WCF Services : Simplest way to create a WCF REST(Representational State Transfer) service.

Goal

To create a WCF REST(Representational State Transfer) service. The main goal is to show it in the most simplest way.

Follow the below given steps

1. Open Visual Studio 2010.
2. File >> New Project >> WCF >> WCF Service Application. I named it SimpleWCFService.
3. I removed the default "IService1.cs" and "Service1.svc". Added a new "Sample.svc". This will automatically create an interface in file "ISample.cs". The structure will look like the image given below.

ISample.cs

#region System
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Web;
#endregion

namespace SimpleWCFService
{
    [ServiceContract]
    public interface ISample
    {
        /// <summary>
        /// The parameters are passed in URL expression.
        /// </summary>
        /// <param name="Param1"></param>
        /// <param name="Param2"></param>
        /// <returns></returns>
        [OperationContract]
        [WebGet(UriTemplate = "SampleCheck/{Param1}/{Param2}")]
        string SampleCheckUrl(string Param1, string Param2);

        /// <summary>
        /// The parameters are passed as QueryString.
        /// </summary>
        /// <param name="Param1">{Param1}</param>
        /// <param name="Param2">{Param2}</param>
        /// <returns></returns>
        [OperationContract]
        [WebGet(UriTemplate = "SampleCheck?Param1={Param1}&Param2={Param2}")]
        string SampleCheckQueryString(string Param1, string Param2);
    }
}

Sample.svc.cs

#region System
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Web.Script.Serialization;
#endregion

namespace SimpleWCFService
{

    /// <summary>
    /// Simple Class
    /// </summary>
    [DataContract]
    public class SimpleClass
    {
        [DataMember]
        public string CParam1 { get; set; }

        [DataMember]
        public string CParam2 { get; set; }

        [DataMember]
        public string CMessage { get; set; }
    }


    /// <summary>
    /// The simplest way to use a WCF REST(Representational State Transfer) service
    /// </summary>
    public class Sample : ISample
    {

        /// <summary>
        /// The parameters are passed in URL expression.
        /// </summary>
        /// <param name="Param1"></param>
        /// <param name="Param2"></param>
        /// <returns></returns>
        public string SampleCheckUrl(string Param1, string Param2)
        {
            JavaScriptSerializer _jScript = new JavaScriptSerializer();
            SimpleClass _simple = new SimpleClass()
            {
                CParam1 = Param1,
                CParam2 = Param2,
                CMessage = "Success with SampleCheckUrl(int Param1, string Param2)!"
            };
            return _jScript.Serialize(_simple);            
        }

        /// <summary>
        /// The parameters are passed as QueryString.
        /// </summary>
        /// <param name="Param1"></param>
        /// <param name="Param2"></param>
        /// <returns></returns>
        public string SampleCheckQueryString(string Param1, string Param2)
        {
            JavaScriptSerializer _jScript = new JavaScriptSerializer();
            SimpleClass _simple = new SimpleClass()
            {
                CParam1 = Param1,
                CParam2 = Param2,
                CMessage = "Success with SampleCheckQueryString(int Param1, string Param2)!"
            };
            return _jScript.Serialize(_simple);
        }
    }
}

Web.config - MOST IMPORTANT

<?xml version="1.0"?>
<configuration> 
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="SimpleWCFServiceBC">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="restBehaviour">
          <webHttp automaticFormatSelectionEnabled="true" helpEnabled="true"/>
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <bindings>
      <webHttpBinding>
        <binding name="RestBinding" />
      </webHttpBinding>
      <basicHttpBinding>

      </basicHttpBinding>
    </bindings>
    <services>
      <service name="SimpleWCFService.Sample" behaviorConfiguration="SimpleWCFServiceBC">
        <endpoint address="" binding="basicHttpBinding" contract="SimpleWCFService.ISample"></endpoint>
        <endpoint address="rest" binding="webHttpBinding" behaviorConfiguration="restBehaviour" bindingConfiguration="RestBinding" contract="SimpleWCFService.ISample"></endpoint>
        <endpoint contract="IMetadataExchange" binding="mexHttpBinding" address="mex" />
      </service>
    </services>
  </system.serviceModel>

  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>

Checking REST Service - URL FORMAT

Navigate to the below given url(Note:Replace the port number.).
"http://{LOCALHOST:PORTNUMBER}/Sample.svc/rest/SampleCheck/Args1/Args2".
This should give the result in below given format.

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">{"CParam1":"Args1","CParam2":"Args2","CMessage":"Success with SampleCheckUrl(int Param1, string Param2)!"}</string> 

Checking REST Service - QueryString

Navigate to the below given url(Note:Replace the port number.).
"http://{LOCALHOST:PORTNUMBER/Sample.svc/rest/SampleCheck?Param1=Args1&Param2=Args2".
This should give the result in below given format.

<string xmlns="http://schemas.microsoft.com/2003/10/Serialization/">{"CParam1":"Args1","CParam2":"Args2","CMessage":"Success with SampleCheckQueryString(int Param1, string Param2)!"}</string> 

I spent a lot of time trying to figure this out so writing this up for the ones who just want solutions. Let me know if this helped.