Exercise 1: Service without Configuration

In WCF 4 you can create a service without any configuration at all. In this exercise, you will create a working WCF service with no configuration.

Task 1 – Creating the Web Site

1. Start Microsoft Visual Studio 2010 from Start | All Programs | Microsoft Visual Studio 2010.

2. Create a new Empty ASP.NET Web Application.

   Setting	Value
   Language	Visual C# or Visual Basic
   Target Framework	.NET Framework 4
   Installed Templates	Web
   Template	ASP.NET Empty Web Application
   Name	WCF4Configuration
   Location	Source\Ex1-NoConfig\Begin
   Solution Name	WCF4Configuration

   Figure 1

   Create a new Empty ASP.NET Web Application – C#

   Figure 2

   Create a new Empty ASP.NET Web Application – Visual Basic

Task 2 – Creating the WCF Service

1. Right-click the WCF4Configuration web site, point to Add and select NewItem.

   Setting	Value
   Language	Visual C# or Visual Basic
   Installed Templates	Web
   Template	WCF Service
   Name	EchoService.svc

   Figure 3

   Create a new service named EchoService.svc – C#

   Figure 4

   Create a new service named EchoService.svc – Visual Basic

2. Open IEchoService and modify it as shown in the following code.

   (Code Snippet - What is new in WCF4 Lab - IEchoService Interface CSharp)

   C#

   [ServiceContract] public interface IEchoService { [OperationContract] string Echo(string message); }

   (Code Snippet - What is new in WCF4 Lab - IEchoService Interface VB)

   Visual Basic

   <ServiceContract()> Public Interface IEchoService <OperationContract()> Function Echo(ByVal message As String) As String End Interface

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3. Right-click EchoService.svc file, and select View Code.

4. Add the following namespace

   C#

   using System.Globalization;

   Visual Basic

   Imports System.Globalization

5. Delete the DoWork method and modify EchoService to implement the Echo operation as shown.

   (Code Snippet - What is new in WCF4 Lab - Echo method CSharp)

   C#

   public string Echo(string message) { if (string.IsNullOrEmpty(message)) throw new ArgumentNullException("message"); return string.Format(CultureInfo.InvariantCulture, "Echo: {0}", message); }

   (Code Snippet - What is new in WCF4 Lab - Echo method VB)

   Visual Basic

   Public Function Echo(ByVal message As String) As String Implements IEchoService.Echo If (String.IsNullOrEmpty(message)) Then Throw New ArgumentNullException("message") End If Return String.Format(CultureInfo.InvariantCulture, "Echo: {0}", message) End Function

6. Open Web.config and comment out the entire <system.serviceModel> section by selecting it and pressing CTRL+K,CTRL+C

Next Step

Exercise 1: Verification