Workflow Foundation (IfElse)

Windows Workflow Foundation comes with .NET Framework 3.0 and not many people that I know is using it.

 

It is quite different to create a Workflow as compare to normal Console or Windows application. It is not easy to find a simple sample just with few lines of code to demo a Workflow as well.

 

Follow the few steps below to create a simplest ifElse Workflow. 

 

1. Start Visual Studio 2008

 

2. File -> New -> Project

 

3. On New Project Dialog select Workflow.  

 

4. Under Templates: choose Sequential Workflow Console Application

  createconapp

 

In my sample, I have created a very simple account class as below:

 

namespace WorkflowConSamplest

{

  class account

  {

    public float amount;

  }

}

 

5. Double click the Workflow Designer (by default should be Workflow1.cs). You will see the following screen.

 

WorkflowDesigner

 

6. Drag the code from the Toolbox to the designer.

 

 

Code 

  desingercode

 

7. Name the code SetAmount in the Properties Window. Double click the SetAmount Code then add the code as below:

 

private void SetAmount_ExecuteCode(object sender, EventArgs e)

{

  objacc.amount = 1000;

}

 

IfElse

 

8. Drag the IfElse Control from the Toolbox and drop in below the code

 

IfElseBlock

 

9. Click the ifElseBranchActivity1 then select Declarative Rule Condition

 

10. Expand the Condition by click the + sign

 

11. Type CheckAmount in ConditionName

 

12. Type this.objacc.amount > 999 in Expression

 

condition

 

13. Drag the code from the Toolbox and drop it after ifElseBranchActivity1 then set the Name property to PrintInterest. Add the following code:

 

private void PrintInterest_ExecuteCode(object sender, EventArgs e)

{

  Console.WriteLine("Your interest {0}", (1000 * 0.05));

}

 

14. The end result might look like below. You are set to go.

 

End

 

The complete code is in http://skydrive.live.com. The sample file name is WorkflowConSamplest.rar My MSN ID is chanmmn@hotmail.com.

 

Resources:

http://code.msdn.microsoft.com/learnWF

 

 

 

About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress (http://www.pcworld.com/article/206455/Microsoft_Live_Spaces_Moves_to_WordPress_An_FAQ.html) till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
This entry was posted in .Net. Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.