Create WCF Service without using Wizard

Introduction

Windows Communication Foundation (WCF) is an SDK for developing and deploying services on Windows.

WCF provides a runtime environment for services, enabling you to expose CLR types as services, and to consume other services as CLR types.

Service: the functionality exposed to the world

Client: consuming the functionality from the service.

Main Components

1. Endpoint
2. Hosting environment
3. Service class

The Endpoint in WCF Is ABC

• A- Address (where)
• B-Binding (How)
• C-Contract

WCF supports following transport schemas

• HTTP
• TCP
• Peer network
• IPC (Inter-Process Communication over named pipes)
• MSMQ

Contracts in WCF

• Service Contract
  
     - Service Contract (at class level)
     - Operation Contract(at method level)
  
  
• Data Contract
  
     - Data contract (at class level)
     - Data Member (at property level)
  
  
• Fault Contract
• Message Contract

Hosting of WCF

1. IIS
2. Self Hosting
3. WAS (Windows Activation Service)

Implementation

STEPS FOR WCF IMPLEMENTATION

• Console application
• Add reference system.serviceModel.dll
• Include the namespace System.ServiceModel;

Server Side

• Create a service contract
  

  [ServiceContract (Namespace=http://.......)] (this is for an interface)

• Create an Interface
  

  Public interface Icalc
  {
     …
     …
  }

• Declare an method of each operation with OperationContract attribute
  

  [ServiceContract (Namespace=http://.......)]
  Public interface Icalc
  {
     [OperationContract]
     Int add(int n1,int n2);
     [OperationContract]
     Int Sub(int n1,int n2);
  }

• Create an another class which implements the interface
  

  public class cal_op:ICalc
  {
     public int add(int a,int b)
     {
        return(a+b);
     }
     public int sub(int a,int b)
     {
        return(a-b);
     }
  }

In main program

• Config. The address
  

  Uri baseaddress=new uri(http://…..”);

• Create a service host
  

  ServiceHost selfhost=new ServiceHost(typeof(class_name),<object of uri >);
  ServiceHost selfhost=new ServiceHost(typeof(cal_op),baseAddress);

• Add service end point
  

  Selfhost.AddServiceEndPoint(typeof(<interface name>),new WSHttpBinding(),”<service name>”);
  Selfhost.AddServiceEndPoint(typeof(Icalc),new WSHttpBinding(),”calc_server”);

• Hosting with Metadata
  

  ServiceMetadataBehavior smb=new ServiceMetadataBehavior();
  Smb.HttpGetEnabled=true;
  Selfhost.Description.Behaviors.Add(smb);

• Then open the host
  

  <host_name>.open();
  Selfhost.Open();
  
  …
  …
  Selfhost.Close();

In VS2008 CMD

Svcutill.exe/language:cs/out:<filename.cs>/config http://……
Svcutill.exe/language:cs/out:client.cs>/config http://……

Add that file to client solution.

Client side

Create an end point by using tat obj:

<servicename> obj=new <servicename>();
Console.WriteLine(“{0}”,obj.Add(10,5));