Beginning Web Development, Silverlight, and ASP.NET AJAX

CHAPTER 9 ■ .NET 3.0: WINDOWS WORKFLOW FOUNDATION 219
WorkflowInstance instance =
workflowRuntime.CreateWorkflow(typeof(SecondWorkflowApp.Workflow1),parameters);
}
}
instance.Start();
waitHandle.WaitOne();
Now that you’re passing parameters to the workflow, the workflow has to know how
to accept them—and it does this using the .NET property model. If you look at the preceding
listing, you’ll see that a parameter called age is used. Thus, you’ll need to have a
settable age property in your workflow. You can do this by adding some simple code to
Workflow1.designer.cs:
partial class Workflow1
{
}
private int ageVal=0;
public int age
{
set { ageVal = value; }
}
private CodeActivity codeActivity2;
private IfElseBranchActivity ifElseBranchActivity2;
private IfElseBranchActivity ifElseBranchActivity1;
private IfElseActivity ifElseActivity1;
private CodeActivity codeActivity1;
This code has a private variable that is used to store the age, and a public settable
one that maps whatever comes into the private variable.
The next step is to add the workflow activities. For this application, you are going to
implement an IfElse activity driven off a simple rule. If the entered age is over 100, you
will go down one activity route; otherwise you will go down another.
Drag an IfElse activity onto the design surface. The Designer should look like
Figure 9-7.