ASP.NET Core

dotnet new mvc -o {AppName}
cd {AppName}
dotnet new gitignore

namespace MvcMovie.Controllers;

public class HomeController : Controller
{
    // ...
    public IActionResult Index()
    {
        return View();
    }
    public IActionResult Privacy()
    {
        return View();
    }
    // ...
}

@{
    ViewData["Title"] = "Home Page";
}

<div class="text-center">
    <h1 class="display-4">Welcome</h1>
    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
</div>

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning",
      "Microsoft.EntityFrameworkCore.Database.Command": "Information"
    }
  }
}

var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllersWithViews();
var app = builder.Build();
// ...
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

using Microsoft.AspNetCore.Mvc;

namespace MvcMovie.Controllers;

public class HelloController : ControllerBase
{
    // GET: /Hello/
    public string Index()
    {
        return "Hello World!";
    }
}

using System.Text.Encodings.Web;
// ...
public class HelloController : ControllerBase
{
    // ...
    // GET: /Hello/Welcome/ 
    public string Welcome(string name, int numTimes = 1)
    {
        // Prevents injection attacks
        return HtmlEncoder.Default.Encode($"Hello {name}, NumTimes is: {numTimes}");
    }
}

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": ".NET Core Launch (web)",
      # ...
      "env": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      # ...
    }
  ]
}

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Home/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}
else
{
    app.UseDeveloperExceptionPage();
}

using System.ComponentModel.DataAnnotations;

namespace MvcMovie.Models;

public class Movie
{
    public int Id { get; set; }

    [StringLength(100, MinimumLength = 3)]
    public string Title { get; set; } = null!;

    [Display(Name = "Release Date"), DataType(DataType.Date)]
    public DateTime ReleaseDate { get; set; }

    [StringLength(30)]
    public string Genre { get; set; } = null!;
}

using Microsoft.EntityFrameworkCore;
using MvcMovie.Models;

namespace MvcMovie.Data;

public class MvcMovieContext : DbContext
{
    public DbSet<Movie> Movies { get; set; } = null!;
    public string DbPath { get; private set; }

    public MvcMovieContext()
    {
        // Path to SQLite database file
        DbPath = "MvcMovie.db";
    }

    // The following configures EF to create a SQLite database file locally
    protected override void OnConfiguring(DbContextOptionsBuilder options)
    {
        // Use SQLite as database
        options.UseSqlite($"Data Source={DbPath}");
        // Optional: log SQL queries to console
        options.LogTo(Console.WriteLine, new[] { DbLoggerCategory.Database.Command.Name }, LogLevel.Information);
    }
}

# Create a new migration
dotnet ef migrations add {MigratioName}

# Sync DB with most recent migrations
dotnet ef database update

// ...
using MvcMovie.Data;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
// Attach an EF Core database context to each query
builder.Services.AddDbContext<MvcMovieContext>();
// ...

# Ignore SQLite temp files
*.db-shm
*.db-wal
# ...

using MvcMovie.Data;

namespace MvcMovie.Models;

public class SeedData
{
    public static void Init()
    {
        using (var context = new MvcMovieContext())
        {
            // Look for existing content
            if (context.Movies.Any())
            {
                return;   // DB already filled
            }

            // Add several movies
            context.Movies.AddRange(
                new Movie
                {
                    Title = "When Harry Met Sally",
                    ReleaseDate = DateTime.Parse("1989-2-12"),
                    Genre = "Romantic Comedy",
                },
                // ...
                new Movie
                {
                    Title = "Rio Bravo",
                    ReleaseDate = DateTime.Parse("1959-4-15"),
                    Genre = "Western"
                }
            );

            // Commit changes into DB
            context.SaveChanges();
        }
    }
}

using MvcMovie.Data;
using MvcMovie.Models;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddControllersWithViews();
// Attach an EF Core database context to each query
builder.Services.AddDbContext<MvcMovieContext>();

var app = builder.Build();

// Seed data into DB
SeedData.Init();
// ...

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

[Route("api/[controller]")]
[ApiController]
public class MovieApiController : ControllerBase
{
    private readonly MvcMovieContext _context;

    public MovieApiController(MvcMovieContext context)
    {
        _context = context;
    }

    // GET: api/MovieApi
    public async Task<ActionResult<IEnumerable<Movie>>> GetMovies()
    {
        return await _context.Movies.ToListAsync();
    }
}

// ...
[Route("api/[controller]")]
[ApiController]
public class MovieApiController : ControllerBase
{
    // ...
    // GET: api/MovieApi/5
    [HttpGet("{id}")]
    public async Task<ActionResult<Movie>> GetMovie(int id)
    {
        var movie = await _context.Movies.FindAsync(id);
        if (movie == null)
            return NotFound();
        return movie;
    }
}

using System.Text.Json.Serialization;
// ...

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
// Ignore circular references when serializing objects into JSON
builder.Services.AddControllersWithViews().AddJsonOptions(x =>
    x.JsonSerializerOptions.ReferenceHandler = ReferenceHandler.IgnoreCycles);
// ...

// ...
[Route("api/[controller]")]
[ApiController]
public class MovieApiController : ControllerBase
{
    // ...
    // POST: api/MovieApi
    // To protect from overposting attacks, see https://go.microsoft.com/fwlink/?linkid=2123754
    [HttpPost]
    public async Task<ActionResult<Movie>> PostMovie(Movie movie)
    {
        _context.Movies.Add(movie);
        await _context.SaveChangesAsync();

        return CreatedAtAction(nameof(GetMovie), new { id = movie.Id }, movie);
    }
}

curl -X POST -k -H 'Content-Type: application/json' -i https://localhost:{port}/api/movieapi/ --data '{
    "Title": "1941",
    "ReleaseDate": "1979-12-14T00:00:00",
    "Genre": "Comedy"
}'

// ...
[Route("api/[controller]")]
[ApiController]
public class MovieApiController : ControllerBase
{
    // ...
    // PUT: api/MovieApi/5
    // To protect from overposting attacks, see https://go.microsoft.com/fwlink/?linkid=2123754
    [HttpPut("{id}")]
    public async Task<IActionResult> PutMovie(int id, Movie movie)
    {
        if (id != movie.Id)
            return BadRequest();

        _context.Entry(movie).State = EntityState.Modified;
        try
        {
            await _context.SaveChangesAsync();
        }
        catch (DbUpdateConcurrencyException)
        {
            if (!MovieExists(id))
                return NotFound();
            else
                throw;
        }
        return NoContent();
    }

    // Returns true if a movie with specified id already exists
    private bool MovieExists(int id)
    {
        return _context.Movies.Any(m => m.Id == id);
    }
}

curl -X PUT -k -H 'Content-Type: application/json' -i https://localhost:7294/api/movieapi/5 --data '{
    "Id": 5,
    "Title": "1941 (movie)",
    "ReleaseDate": "1979-12-14T00:00:00",
    "Genre": "Comedy"
}'

// ...
[Route("api/[controller]")]
[ApiController]
public class MovieApiController : ControllerBase
{
    // ...
    // DELETE: api/MovieApi/5
    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteMovie(int id)
    {
        var movie = await _context.Movies.FindAsync(id);
        if (movie == null)
            return NotFound();

        _context.Movies.Remove(movie);
        await _context.SaveChangesAsync();

        return NoContent();
    }
    // ...

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>@ViewData["Title"] - Movie App</title>
    <!-- ... -->
  </head>
  <body>
    <header><!-- ... --></header>
    <div class="container">
      <main role="main" class="pb-3">@RenderBody()</main>
    </div>
    <footer><!-- ... --></footer>
    <script src="~/lib/jquery/dist/jquery.min.js"></script>
    <!-- ... -->
    @await RenderSectionAsync("Scripts", required: false)
  </body>
</html>

using Microsoft.AspNetCore.Mvc;

namespace MvcMovie.Controllers;

public class HelloController : Controller // not ControllerBase!
{
    // 
    // GET: /Hello/
    public IActionResult Index()
    {
        // Renders Views/Hello/Index.cshtml
        return View();
    }
    // ...
}

@*
    This view demonstrates some possibilities of the Razor syntax.
    (This is a server-side comment, by the way).
*@

<h2>Hello ASP.NET Core MVC!</h2>

@{
    @* Some info about a famous monument. *@
    string monument = "Eiffel Tower";
    int year = 1889;
}

<p>The @monument was inaugurated in @year. It is @(DateTime.Now.Year - year) years old!</p>

@{
    string[] colors = { "blue", "brown", "black" };
}
@if (colors.Length > 0)
{
    <p>A few colors:</p>
    <ul>
    @foreach (string color in colors)
        {
            <li>Color: @color</li>
        }
    </ul>
}

<p>
    @{
        void RenderStrong(string value)
        {
            <strong>@value</strong>
        }

        int count = 5;
        while (count > 0)
        {
            <text>@count... </text>
            count--;
        }
        RenderStrong("BOOM!");
    }
</p>

@{
    string visitorName = "Garance";
}
<p>
    Here's an <a href="https://fr.wikipedia.org/wiki/Tour_Eiffel">external link</a>,
    a <a asp-controller="Home" asp-action="Index">link to the home page</a>
    and a <a asp-action="Welcome" asp-route-name="@visitorName" asp-route-numtimes="5">link with parameters</a>.
</p>

using Microsoft.AspNetCore.Mvc;

namespace MvcMovie.Controllers;

public class HelloController : Controller
{
    // ...
    // GET: /Hello/Welcome/ 
    public IActionResult Welcome(string name, int numTimes = 0)
    {
        ViewData["Message"] = "Hello " + name;
        ViewData["NumTimes"] = numTimes;
        return View();
    }
}

@{
    ViewData["Title"] = "Welcome";
    int numTimes = (int)ViewData["NumTimes"]!;
}

<h2>Welcome!</h2>
<ul>
    @for (int i = 0; i < numTimes; i++)
    {
        <li>@ViewData["Message"]</li>
    }
</ul>

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    private readonly MvcMovieContext _context;

    public MovieController(MvcMovieContext context)
    {
        _context = context;
    }

    // GET: Movie
    public async Task<IActionResult> Index()
    {
        var movies = await _context.Movies.OrderBy(m => m.Title).ToListAsync();
        return View(movies);
    }
}

@model IEnumerable<MvcMovie.Models.Movie>

@{
    ViewData["Title"] = "Movies";
}

<h2>Movies</h2>
<p>
    <a asp-action="Create">Create New</a>
</p>
<table class="table">
    <thead>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model.Title)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.ReleaseDate)
            </th>
            <th>
                @Html.DisplayNameFor(model => model.Genre)
            </th>
            <th></th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Title)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.ReleaseDate)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Genre)
                </td>
                <td>
                    <a asp-action="Edit" asp-route-id="@item.Id">Edit</a> |
                    <a asp-action="Details" asp-route-id="@item.Id">Details</a> |
                    <a asp-action="Delete" asp-route-id="@item.Id">Delete</a>
                </td>
            </tr>
        }
    </tbody>
</table>

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // GET: Movies/Details/5
    public async Task<IActionResult> Details(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var movie = await _context.Movies
            .FirstOrDefaultAsync(m => m.Id == id);
        if (movie == null)
        {
            return NotFound();
        }
        return View(movie);
    }
}

@model MvcMovie.Models.Movie

@{
    ViewData["Title"] = "Details";
}

<h2>@Html.DisplayFor(model => model.Title)</h2>
<div>
    <hr />
    <dl class="row">
        <dt class="col-sm-3">
            @Html.DisplayNameFor(model => model.ReleaseDate)
        </dt>
        <dd class="col-sm-9">
            @Html.DisplayFor(model => model.ReleaseDate)
        </dd>
        <dt class="col-sm-3">
            @Html.DisplayNameFor(model => model.Genre)
        </dt>
        <dd class="col-sm-9">
            @Html.DisplayFor(model => model.Genre)
        </dd>
    </dl>
</div>
<div>
    <a asp-action="Edit" asp-route-id="@Model.Id">Edit</a> |
    <a asp-action="Index">Back to List</a>
</div>

using System.ComponentModel.DataAnnotations;

namespace MvcMovie.Models;

public class Movie
{
    public int Id { get; set; }

    [StringLength(100, MinimumLength = 3)]
    public string Title { get; set; } = null!;

    [Display(Name = "Release Date"), DataType(DataType.Date)]
    public DateTime ReleaseDate { get; set; }

    [StringLength(30)]
    public string Genre { get; set; } = null!;
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // GET: Movie/Create
    public IActionResult Create()
    {
        return View();
    }
}

@model MvcMovie.Models.Movie

@{
    ViewData["Title"] = "Create";
}

<h2>Create a Movie</h2>
<hr />
<div class="row">
    <div class="col-md-4">
        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Title" class="control-label"></label>
                <input asp-for="Title" class="form-control" />
                <span asp-validation-for="Title" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="ReleaseDate" class="control-label"></label>
                <input asp-for="ReleaseDate" class="form-control" />
                <span asp-validation-for="ReleaseDate" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Genre" class="control-label"></label>
                <input asp-for="Genre" class="form-control" />
                <span asp-validation-for="Genre" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

<div>
    <a asp-action="Index">Back to List</a>
</div>

@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // POST: Movie/Create
    // To protect from overposting attacks, 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,Title,ReleaseDate,Genre")] Movie movie)
    {
        // Apply model validation rules
        if (ModelState.IsValid)
        {
            _context.Add(movie);
            await _context.SaveChangesAsync();
            return RedirectToAction(nameof(Index));
        }
        // At this point, something failed: redisplay form
        return View(movie);
    }
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // GET: Movies/Edit/5
    public async Task<IActionResult> Edit(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var movie = await _context.Movies.FindAsync(id);
        if (movie == null)
        {
            return NotFound();
        }
        return View(movie);
    }
}

@model MvcMovie.Models.Movie

@{
    ViewData["Title"] = "Edit";
}

<h2>Edit a Movie</h2>
<hr />
<div class="row">
    <div class="col-md-4">
        <form asp-action="Edit">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <input type="hidden" asp-for="Id" />
            <div class="form-group">
                <label asp-for="Title" class="control-label"></label>
                <input asp-for="Title" class="form-control" />
                <span asp-validation-for="Title" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="ReleaseDate" class="control-label"></label>
                <input asp-for="ReleaseDate" class="form-control" />
                <span asp-validation-for="ReleaseDate" class="text-danger"></span>
            </div>
            <div class="form-group">
                <label asp-for="Genre" class="control-label"></label>
                <input asp-for="Genre" class="form-control" />
                <span asp-validation-for="Genre" class="text-danger"></span>
            </div>
            <div class="form-group">
                <input type="submit" value="Save" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

<div>
    <a asp-action="Index">Back to List</a>
</div>

@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // POST: Movies/Edit/5
    // To protect from overposting attacks, 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,Title,ReleaseDate,Genre")] Movie movie)
    {
        if (id != movie.Id)
        {
            return NotFound();
        }

        if (ModelState.IsValid)
        {
            try
            {
                _context.Update(movie);
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!MovieExists(movie.Id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }
            return RedirectToAction(nameof(Index));
        }
        return View(movie);
    }

    private bool MovieExists(int id)
    {
        return _context.Movies.Any(e => e.Id == id);
    }
}

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // GET: Movies/Delete/5
    public async Task<IActionResult> Delete(int? id)
    {
        if (id == null)
        {
            return NotFound();
        }

        var movie = await _context.Movies
            .FirstOrDefaultAsync(m => m.Id == id);
        if (movie == null)
        {
            return NotFound();
        }

        return View(movie);
    }
}

@model MvcMovie.Models.Movie

@{
    ViewData["Title"] = "Delete";
}

<h2>Delete a Movie</h2>

<h4>Are you sure?</h4>
<div>
    <hr />
    <dl class="row">
        <dt class="col-sm-3">
            @Html.DisplayNameFor(model => model.Title)
        </dt>
        <dd class="col-sm-9">
            @Html.DisplayFor(model => model.Title)
        </dd>
        <dt class="col-sm-3">
            @Html.DisplayNameFor(model => model.ReleaseDate)
        </dt>
        <dd class="col-sm-9">
            @Html.DisplayFor(model => model.ReleaseDate)
        </dd>
        <dt class="col-sm-3">
            @Html.DisplayNameFor(model => model.Genre)
        </dt>
        <dd class="col-sm-9">
            @Html.DisplayFor(model => model.Genre)
        </dd>
        </dd>
    </dl>

    <form asp-action="Delete">
        <input type="hidden" asp-for="Id" />
        <input type="submit" value="Delete" class="btn btn-danger" /> |
        <a asp-action="Index">Back to List</a>
    </form>
</div>

using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using MvcMovie.Data;
using MvcMovie.Models;

namespace MvcMovie.Controllers;

public class MovieController : Controller
{
    // ...
    // POST: Movies/Delete/5
    [HttpPost, ActionName("Delete")]
    [ValidateAntiForgeryToken]
    public async Task<IActionResult> DeleteConfirmed(int id)
    {
        var movie = await _context.Movies.FindAsync(id);
        _context.Movies.Remove(movie!);
        await _context.SaveChangesAsync();
        return RedirectToAction(nameof(Index));
    }
}