ASP.NET: Web service type implementation to return JSON

NavRequestHandler.ashx

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Script.Serialization;

namespace TestingWebApp
{
    /// <summary>
    /// Summary description for ServiceHandler
    /// </summary>
    public class ServiceHandler : IHttpHandler
    {
        //key to access this webapi.
        private const string ApiKey = "ApiKeyForTesting";
       
        //private const string _chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        // string jsonResult = @"{ 'status': 1,'response':[]}";     
        

           


        public void ProcessRequest(HttpContext context)
        {
            //provide return type of request
            context.Response.ContentType = "application/json; charset=utf-8"; //"text/xml; charset=utf-8";
          
            try
            {
                string appkey = context.Request.QueryString["api"];
                string task = context.Request.QueryString["task"];
                if (appkey!=ApiKey)
                {
                    var res = new Result() { Status = 1, Response = "Invalid Request" };

                    var json = new JavaScriptSerializer();

                    context.Response.Write(json.Serialize(res));
                    return;
                }

                else
                {
                    JObject job = new JObject();
                    //job.Property("status").Value = 1;
                    int statuscode = 0;
                    
                    
                    //JArray item = (JArray)job["response"];
                       string jsons="";

                       if (task == "GetName")
                       {
                           //get context pass it into method to generate json, paramters can be fetch using context
                           jsons = AuthorJson(context, ref statuscode);

                           if (statuscode == 1)
                           {
                               //parsing json to create json object i.e. string to json object
                               JObject jobj = JObject.Parse(jsons);
                               job.Add("response", jobj);

                           }
                           else {
                               job.Add("response", jsons);
                           }
                          
                       }

                       else if (task=="Hello")
                       {
                           statuscode = 1;
                           jsons = "Hello World";
                           job.Add("response", jsons);
                       }

                       else {
                           jsons = "Invalid Command";
                           job.Add("response", jsons);
                       }

                   
                    job.Add("status", statuscode);               

                    context.Response.Write(job);
                    return;
                }


            }
            catch 
            {
                var res = new Result() { Status = 1, Response="Invalid Request"};

                var json = new JavaScriptSerializer();

                context.Response.Write(json.Serialize(res));
                return;
            }

            
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }


        //Define Business Logic Here...

        private string AuthorJson(HttpContext context,ref int statuscode)
        {
            string json = "";
            //get Parameters from body post
            var FirstName = context.Request["FirstName"];
            var LastName = context.Request["LastName"];

            if ((FirstName != null) && (LastName != null))
            {
                var author = new Author() { FirstName = FirstName,LastName=LastName };

                List<Author> authors = new List<Author>();
                authors.Add(author);
                //genereate your response body here.... complext body can be created here..
                json = @"{ 'Author': " + JsonConvert.SerializeObject(author, Formatting.Indented) +
                    ",'AuthorsList':" + JsonConvert.SerializeObject(authors, Formatting.Indented) +                    
                    "}";
                statuscode = 1;
               
            }
            else
            {
                json = "Invalid Parameters";
                statuscode = 2;
            
            }
                        
            return json;
        }


    }

    public class Author
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
    
    }

    public class Result {
        public int Status { get; set; }
        public string Response { get; set; }
    }
}