Create JSONP WCF Service

• Open VS2012 , then Click New Project, Select  WCF Service library as  New Project  Template      (File --> New Project à WCF  --> WCF Service Library) and Change the Name and Solution name as “ClacLib” and “MyCalcultor”  

    

•      Open IService1.cs file and delete everything and paste this

            using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using System.Text;

namespace ClacLib

{

    [ServiceContract]

    public interface IService1

    {

        [OperationContract]

        string GetData(int value);

    }

}

• Add “System.ServiceModel.Web” as Reference to WCF Service Lib project.

•  Open Service1.cs file and delete everything  and paste this

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using System.ServiceModel.Activation;

using System.ServiceModel.Web;

using System.Text;

namespace ClacLib

{

[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]

   

    public class Service1 : IService1

    {

        [Description("Accepts LoginName and Get Employee By Login Name")]

        [WebGet(BodyStyle = WebMessageBodyStyle.Bare,

        RequestFormat = WebMessageFormat.Json,

        ResponseFormat = WebMessageFormat.Json,

     UriTemplate = " GetData?value={value}")]

        public string GetData(int value)

        {

            return string.Format("You entered: {0}", value);

        }

    }

}

Explanations:

WebGet – Get Method

Request Format and Response Format – accept and return data as JSON Objects

UriTemplate – PostFix of Service URL

• Modify App.config file

You can delete this file , since we separate the service part from hosting part. But Keep   it As it is. We want only Web.Config file. 

• Create new project under the same Solution and Select WCF Service Application as Project Template

• Delete IService1.cs file and delete the cs file. We don’t want those two files since we have separated Service part from hosting part.

•      Open Service1.svc file and delete ” CodeBehind="Service1.svc.cs"” part and Change the Service value

                                            Service Lib Project Name              Implemented Class Name

• Add Service lib as Ref to Service Host project

Then click “OK”.

• Modify the Web.config file

a.       Delete Service Model Section

b. Copy and paste below Section within that space as New Service Model

<system.serviceModel>

    <bindings>

      <webHttpBinding>

        <binding name="webHttpBindingWithJsonP" />

      </webHttpBinding>

    </bindings>

    <behaviors>

      <endpointBehaviors>

        <behavior name="webHttpBehavior">

          <webHttp helpEnabled="true" />

        </behavior>      

      </endpointBehaviors>

      <serviceBehaviors>

        <behavior>

          <serviceMetadata httpGetEnabled="true" />

          <serviceDebug includeExceptionDetailInFaults="true"/>

          <serviceThrottling maxConcurrentCalls="100" maxConcurrentSessions="1000" maxConcurrentInstances="1160"/>

          <dataContractSerializer maxItemsInObjectGraph="655360000"/>

        </behavior>

      </serviceBehaviors>

    </behaviors>

    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" />

    <services>

      <service name=" ClacLib.Service1">

        <endpoint address="Calc"

                  behaviorConfiguration="webHttpBehavior"

                  binding="webHttpBinding"

                  bindingConfiguration="webHttpBindingWithJsonP"

                  contract=" ClacLib.IService1"/>

      </service>

    </services>

  </system.serviceModel>

Explanations :

Services Tag –   Endpoint settings
Binding Tag -     Binding related Settings
Behaviors Tag - Behaviors related Settings

•  Debug the application by press F5 or Click “Run”. It will host your service in localhost and open it in default browser. Give the correct URL and check whether it s working or not.

          Or else Use this URL

          http://localhost:8733/Service1.svc/Calc/GetData?value=4

• Publish the Site and check again (How to Publish the Site ??? – Check here)

          I published the site in http://cd-ksurendran:8001

          So this is the Full URL http://cd-ksurendran:8001/Service1.svc/Calc/GetData?value={VALUE}

          Give some test values for {VALUE}

          Result of this URL look like this :

          If you don’t remember full URL  or want some help, Use this URL , it will display all  Operation Contract under specific Service Contract with some details

           http://cd-ksurendran:8001/Service1.svc/Calc/

Result of this URL look like this :