IFormFile Загрузка изображения не работает ASP. NET Core - PullRequest
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IFormFile Загрузка изображения не работает ASP. NET Core

0 голосов
/ 02 марта 2020

У меня проблема с загрузкой изображений для приложения MVC в ASP. NET Core, проблема, с которой я сталкиваюсь сейчас, заключается в том, что при отправке формы создания с загрузкой изображения файл не удается чтобы попасть в мою папку wwwroot/images , а также объекты в моем DBInitilizer не могут загрузить стандартное "noimage.jpg" изображение.

Кому уточнить полностью, когда я отправляю форму Создать, объект успешно создан и загружается с "noimage.jpg" изображением по умолчанию.

Вот мой код, пожалуйста, дайте мне знать, если любые дополнительные файлы, которые я должен показать. Заранее спасибо.

Контроллер транспортных средств: ** Управление созданием и загрузкой изображений **

namespace ProjectApplicationX00140684.Controllers
{
    public class VehiclesController : Controller
    {
        private readonly VehicleContext _context;
        private readonly IHostingEnvironment hostingEnvironment;

        public VehiclesController(VehicleContext context,
                                    IHostingEnvironment hostingEnvironment)
        {
            _context = context;
            this.hostingEnvironment = hostingEnvironment;

    }

        // GET: Vehicles
        public async Task<IActionResult> Index()
        {
            return View(await _context.Vehicles.ToListAsync());
        }

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

            var vehicle = await _context.Vehicles
                .FirstOrDefaultAsync(m => m.VehicleID == id);
            if (vehicle == null)
            {
                return NotFound();
            }

            return View(vehicle);
        }

        // GET: Vehicles/Create
        public IActionResult Create()
        {
            return View();
        }

        // POST: Vehicles/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("VehicleID,Make,Model,Year")] Vehicle vehicle, VehicleCreateViewModel model)
        {
            if (ModelState.IsValid)
            {
                string uniqueFileName = null;

                // If the Photo property on the incoming model object is not null, then the user
                // has selected an image to upload.                                                                   
                if (model.Photo != null)
                {
                    // The image must be uploaded to the images folder in wwwroot
                    // To get the path of the wwwroot folder we are using the inject
                    // HostingEnvironment service provided by ASP.NET Core
                    string uploadsFolder = Path.Combine(hostingEnvironment.WebRootPath, "images");
                    // To make sure the file name is unique we are appending a new
                    // GUID value and and an underscore to the file name
                    uniqueFileName = Guid.NewGuid().ToString() + "_" + Path.GetFileName(model.Photo.FileName);
                    string filePath = Path.Combine(uploadsFolder, uniqueFileName);
                    // Use CopyTo() method provided by IFormFile interface to
                    // copy the file to wwwroot/images folder
                    model.Photo.CopyTo(new FileStream(filePath, FileMode.Create));
                }


                _context.Add(vehicle);
                await _context.SaveChangesAsync();
                return RedirectToAction(nameof(Index));
            }
            return View(vehicle);
        }

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

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

        // POST: Vehicles/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("VehicleID,Make,Model,Year")] Vehicle vehicle)
        {
            if (id != vehicle.VehicleID)
            {
                return NotFound();
            }

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

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

            var vehicle = await _context.Vehicles
                .FirstOrDefaultAsync(m => m.VehicleID == id);
            if (vehicle == null)
            {
                return NotFound();
            }

            return View(vehicle);
        }

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

        private bool VehicleExists(int id)
        {
            return _context.Vehicles.Any(e => e.VehicleID == id);
        }
    }
}

Create.cs html 

@model ProjectApplicationX00140684.Models.VehicleCreateViewModel


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

<h1>Create</h1>

<h4>Vehicle</h4>
<hr />
<form enctype="multipart/form-data" asp-controller="vehicles" asp-action="create"
      method="post" class="mt-3">
    <div class="form-group row">
        <label asp-for="Make" class="col-sm-2 col-form-label"></label>
        <div class="col-sm-10">
            <input asp-for="Make" class="form-control" placeholder="Make">
            <span asp-validation-for="Make" class="text-danger"></span>
        </div>
    </div>
    <div class="form-group row">
        <label asp-for="Model" class="col-sm-2 col-form-label"></label>
        <div class="col-sm-10">
            <input asp-for="Model" class="form-control" placeholder="Model">
            <span asp-validation-for="Model" class="text-danger"></span>
        </div>
    </div>

    <div class="form-group row">
        <label asp-for="Year" class="col-sm-2 col-form-label"></label>
        <div class="col-sm-10">
            <input asp-for="Year" class="form-control" placeholder="Year">
            <span asp-validation-for="Year" class="text-danger"></span>
        </div>
    </div>

    @*  asp-for tag helper is set to "Photo" property. "Photo" property type is IFormFile
        so at runtime asp.net core generates file upload control (input type=file)
    *@


    <div class="form-group row">
        <label asp-for="Photo" class="col-sm-2 col-form-label"></label>
        <div class="col-sm-10">
            <div class="custom-file">
                <input asp-for="Photo" class="form-control custom-file-input" />
                <label class="custom-file-label">Choose File...</label>
            </div>
        </div>
    </div>

    <div asp-validation-summary="All" class="text-danger"></div>

    <div class="form-group row">
        <div class="col-sm-10">
            <button type="submit" class="btn btn-primary">Create</button>
        </div>
    </div>

    @*This script is required to display the selected file in the file upload element*@

    @section Scripts {
        <script>
            $(document).ready(function () {
                $('.custom-file-input').on("change", function () {
                    var fileName = $(this).val().split("\\").pop();
                    $(this).next('.custom-file-label').html(fileName);
                });
            });
        </script>
    }
</form>


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

Startup.cs 

namespace ProjectApplicationX00140684
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {

            services.AddDbContext<ApplicationDbContext>(options =>
    options.UseSqlServer(
        Configuration.GetConnectionString("DefaultConnection")));
services.AddDefaultIdentity<IdentityUser>()
    .AddDefaultUI(UIFramework.Bootstrap4)
    .AddEntityFrameworkStores<ApplicationDbContext>();
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });

            services.AddDbContext<VehicleContext>(options =>
    options.UseSqlServer(
        Configuration.GetConnectionString("DefaultConnection")));

            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                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();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();
            app.UseAuthentication();
            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}
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