1.WEB,API -> connection string appsettings.json
############################################################
2.DataModel - Client.cs
using System.ComponentModel.DataAnnotations;

namespace Kolokwium.Model.DataModels;


public class Car{

    [Key]
    public string VinId{get;set;}=null!;
    public string Vendor{get;set;}=null!;
    public string Brand{get;set;}=null!;
    public string Type{get;set;}=null!;
    public int Capacity{get;set;}
    public DateTime ProductionDate{get;set;}
    public ICollection<Driver> Drivers{get;set;}=null!;

}
--------------------------------------------------------
using System.ComponentModel.DataAnnotations;
namespace Kolokwium.Model.DataModels;


public class Driver{
    [Key]
    public int LicenseNumerId{get;set;}
    public string FirstName{get;set;}=null!;
    public string LastName{get;set;}=null!;
    public string Address{get;set;}=null!;
    public ICollection<Car> Cars{get;set;}=null!;

}
#############################################################
3.VM - ClientVm.cs
using System.ComponentModel.DataAnnotations;
using Kolokwium.Model.DataModels;

namespace Kolokwium.ViewModel.VM;
public class CarVm
{  
    [Key]
    public string? VinId{get;set;}
    public string Vendor{get;set;}=null!;
    public string Brand{get;set;}=null!;
    public string Type{get;set;}=null!;
    public int Capacity{get;set;}
    public DateTime ProductionDate{get;set;}
    public ICollection<DriverVm> Drivers{get;set;}=null!;
}
--------------------------------------------------------
VM - ModifyClientVm.cs
using System.ComponentModel.DataAnnotations;

namespace Kolokwium.ViewModel.VM;
public class ModifyCarVm
{
    [Key]
    public string? VinId{get;set;}
    public string Vendor{get;set;}=null!;
    public string Brand{get;set;}=null!;
    public string Type{get;set;}=null!;
    public int Capacity{get;set;}
    public DateTime ProductionDate{get;set;}
}
#############################################################
4.Services ->tworzymy folder Interfaces - IStudentService.cs
using System.Linq.Expressions;
using Kolokwium.Model.DataModels;
using Kolokwium.ViewModel.VM;

namespace Kolokwium.Services.Interfaces;
public interface ICarService
{
    IEnumerable<CarVm> GetCarVms(Expression<Func<Car,bool>>? predicate = null);
    CarVm GetCarVm(Expression<Func<Car,bool>> predicate);
    Car Modify(ModifyCarVm ModifyCarVm);
    void DeleteCar(string id);
}
##############################################################
5.ConcreteServices -> StudentService.cs
using System.Linq.Expressions;
using System.Security.Cryptography.X509Certificates;
using AutoMapper;
using Kolokwium.DAL;
using Kolokwium.Model.DataModels;
using Kolokwium.Services.Interfaces;
using Kolokwium.ViewModel.VM;
using Microsoft.EntityFrameworkCore.Diagnostics;
using Microsoft.Extensions.Logging;

namespace Kolokwium.Services.ConcreteServices;
public class CarService : BaseService, ICarService
{
    public CarService(ApplicationDbContext dbContext, IMapper mapper, ILogger logger) : base(dbContext, mapper, logger)
    {
    }

    public Car Modify(ModifyCarVm ModifyCarVm)
    {
        try
        {
            if(ModifyCarVm == null)
                throw new Exception("Error");
            var Car = Mapper.Map<Car>(ModifyCarVm);
            if(!string.IsNullOrEmpty(ModifyCarVm.VinId))
            {
                DbContext.Cars.Add(Car);
                DbContext.SaveChanges();
                return Car;
            }
            else
            {
                var oldCar = DbContext.Cars.Find(ModifyCarVm.VinId);
                if(oldCar == null)
                    throw new Exception();
                oldCar.VinId = Car.VinId;
                oldCar.Vendor = Car.Vendor;
                oldCar.Brand = Car.Brand;
                oldCar.Type = Car.Type;
                oldCar.Capacity = Car.Capacity;
                DbContext.SaveChanges();
                return oldCar;
            }
        }
        catch(Exception e)
        {
            Logger.LogError(e,e.Message);
            throw;
        }
    }

    public void DeleteCar(string id)
    {
        try
        {
            var Car = DbContext.Cars.FirstOrDefault(x => x.VinId == id);
            if(Car == null)
                throw new Exception();
            DbContext.Cars.Remove(Car);
            DbContext.SaveChanges();
        }
        catch(Exception e)
        {
            Logger.LogError(e,e.Message);
        }
    }

    public CarVm GetCarVm(Expression<Func<Car, bool>> predicate)
    {
        try
        {
            if(predicate == null)
                throw new Exception();
            var Car = DbContext.Cars.FirstOrDefault(predicate);
            if(Car == null)
                throw new Exception();
            var CarVm = Mapper.Map<CarVm>(Car);
            return CarVm;
        }
        catch(Exception e)
        {
            Logger.LogError(e,e.Message);
            throw;
        }
    }

    public IEnumerable<CarVm> GetCarVms(Expression<Func<Car, bool>>? predicate = null)
    {
        try
        {
            var Cars = DbContext.Cars.AsQueryable();
            if(predicate != null)
            {
                Cars.Where(predicate);
            }
            var CarsVm = Mapper.Map<IEnumerable<CarVm>>(Cars);
            return CarsVm;
        }
        catch(Exception e)
        {
            Logger.LogError(e,e.Message);
            throw;
        }
    }
}
#########################################################################################################
6.Configuration -> MainProfile.cs //ZRÓB USINGI ctrl .//*2
CreateMap<Student,StudentVm>();
CreateMap<ModifyStudentVm,Student>();
CreateMap<StudentVm,ModifyStudentVm>();
###########################################################################################
7.Web -> Controllers -> StudentController.cs
using AutoMapper;
using Kolokwium.Model.DataModels;
using Kolokwium.Services.ConcreteServices;
using Kolokwium.Services.Interfaces;
using Kolokwium.ViewModel.VM;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Localization;

namespace Kolokwium.Web.Controllers;
public class CarController : BaseController
{
    private readonly ICarService CarService1;
    public CarController(ILogger logger, IMapper mapper, IStringLocalizer localizer, ICarService CarService) : base(logger, mapper, localizer)
    {
        CarService1 = CarService;
    }

    public IActionResult Index()
    {
        var CarsVm = CarService1.GetCarVms();
        return View(CarsVm);
    }

    public IActionResult Modify(string? id = null)
    {
        if(id == null)
            return View();
        else
        {
            var Car = CarService1.GetCarVm(x => x.VinId == id);
            var ModifyCarVm = Mapper.Map<ModifyCarVm>(Car);
            return View(ModifyCarVm);
        }
    }

    [HttpPost]
    public IActionResult Modify(ModifyCarVm ModifyCarVm)
    {
        if(ModifyCarVm == null)
            throw new Exception();
        CarService1.Modify(ModifyCarVm);
        return RedirectToAction(nameof(Index));
    }

    public IActionResult DeleteCar(string id)
    {
        CarService1.DeleteCar(id);
        return RedirectToAction(nameof(Index));
    }
}
#####################################################################
8.Web -> Program.cs//*2
builder.Services.AddTransient<IStudentService,StudentService>();
#####################################################################
9.dotnet aspnet-codegenerator view -p Kolokwium.Web Index List -m StudentVm -outDir Views/Student -scripts -udl
########################################################################
10.Shared -> Layout
  <li class="nav-item">
     <a class="nav-link text-dark" asp-area="" asp-controller="Sportowiec" asp-action="Index">Sportowcy</a>
  </li>
###########################################################################
11.DAL -> DbContext//*3
public virtual DbSet<Student> Students {get; set;} = null!;
##########################################################################
12.dotnet aspnet-codegenerator view -p Kolokwium.Web Modify Create -m ModifyStudentVm -outDir 
Views/Student -scripts -udl                       //Wpisuj ręcznie lepiej xddd
###########################################################################
13.Web -> Views -> Index
Wywal Details
Zmienić akcje
@Html.ActionLink("Edit", "Modify", new {id = item.Id}) |
@Html.ActionLink("Delete", "DeleteSportowiec", new {id = item.Id})

W 10 linii zmień Create na Modify xdddd
#########################################################################
14.Usunąć ID z Modify.cshtml

Dodaj na poczatku w @:  var clients=ViewBag.Clients;
potem zamien diva z ClientId

            <div class="form-group">
                <label asp-for="ClientId" class="control-label"></label>
                <select asp-for="ClientId" class="form-control">
                    @foreach(var c in clients){
                        <option value="@c.Id">@c.FirstName</option>
                    }
                </select>
            </div>

#############################################################################
Polecenia:

1.  dotnet ef migrations add migrancja1 --project Kolokwium.DAL --startup-project Kolokwium.Web
2.  dotnet ef database update --project Kolokwium.DAL --startup-project Kolokwium.Web
2*3.  dotnet aspnet-codegenerator view -p Kolokwium.Web Index List -m StudentVm -outDir Views/Student -scripts -udl
2*4.  dotnet aspnet-codegenerator view -p Kolokwium.Web Modify Create -m ModifyStudentVm -outDir Views/Student -scripts -udl
5.  dotnet run --project Kolokwium.Web