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What is the process for creating a Checkbox List using Entity Framework in ASP.Net core web api?

asked 2023-05-07 14:52:45 +0000

djk gravatar image

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answered 2023-05-07 15:10:02 +0000

bukephalos gravatar image

Here are the steps for creating a Checkbox List using Entity Framework in ASP.Net Core web API:

  1. Create a new ASP.Net Core web API project in Visual Studio.
  2. Create a model class for the Checkbox List items. For example, if you're creating a Checkbox List for Colors, you might have a model class like this:
public class Color
{
    public int Id { get; set; }
    public string Name { get; set; }
    public bool IsChecked { get; set; }
}
  1. Create a DbContext class that inherits from DbContext, and add a DbSet for the Checkbox List items.
public class CheckboxListContext : DbContext
{
    public CheckboxListContext(DbContextOptions<CheckboxListContext> options) : base(options)
    {}

    public DbSet<Color> Colors { get; set; }
}
  1. Set up Entity Framework in the Startup.cs file by adding the DbContext to the services collection and specifying the connection string.
services.AddDbContext<CheckboxListContext>(options => 
    options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
  1. Create a controller with endpoints for getting and updating the Checkbox List items.
[ApiController]
[Route("api/[controller]")]
public class ColorsController : ControllerBase
{
    private readonly CheckboxListContext _context;

    public ColorsController(CheckboxListContext context)
    {
        _context = context;
    }

    [HttpGet]
    public async Task<ActionResult<IEnumerable<Color>>> GetColors()
    {
        return await _context.Colors.ToListAsync();
    }

    [HttpPut]
    public async Task<IActionResult> UpdateColors(IEnumerable<Color> colors)
    {
        foreach (var color in colors)
        {
            _context.Entry(color).State = EntityState.Modified;
        }
        await _context.SaveChangesAsync();

        return NoContent();
    }
}
  1. Add a view in the Views folder that displays the Checkbox List items using Razor syntax.
@model IEnumerable<Color>

<form method="post" action="/api/colors">
    @foreach (var color in Model)
    {
        <div>
            <input type="checkbox" name="colors[@color.Id].IsChecked" @if (color.IsChecked) { <text>checked</text> } />
            <label>@color.Name</label>
        </div>
    }
    <button type="submit">Update</button>
</form>
  1. Add some test data to the database in the SeedData.cs file, and run the application to make sure everything is working.
public static void Initialize(CheckboxListContext context)
{
    if (!context.Colors.Any())
    {
        context.Colors.AddRange(
            new Color { Name = "Red" },
            new Color { Name = "Green" },
            new Color { Name = "Blue" }
        );
        context.SaveChanges();
    }
}
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Asked: 2023-05-07 14:52:45 +0000

Seen: 8 times

Last updated: May 07 '23