everything/EveryThing/Pages/CodeTableVehicles/CreateEdit.cshtml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using EveryThing.Data;
using EveryThing.Models;
using EveryThing.Models.Vehicle;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using NuGet.Protocol.Plugins;
using DocumentFormat.OpenXml.Bibliography;
using Microsoft.EntityFrameworkCore;

namespace EveryThing.Pages.CodeTableVehicles
{
    [Authorize(Roles = "Administrator,TransportThingUser")]
    public class CreateEditModel : PageModel
    {
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;

        public CreateEditModel(ApplicationDbContext context, UserManager<IdentityApplicationUser> userManager)
        {
            _context = context;
            _userManager = userManager;
        }

        [BindProperty]
        public Vehicle Vehicle { get; set; }

        public async Task<IActionResult> OnGetAsync(bool edit, int? id)
        {
            var user = _userManager.GetUserAsync(User).Result;
            ViewData["Edit"] = edit;

            if (edit)
            {
                if (id == null)
                {
                    return NotFound();
                }

                Vehicle = await _context.Vehicles.FirstOrDefaultAsync(x => x.IdCompanyFk == user.IdCompanyFk 
                                                                           && x.IdVehicle == id);
                if (Vehicle == null)
                {
                    return NotFound();
                }
            }
            
            ViewData["VehicleType"] = new SelectList(_context.VehicleTypes
                .Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active), "IdVehicleType", "Title");

            ViewData["VehicleMake"] = new SelectList(_context.VehicleMakes
                .Where(x => x.IdCompanyFk == user.IdCompanyFk && x.Active), "IdVehicleMake", "Title");

            ViewData["FuelType"] = new SelectList(_context.VehicleFuelTypes
                .Where(x => x.IdCompanyFk == user.IdCompanyFk), "IdVehicleFuelType", "Title");

            ViewData["Department"] = new SelectList(_context.CodeTableDepartements
                .Where(x => x.IdCompanyFk == user.IdCompanyFk), "IdDepartement", "Title");


            return Page();
        }

        // To protect from over-posting attacks, see https://aka.ms/RazorPagesCRUD
        public async Task<IActionResult> OnPostAsync(bool edit)
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }

            if (edit)
            {
                _context.Attach(Vehicle).State = EntityState.Modified;
                try
                {
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!VehicleExists(Vehicle.IdVehicle))
                    {
                        return NotFound();
                    }
                    throw;
                }
            }
            else
            {
                //Add new
                _context.Vehicles.Add(Vehicle);
                await _context.SaveChangesAsync();
            }

            return RedirectToPage("./Index");
        }

        private bool VehicleExists(int id)
        {
            return _context.Vehicles.Any(e => e.IdVehicle == id);
        }
    }
}