using System.Threading.Tasks;

using Core.Web.Models;

using Microsoft.AspNetCore.Mvc;

using Microsoft.EntityFrameworkCore;

namespace Core.Web.Controllers

{

    public class RegionController : Controller

    {

        private readonly DataContext _dataContext;

        public RegionController(DataContext dataContext)

        {

            _dataContext = dataContext;

        }

        //非跟踪查询

        public async Task<IActionResult> Index()

        {

            var regions = await _dataContext.Region.AsNoTracking().ToListAsync();

            return View(regions);

        }

        //非跟踪增加

        public async Task<bool> Add(Region region)

        {

            region.RegionID = 11;

            region.RegionDescription = "青岛";

            _dataContext.Entry(region).State = EntityState.Added;

            int res = await _dataContext.SaveChangesAsync();

            return res > 0;

        }

        //非跟踪修改

        public async Task<bool> Edit(Region region)

        {

            region.RegionID = 11;

            region.RegionDescription = "菏泽";

            _dataContext.Entry(region).State = EntityState.Modified;

            int res = await _dataContext.SaveChangesAsync();

            return res > 0;

        }

        //非跟踪删除

        public async Task<bool> Del(Region region)

        {

            region.RegionID = 11;

            _dataContext.Entry(region).State = EntityState.Deleted;

            int res = await _dataContext.SaveChangesAsync();

            return res > 0;

        }

    }

}