Beginning Web Development, Silverlight, and ASP.NET AJAX

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CHAPTER 9 ■ .NET 3.0: WINDOWS WORKFLOW FOUNDATION
9. You’ll see that the WebServiceInput and WebServiceOutput activities are no longer
showing any errors. However, you still need to perform one more step—the conversion
of centigrade to Fahrenheit, which you do by adding a new Code activity
between the existing activities (see Figure 9-17).
Figure 9-17. Adding a Code activity between the input and the output
10. Generate an ExecuteCode handler using the Properties dialog, and the IDE will generate
the code handler, wire it up to the workflow, and then open the code
window. Edit the handler so that it reads like this:
private void codeActivity1_ExecuteCode(object sender, EventArgs e)
{
_fahrenheit = 32 + ((9 * _centigrade) / 5);
}
The environment is taking the burden of mapping the input from the web service
caller to _centigrade, and mapping _fahrenheit to the output that is sent back to
the caller. This function derives one from the other using the standard centigradeto-Fahrenheit
formula.
11. The next step is to publish this library as a web service. You do this by selecting the
project in the Solution Explorer, right-clicking, and selecting Publish as Web Service
from the context menu (see Figure 9-18).