LearningMVC/HelperMethods/Controllers/PeopleController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using HelperMethods.Models;

namespace HelperMethods.Controllers
{
    public class PeopleController : Controller
    {
		private Person[] personData =
		{
			new Person {FirstName = "Adam", LastName = "Freeman", Role = Role.Admin},
			new Person {FirstName = "Jacqui", LastName = "Friffyth", Role = Role.User},
			new Person {FirstName = "John", LastName = "Smith", Role = Role.User},
			new Person {FirstName = "Anne", LastName = "Jones", Role = Role.Guest}
		};

		public ActionResult Index()
        {
            return View();
        }

		//public ActionResult GetPeople()
		//{
		//	return View(personData);
		//}

		//[HttpPost]
		//public ActionResult GetPeople(string selectedRole)
		//{
		//	if (selectedRole == null || selectedRole == "All")
		//	{
		//		return View(personData);
		//	}
		//	else
		//	{
		//		Role selected = (Role)Enum.Parse(typeof(Role), selectedRole);
		//		return View(personData.Where(p => p.Role == selected));
		//	}
		//}

		//private IEnumerable<Person> GetData(string selectedRole)
		//{
		//	IEnumerable<Person> data = personData;
		//	if (selectedRole != "All")
		//	{
		//		Role selected = (Role)Enum.Parse(typeof(Role), selectedRole);
		//		data = personData.Where(p => p.Role == selected);
		//	}
		//	return data;
		//}

		//public JsonResult GetPeopleDataJson(string selectedRole = "All")
		//{
		//	var data = GetData(selectedRole).Select(p => new
		//	{
		//		FirstName = p.FirstName,
		//		LastName = p.LastName,
		//		Role = Enum.GetName(typeof(Role), p.Role)
		//	});

		//	//IEnumerable<Person> data = GetData(selectedRole);
		//	return Json(data, JsonRequestBehavior.AllowGet);
		//}

		//public PartialViewResult GetPeopleData(string selectedRole = "All")
		//{
		//	return PartialView(GetData(selectedRole));
		//}

		public ActionResult GetPeopleData(string selectedRole = "All")
		{
			IEnumerable<Person> data = personData;
			if (selectedRole != "All")
			{
				Role selected = (Role)Enum.Parse(typeof(Role), selectedRole);
				data = personData.Where(p => p.Role == selected);
			}

			if (Request.IsAjaxRequest())
			{
				var formattedData = data.Select(p => new
				{
					FirstName = p.FirstName,
					LastName = p.LastName,
					Role = Enum.GetName(typeof(Role), p.Role)
				});
				return Json(formattedData, JsonRequestBehavior.AllowGet);
			}
			else
			{
				return PartialView(data);
			}
		}

		public ActionResult GetPeople(string selectedRole = "All")
		{
			return View((object)selectedRole);
		}
    }
}