質問編集履歴

ソースコードの追加

2020/12/04 06:24

投稿

K-actus

スコア22

title CHANGED Viewed

File without changes

body CHANGED Viewed

@@ -27,8 +27,211 @@
 このとき、AnimalもしくはPlantのページで追加したデータや初期データをViewModelのページに反映させる、またLivingViewModelの方で編集したデータをAnimalもしくはPlantのページに反映させるControllerの書き方がわかりません。
+以下AnimalのControllerです。
+```C#
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.EntityFrameworkCore;
+using WebApplication.Data;
+using WebApplication.Models;
+namespace WebApplication.Controllers
+{
+    public class AnimalsController : Controller
+    {
+        private readonly MyDbContext _context;
+        public AnimalsController(MyDbContext context)
+        {
+            _context = context;
+        }
+        // GET: Animals
+        public async Task<IActionResult> Index()
+        {
+            return View(await _context.Animals.ToListAsync());
+        }
+        // GET: Animals/Details/5
+        public async Task<IActionResult> Details(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+            var Animal = await _context.Animals
+                .FirstOrDefaultAsync(m => m.Id == id);
+            if (Animal == null)
+            {
+                return NotFound();
+            }
+            return View(Animal);
+        }
+        // GET: Animals/Create
+        public IActionResult Create()
+        {
+            return View();
+        }
+        // POST: Animals/Create
+        // To protect from overposting attacks, please enable the specific properties you want to bind to, for
+        // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
+        [HttpPost]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> Create([Bind("Id,Name")] Animal Animal)
+        {
+            if (ModelState.IsValid)
+            {
+                _context.Add(Animal);
+                await _context.SaveChangesAsync();
+                return RedirectToAction(nameof(Index));
+            }
+            return View(Animal);
+        }
+        // GET: Animals/Edit/5
+        public async Task<IActionResult> Edit(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+            var Animal = await _context.Animals.FindAsync(id);
+            if (Animal == null)
+            {
+                return NotFound();
+            }
+            return View(Animal);
+        }
+        // POST: Animals/Edit/5
+        // To protect from overposting attacks, please enable the specific properties you want to bind to, for
+        // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
+        [HttpPost]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> Edit(int id, [Bind("Id,Name")] Animal Animal)
+        {
+            if (id != Animal.Id)
+            {
+                return NotFound();
+            }
+            if (ModelState.IsValid)
+            {
+                try
+                {
+                    _context.Update(Animal);
+                    await _context.SaveChangesAsync();
+                }
+                catch (DbUpdateConcurrencyException)
+                {
+                    if (!AnimalExists(Animal.Id))
+                    {
+                        return NotFound();
+                    }
+                    else
+                    {
+                        throw;
+                    }
+                }
+                return RedirectToAction(nameof(Index));
+            }
+            return View(Animal);
+        }
+        // GET: Animals/Delete/5
+        public async Task<IActionResult> Delete(int? id)
+        {
+            if (id == null)
+            {
+                return NotFound();
+            }
+            var Animal = await _context.Animals
+                .FirstOrDefaultAsync(m => m.Id == id);
+            if (Animal == null)
+            {
+                return NotFound();
+            }
+            return View(Animal);
+        }
+        // POST: Animals/Delete/5
+        [HttpPost, ActionName("Delete")]
+        [ValidateAntiForgeryToken]
+        public async Task<IActionResult> DeleteConfirmed(int id)
+        {
+            var Animal = await _context.Animals.FindAsync(id);
+            _context.Animals.Remove(Animal);
+            await _context.SaveChangesAsync();
+            return RedirectToAction(nameof(Index));
+        }
+        private bool AnimalExists(int id)
+        {
+            return _context.Animals.Any(e => e.Id == id);
+        }
+    }
+}
+```
 AnimalやPlantのデータとは関係なくLivingViewModelに初期データを追加することは出来るのですが、相互に作用できるようにしたいです。
+以下現在のViewModelのControllerです。
+```C#
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using WebApplication.Data;
+using WebApplication.Models;
+namespace WebApplication.Controllers
+{
+    public class LivingViewModelsController : Controller
+    {
+        public IActionResult Index()
+        {
+            LivingViewModel myView = new LivingViewModel();
+            myView.Animals = GetAnimals();
+            myView.Plants = GetPlants();
+            return View(myView);
+        }
+        private List<Animal> GetAnimals()
+        {
+            List<Animal> Animals = new List<Animal>();
+            Animals.Add(new Animal { /*初期データ*/ });
+            return Animals;
+        }
+        private List<Plant> GetPlants()
+        {
+            List<Plant> Plants = new List<Plant>();
+            Plants.Add(new Plant { /*初期データ*/ });
+            return Plants;
+        }
+    }
+}
+```
 DbContext、DbInitializerは以下の通りです。
 ```C#
 using System;