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using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Web.Mvc;
using System.Xml;
using System.Collections;
using Step2GenMVC_Task_1.Models;
using System.Diagnostics;
using System.Xml.Serialization;
using System.Web.Configuration;
using Step2GenMVC_Task_1.ViewModal;

namespace Step2GenMVC_Task_1.Controllers
{
public class LoginController : Controller
{

public static List<UserModel> listOfUsers;
static LoginController()
{

}

// GET: Login
[Route("login")]
[HttpPost]
public ActionResult Index(LoginDataModel obj)
{
string email = obj.UserName;
string password = obj.Password;
if (String.IsNullOrWhiteSpace(email) || String.IsNullOrWhiteSpace(password))
return Content("-1");
else
{
// Here we have non empty data and password
string path = Server.MapPath(WebConfigurationManager.AppSettings.Get("credentialsFile"));
StreamReader reader;
List<UserCredentialDataModel> listOfUsers;
UserCredentialsDataModel usersModel;
XmlSerializer deserialiser = new XmlSerializer(typeof(UserCredentialsDataModel));
reader = new StreamReader(path);
usersModel = (UserCredentialsDataModel)deserialiser.Deserialize(reader);
reader.Close();
listOfUsers = usersModel.User;
foreach(UserCredentialDataModel user in listOfUsers)
if (email == user.Email && password == user.Password)
{
//return Content(listOfUsers.Count.ToString());
return Content("Welcome/"+email);
//return RedirectToAction("Welcome");
}
}
return Content("-1");
}

[Route("welcome/{email}")]
public ActionResult Welcome(string email)
{
UserDataViewModel user = new UserDataViewModel() { Email = email };
return View(user);
//return RedirectToAction("json");
}

[Route("json")]
public ActionResult JsonObject()
{
// Newer Code
string path = Server.MapPath(WebConfigurationManager.AppSettings.Get("usersDataFile"));
StreamReader reader;
List<UserModel> listOfUsers;
List<UserModel> listOfUsersToBeSent = new List<UserModel>();
UsersModel usersModel;
XmlSerializer deserialiser = new XmlSerializer(typeof(UsersModel));
reader = new StreamReader(path);
usersModel = (UsersModel)deserialiser.Deserialize(reader);
reader.Close();
listOfUsers = usersModel.User;
LoginController.listOfUsers = usersModel.User;
// to filter the user with name starting with "A"
var query = from user in listOfUsers
where user.Name.StartsWith("A")
select user;
foreach(UserModel u in query)
{
listOfUsersToBeSent.Add(u);
}
return Json(listOfUsers, JsonRequestBehavior.AllowGet);
//return Json(listOfUsersToBeSent, JsonRequestBehavior.AllowGet);
//return Content("Json method");
}

[Route("innerJoin")]
public ActionResult JoinDemo()
{
string path = Server.MapPath(WebConfigurationManager.AppSettings.Get("cityDataFile"));
StreamReader reader;
List<UserModel> listOfUsers = LoginController.listOfUsers;
//return Content(listOfUsers.Count.ToString());
List<CityModel> listOfCities;
CitiesModel citiesModel;
XmlSerializer deserialiser = new XmlSerializer(typeof(CitiesModel));
reader = new StreamReader(path);
citiesModel = (CitiesModel)deserialiser.Deserialize(reader);
reader.Close();
listOfCities = citiesModel.City;
List<UserCityViewModel> userCityViews = new List<UserCityViewModel>();
var query = from user in listOfUsers
join city in listOfCities
on user.City equals city.Name
select new UserCityViewModel{Name = user.Name,Gender =user.Gender, Age = user.Age.ToString(),Email = user.Email,City = user.City,Pincode = city.Pincode};
foreach(var user in query)
{
userCityViews.Add(user);
}
//return Json(listOfCities,JsonRequestBehavior.AllowGet);
//return Content(LoginController.listOfUsers.Count.ToString() + " - " + listOfCities.Count.ToString());
return Json(userCityViews,JsonRequestBehavior.AllowGet);

}
}
} others. Click here ...