Sample WCF Server and Client program

Server Side coding:

1. Start-> Program-> VS2008

2. Open File-> New -> Project-> Project Type = WCF and Template = WCF Service Library

     Give the Project name as Calculator -> Select Location to save -> OK

3.Now you can find IService1.cs and Service1.cs, delete both that boiler plate files.

4. Click Add-> Class-> ICalculator.cs

   Now change the class into interface.     

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.ServiceModel;

namespace WCFCalculator

{

    [ServiceContract] //WCF contract for interface

    public interface ICalculator

    {

        [OperationContract] //Service Contract with WCF

        float add(int a, int b);

        [OperationContract]

        float sub(int a, int b);

        [OperationContract]

        float div(int a, int b);

        [OperationContract]

        float mul(int a, int b);

    }

}

5. Then We need implement that interface, So Click Add->Class->Calculator.cs

    It is the server side implementation of code.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace WCFCalculator

{

    class Calculator :ICalculator

    {

        #region ICalculator Members

        public float add(int a, int b)

        {

            return (a + b);

        }

        public float sub(int a, int b)

        {

            return (a - b);

        }

        public float div(int a, int b)

        {

            if (b != 0)

            {

                return a / b;

            }

            else

            {

                return 0;

            }

        }

        public float mul(int a, int b)

        {

            return (a * b);

        }

        #endregion

    }

}

6. Then open App.config in the solution explorer , the you could find that boiled code Service1 configuration, now you need to replace with your Calculator configuration.

<?xml version="1.0" encoding="utf-8" ?>

<configuration>

  <system.web>

    <compilation debug="true" />

  </system.web>

  <!-- When deploying the service library project, the content of the config file must be added to the host's

  app.config file. System.Configuration does not support config files for libraries. -->

  <system.serviceModel>

    <services>

      <service name="WCFCalculator.Calculator" behaviorConfiguration="WCFCalculator.CalculatorBehavior">

        <host>

          <baseAddresses>

            <add baseAddress = "http://localhost:8731/Design_Time_Addresses/WCFCalculator/Calculator/" />

          </baseAddresses>

        </host>

        <!-- Service Endpoints -->

        <!-- Unless fully qualified, address is relative to base address supplied above -->

        <endpoint address ="" binding="wsHttpBinding" contract="WCFCalculator.ICalculator">

          <!--

              Upon deployment, the following identity element should be removed or replaced to reflect the

              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity

              automatically.

          -->

          <identity>

            <dns value="localhost"/>

          </identity>

        </endpoint>

        <!-- Metadata Endpoints -->

        <!-- The Metadata Exchange endpoint is used by the service to describe itself to clients. -->

        <!-- This endpoint does not use a secure binding and should be secured or removed before deployment -->

        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>

      </service>

    </services>

    <behaviors>

      <serviceBehaviors>

        <behavior name="WCFCalculator.CalculatorBehavior">

          <!-- To avoid disclosing metadata information,

          set the value below to false and remove the metadata endpoint above before deployment -->

          <serviceMetadata httpGetEnabled="True"/>

          <!-- To receive exception details in faults for debugging purposes,

          set the value below to true.  Set to false before deployment

          to avoid disclosing exception information -->

          <serviceDebug includeExceptionDetailInFaults="False" />

        </behavior>

      </serviceBehaviors>

    </behaviors>

  </system.serviceModel>

</configuration>

7. Then Run it by pressing F5, then you will following output.

 Now Server is ready for serve.

Open Visual Studio 2008 Command Prompt-> and type following command

svcutil.exe /language:cs /out:generatedProxy.cs /config:app.config http://localhost:8731/Design_Time_Addresses/WCFCalculator/Calculator/

then you will get generatedProxy.cs, app.config as output

Way to write the client code to invoke the server:

1. Add new project by clicking the Add-> New Project -> ADD Windows application.(CalculatorApps)

2. Now rightclick (CalculatorApps)-> Add Exsisting item-> Add generatedProxy.cs and app.config(Which we are generated  in  preceding step)

3. Now right Click Add reference-> .NET(TAB)-> Add System.ServiceModel reference to your client project

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.ServiceModel;

namespace CalculatorApps

{

    public partial class Form1 : Form

    {

        CalculatorClient client;

        public Form1()

        {

            InitializeComponent();

        }

        private void btnAdd_Click(object sender, EventArgs e)

        {

            int a = Convert.ToInt32(txtValues1.Text);

            int b = Convert.ToInt32(txtValues2.Text);

           MessageBox.Show("The result is "+ client.add(a,b).ToString());

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            //Now we used WSHttpBinding Binding

            WSHttpBinding binding = new WSHttpBinding();

            //End point address for remote access

            EndpointAddress address = new EndpointAddress("http://localhost:8731/Design_Time_Addresses/WCFCalculator/Calculator");

            // create the object for client proxy

            client = new CalculatorClient(binding, address);

        }

    }

}

 like wise you have to do min, mul, div operation by adding buttons.