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Source Code

The MathWindowsServiceHost project is located under the Chapter 25 subdirectory.

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Invoking a Service Asynchronously

Create a new Console Application named MathClient and set a Service Reference to your running

WCF service that is current hosted by the Windows service running in the background using the

Add Service Reference option of Visual Studio. Don’t click the OK button yet, however (see 

Figure 25-18).

Figure 25-18.

Referencing our MathService

Notice that the Add Service Reference dialog box has an Advanced button in the lower-left cor-

ner. Click this button now to view the additional proxy configuration settings (see Figure 25-19).

Using this dialog box, we can elect to generate code that allows us to call the remote methods

in an asynchronous manner, provided we check the Generate Asynchronous Operators check box.

Go ahead and check this option for the time being. 

The other option on this dialog box you should be aware of is the Add Web Reference button. If

you have a background in building XML web services in Visual Studio 2005 or earlier, you may recall

that you had an Add Web Reference option rather than an Add Service Reference option. If you click

this particular button, you will be able to receive proxy code that will allow you to communicate

with a traditional web service described within an *.asmx file.

The remaining options of this dialog box are used to control the generation of data contracts,

which we will examine a bit later in this chapter. In any case, be sure you did indeed check the

Generate Asynchronous Operators check box and click OK on each dialog box to return to the Visual

Studio IDE.

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