ASP.NET MVC 5 – CRUD operations with Entity Framework 6 on Visual Studio 2013

아티클
1/17/2024

This demo focuses on using ASP.NET Scaffolding to generate controllers and views.

Introduction

Using MVC, Entity Framework, and ASP.NET Scaffolding, you can create a web application that provides an interface to an existing database table. This demo shows you how to automatically generate code that enables users to display, edit, create, and delete data that resides on the database. The generated code corresponds to the columns in the database table.

STEP 1 - Create new project on Visual Studio 2013

Open Visual Studio
Create new ASP.NET Web Application Project
Give a name to the project
- In this case I call it "MVC5" as I show in the follow image

http://code.msdn.microsoft.com/site/view/file/106306/1/MVC51.jpg

STEP 2 - Create class Movies

Add new class to the project
- Note: This class represents a table, and the properties of the columns of that table
Give a name to that class
- In my sample I call it "MoviesModel"
On the class create the following code:

public class  Movie 
{ 
    public int  ID { get; set; } 
    public string  Title { get; set; } 
    public DateTime ReleaseDate { get; set; } 
    public string  Genre { get; set; } 
    public decimal  Price { get; set; } 
} 
  
public class  MovieDBContext : DbContext 
{ 
    public DbSet<Movie> Movies { get; set; } 
}

Put the class inside the Models folders, just to organize your code.

http://code.msdn.microsoft.com/site/view/file/106307/1/MVC52.jpg

STEP 3 - Create controller with views using Entity Framework

Add new Scaffolded item to the project
- This is a new item which exists on MVC5

http://code.msdn.microsoft.com/site/view/file/106308/1/MVC53.jpg

Choose option MVC5 Controller with views using Entity Framework

http://code.msdn.microsoft.com/site/view/file/106309/1/MVC54.jpg

Click Add
- Note: If you receive an error, it may be because you did not build the project in the previous section. If so, try building the project, and then add the scaffolded item again.

After the code generation process is complete, you will see a new controller and views in your project.

STEP 4 - Controller and Views Generation

a. The Controller was automatically created with CRUD operations

using System; 
using System.Collections.Generic; 
using System.Data; 
using System.Data.Entity; 
using System.Linq; 
using System.Net; 
using System.Web; 
using System.Web.Mvc; 
using MVC5.Models; 
  
namespace MVC5 
{ 
    public class  MoviesController : Controller 
    { 
        private MovieDBContext db = new MovieDBContext(); 
  
        // GET: /Movies/ 
        public ActionResult Index() 
        { 
            return View(db.Movies.ToList()); 
        } 
  
        // GET: /Movies/Details/5 
        public ActionResult Details(int? id) 
        { 
            if (id == null) 
            { 
                return new  HttpStatusCodeResult(HttpStatusCode.BadRequest); 
            } 
            Movie movie = db.Movies.Find(id); 
            if (movie == null) 
            { 
                return HttpNotFound(); 
            } 
            return View(movie); 
        } 
  
        // GET: /Movies/Create 
        public ActionResult Create() 
        { 
            return View(); 
        } 
  
        // POST: /Movies/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 ActionResult Create([Bind(Include="ID,Title,ReleaseDate,Genre,Price")] Movie movie) 
        { 
            if (ModelState.IsValid) 
            { 
                db.Movies.Add(movie); 
                db.SaveChanges(); 
                return RedirectToAction("Index"); 
            } 
  
            return View(movie); 
        } 
  
        // GET: /Movies/Edit/5 
        public ActionResult Edit(int? id) 
        { 
            if (id == null) 
            { 
                return new  HttpStatusCodeResult(HttpStatusCode.BadRequest); 
            } 
            Movie movie = db.Movies.Find(id); 
            if (movie == null) 
            { 
                return HttpNotFound(); 
            } 
            return View(movie); 
        } 
  
        // POST: /Movies/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 ActionResult Edit([Bind(Include="ID,Title,ReleaseDate,Genre,Price")] Movie movie) 
        { 
            if (ModelState.IsValid) 
            { 
                db.Entry(movie).State = EntityState.Modified; 
                db.SaveChanges(); 
                return RedirectToAction("Index"); 
            } 
            return View(movie); 
        } 
  
        // GET: /Movies/Delete/5 
        public ActionResult Delete(int? id) 
        { 
            if (id == null) 
            { 
                return new  HttpStatusCodeResult(HttpStatusCode.BadRequest); 
            } 
            Movie movie = db.Movies.Find(id); 
            if (movie == null) 
            { 
                return HttpNotFound(); 
            } 
            return View(movie); 
        } 
  
        // POST: /Movies/Delete/5 
        [HttpPost, ActionName("Delete")] 
        [ValidateAntiForgeryToken] 
        public ActionResult DeleteConfirmed(int id) 
        { 
            Movie movie = db.Movies.Find(id); 
            db.Movies.Remove(movie); 
            db.SaveChanges(); 
            return RedirectToAction("Index"); 
        } 
  
        protected override  void Dispose(bool disposing) 
        { 
            if (disposing) 
            { 
                db.Dispose(); 
            } 
            base.Dispose(disposing); 
        } 
    } 
}