Microsoft Windows Workflow Foundation 4.0 Cookbook by Andrew Zhu

By Andrew Zhu

It is a fast moving and to-the-point guide, it takes you thru the real elements you should be aware of while operating with home windows WF. the diversity of subject matters that we disguise during this booklet is pushed via what the operating developer must comprehend. it truly is neither a finished connection with the complete WF structure, nor a strategic advisor to the entire program improvement lifecycle. if you end up operating with home windows Workflow beginning 4.0 and you have got easy wisdom of C#/.NET Framework/ VB and workflow, this booklet is for you. it will likely be top if you happen to understand either C# and VB, simply because WF 4.0 expression can basically be written in VB (at the time of writing). With this publication, it is possible for you to to augment your purposes with versatile workflow services utilizing WF 4.0. To stick to the recipes, it is important to be pleased with .NET Framework, C# programming, fundamentals of SOA, and the way to advance them.

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Ii. In the bottom of the designer panel, click the Arguments button, and click Create Argument to create an OutArgument string named OutMessage. iii. Drag two WriteLine activities from Toolbox into the Sequence activity and fill the textboxes with "Start…" and "End" respectively. 15 Workflow Program iv. Drag an Assign activity from Toolbox to the designer panel. Fill the right expression box with OutArgument as OutMessage, whereas fill the right expression box with the following string: This is a message from workflow.

Press Ctrl+F5 to build and run the workflow without debugging. The application should run in a console window and print the message as shown in the following screenshot: How it works... The following code block initializes the InArgument value: IDictionary input = new Dictionary() { {"InOutMessage","Now, I am InMessage"} }; This statement will run the workflow program with the input dictionary. Invoke(new Workflow1(),input); The string Now, I am InMessage is printed by the workflow.

We can see the following screenshot: Input the following VB Expression code in the Default Expression textbox of the variable people: New List(Of Person) From { New Person("Andrew", 26), New Person("Jophy", 25), New Person("Steven", 29) } 44 Chapter 2 5. Author a workflow: Add a Sequence activity to the designer panel, and then add a ForEach activity to the Sequence activity. Click ForEach, in its Properties panel browse for the TypeArgument property, and select Person. Input From a In people in the value expression.

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