is actually stateless; it doesn’t store any data elements. The Variable classes are simply data definitions. To get the actual data from a Variable class, you’ll use its Get() method. This requires a token of sorts, which is an ActivityContext class. This is used to differentiate the values for this particular workflow instance from others that might be running concurrently. The value returned from Get(env) is then compared to see whether it’s greater than 12. Get(env)), Body = new Sequence() { DisplayName = "Sound Bell" // Code to be added here in Level 3 } The Condition property on the While activity is identical to the If activity.

Connect the Evening branch of the second FlowDecision to “Evening” and the Afternoon branch to “Afternoon”. Your flowchart should look like the one shown in Figure 3-8. Figure 3-8. cs file. This code is identical to the file generated in Chapter 1. ReadLine(); This keeps the console app from exiting before you can read the results. Press F5. Depending on the time of day, your results should be similar to the following: 37 CHAPTER 3 n FLOWCHART WORKFLOW Hello, World! Good Evening Press ENTER to exit Flow Switch A FlowSwitch activity works like a FlowDecision except instead of being restricted to a True and False branch, you can define an unlimited number of branches.

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