WCF BASICS 2

1) ServiceContract & Implementation

you need a contract  (=Interface with     [ServiceContract] Attribute) like

    [ServiceContract]
    public interface IService1
    {
        [OperationContract]
        string GetData(int value);

which contains Methods attributed with [OperationContract]

implement the [ServiceContract] Interface:

    public class Service1 : IService1
    {
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }

assume its in namespace WcfServiceLib for hosting below

2) Host the ServiceContract

2a) with IIS

you need a .svc file with one single line:

<%@ServiceHost Service="WcfServiceLib.Service1"%>

and configure the service (provide metadata) within the web.config:

    <system.serviceModel>

      <behaviors>

        <serviceBehaviors>

          <behavior name="MyServiceTypeBehaviors">

            <serviceMetadata httpGetEnabled="true" />

            <serviceDebug includeExceptionDetailInFaults="false" />

          </behavior>

        </serviceBehaviors>

      </behaviors>

        <service name="WcfServiceLib.Service1"      behaviorConfiguration="MyServiceTypeBehaviors">

          <endpoint address="" binding="wsHttpBinding"

               contract="WcfServiceLib.IService1"/>

          <endpoint contract="IMetadataExchange"

             binding="mexHttpBinding" address="mex"/>

        </service>

      </services>

    </system.serviceModel>

2b) With .net app:

        static void Main(string[] args)

        {

            Type serviceType = typeof(MyWCFServices.HelloWorldService);

            string httpBaseAddress = ConfigurationManager.AppSettings["HTTPBaseAddress"];

            Uri[] baseAddress = new Uri[] { new Uri(httpBaseAddress) };

            ServiceHost host = new ServiceHost(serviceType, baseAddress);

            host.Open();

            Console.WriteLine("HelloWorldService is now running. at: " +host.BaseAddresses.First());

            Console.WriteLine("Press any key to stop it ...");

            Console.ReadKey();

            host.Close();

        }