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As you can see in Figure 6-2, the project contains the App_Code folder containing the C# code and the Serviceasmx file as part of the project The generated code is a complete web service, ready to host with IIS Let s assume we hosted this service with local IIS Now, what do you think this service is supposed to do This service will simply return a Hello World message to the client application that consumes it Before we build and host this web service with local IIS, let s pay attention to the following important things: The namespace The Serviceasmx file The web method A namespace is needed to uniquely identify the web service As you can see in Figure 6-2, VS gives the default name http://tempuriorg/ It is your responsibility to change it; you can use any name as long as you feel it is unique.

The best practice here is to use a convention like http://ServiceNameCompanyNameorg In practice, this could translate to http://CalculateAnnualSalesBestHomeConstructionsorg/, where ServiceName is CalculateAnnualSales and CompanyName is BestHomeConstructions Now, you know about the namespace, so what about the Serviceasmx file The main use of this file is to display the information about the various methods that are part of this web service It also provides the WSDL information You might be wondering if all this information is stored inside the file Well, no If you open the Serviceasmx file, you ll notice that it only contains the following text: <%@ WebService Language="C#" CodeBehind="~/App_Code/Servicecs" Class="Service" %> As you can see, all it has is the scripting language information and location of the code behind the file When you request the ASMX page through IIS, ASP .

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Table 10-2 shows the primary namespaces in .NET Framework DLLs from Table 10-1. In some cases, parts of these libraries are covered elsewhere in this book; the table notes these cases. For example, 4 introduced portions of the .NET I/O library from the System.IO namespace. Table 10-2. Namespaces in the DLLs from Table 10-1, with MSDN Descriptions

You add an else-if condition by clicking the Add "Else-If" Conditional Branch link in the Workflow Designer. You set up the else-if condition in exactly the same way as you would a regular condition. The only difference is that at runtime, the else-if branch will be evaluated only if the parent condition evaluates to false. If the parent condition evaluates to true, then the else-if condition will never process. We ll see this later in the chapter when we build our own custom workflow. It is also possible to set up a step with no condition. In this case, the step would always process. Use this if the actions in the step should be executed for each instance of this workflow, regardless of any other factors. There are countless cases where this would be necessary, including the following: Logging the initiation, conclusion, or an internal milestone of a workflow Notifying the originator of the initiation, conclusion, or an internal milestone of their workflow Requiring all documents in the workflow to pass legal review before being published To set up a condition-less step, simply add an action to the step but no condition. Actions are covered next.

NET uses this information to generate the content displayed in the web browser (the web methods and their descriptions) Let s move on to learn about web methods I m sure most of you have already guessed that this is the function part of the web service As you can see in Figure 6-2, Visual Studio generates a default web method called HelloWorld You can add as many web methods as you like to your web service..

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