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Adding a Code Activity

The first activity you will add in the sequence is a Code activity. To do so, drag a Code activity

component from the Windows Workflow Toolbox and drop it onto the line connecting the starting

and ending points of the workflow. Next, use the Properties window to rename this activity as

ShowInstructionsActivity. At this point, your designer should look like Figure 26-6.

Figure 26-6.

A (not quite ready for prime time) Code activity

As you can see, the designer is currently reporting an error, which you can view by clicking

the red exclamation point on top of the Code activity. The error informs you that the ExecuteCode

value has not been set, which is a mandatory step for all Code activity types. Not too surprisingly,

ExecuteCode establishes the name of the method to execute when this task is encountered by the

WF runtime engine.

Using the Properties window, set the value of ExecuteCode to a method named

ShowInstructions. Once you press the Enter key, the IDE will update the primary *.cs code file

with the following stub code:

public sealed partial class ProcessUsernameWorkflow : SequentialWorkflowActivity

{

public ProcessUsernameWorkflow()

{

InitializeComponent();

}

private void ShowInstructions(object sender, EventArgs e)

{

}

}

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