Consuming Wcf Service

1.  First thing to consume a service is to create proxy.
2.  Proxy is a class which client should prepare in client language based on service information.
3. W3 standards for describing service information in WSDL[Webservice Description Language]

 We can create two types of Proxy’s:

1. On-fly Proxy.

2. Strong (or) design time proxy.

Normally code in client is written based on proxy.

1. On-fly Proxy: On-fly proxy means Proxy created @ runtime only. It is not user-friendly but provides dynamic processing advantages.
2. Design time proxy: Proxy is created first and code is written based on proxy. These are more friendly & more preferred also for regular service consumption.

As a wcf developer and consumer we have to handle these two tasks.i.e, Creating bindings according to requirement and creating proxy based on app properly.One proxy is created for single endpoint.

• Previous we Developed one Service Called WCFDEMO. Now we consume that WCFDEMO service at client Side.
• Ensure that WCFDEMO service is Running.

Consuming WCF Service example:

• ChannelFactory<t> class is used to create On-Fly proxy.It is present in same System.ServiceModel namespace.

Steps for Consuming WCF Service :

• Start another Microsoft  VisualStudio instance sothat we can write client program here and comminicate with running wcf service.

                    File-->new Project-->ConsoleApplication[Named As YMsgr]

• Copy (or) Get the interface created in service to our client project [WCFDEMO]  sothat we can use ChannelFactory class for creating proxy.
• Write code in Main,which is starting point.Code to use ChannelFactory and create On-Fly proxy class then start requesting .

     using System;

     using System.Collections.Generic;

     using System.Linq;

     using System.Text;

     using System.ServiceModel;//add reference

    namespace YMsgr

    {

       [ServiceContract]

       interface IDemo

       {

       [OperationContract]

        string Msg();

        string Add();

    }

     

   public class Program

    {

        static void Main(string[] args)

        {

            ChannelFactory<IDemo> obj = new ChannelFactory<IDemo>(new       BasicHttpBinding(),new EndpointAddress("http://localhost:5990/sudhakarservice")));

            IDemo Proxyobj = obj.CreateChannel();//CreatesProxy

            string msg = Proxyobj.Msg();

            Console.WriteLine("Result:"+msg);

            Console.ReadKey();

         }

      }

   }

ScreenShots For Above Program:

1. File-->new Project-->ConsoleApplication[Named As YMsgr]

    2.Add Reference System.ServiceModel for create >net enabled Program to Wcf                 enabled Program