파일 업로드

Index.cshtml


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

<div class="text-center">
    <!-- 메시지를 표시하는 영역 -->    
    <div>
    @ViewBag.Message
    </div>
     <br/>

    <form method="POST" enctype="multipart/form-data" action="/Home/UploadFile">
        <!-- 파일 업로드 form enctype는 multipart/form-data는 메소드 타입은 POST, URL은 /Home/FileUpload이다. -->
        <input type="file" name="file" multiple /> <!-- file input 태그, 이름은 file, 복수 파일 첨부를 위해 multiple 속성을 추가한다. --> 
        <input type="submit">  
     </form>

</div>

ViewData["Title"] = "Home Page";

Layout = null;

}

<div>

@ViewBag.Message

</div>

<br/>

</form>

</div>

HomeeController.cs


using Microsoft.AspNetCore.Mvc;
using System.Diagnostics;
using WebApplication3.Models;
using System.IO;
using Microsoft.AspNetCore.Http;

namespace WebApplication3.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {
            return View();
        }

        public async Task<IActionResult> UploadFile(IFormFile file)
        {
            if (file == null || file.Length == 0)
            {
                return Content("No file selected for upload.");
            }

            var path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/uploads", file.FileName);

            using (var stream = new FileStream(path, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }

            ViewBag.Message = "File Uploaded Successfully.";
            //return RedirectToAction("Index"); // Or any view you want to redirect to
            return View("Index");
        }



        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}

using Microsoft.AspNetCore.Mvc;

using System.Diagnostics;

using WebApplication3.Models;

using System.IO;

using Microsoft.AspNetCore.Http;

namespace WebApplication3.Controllers

{

public class HomeController : Controller

{

private readonly ILogger<HomeController> _logger;

public HomeController(ILogger<HomeController> logger)

{

_logger = logger;

}

public IActionResult Index()

{

return View();

}

public async Task<IActionResult> UploadFile(IFormFile file)

{

if (file == null || file.Length == 0)

{

return Content("No file selected for upload.");

}

var path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot/uploads", file.FileName);

using (var stream = new FileStream(path, FileMode.Create))

{

await file.CopyToAsync(stream);

}

ViewBag.Message = "File Uploaded Successfully.";

//return RedirectToAction("Index"); // Or any view you want to redirect to

return View("Index");

}

[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]

public IActionResult Error()

{

return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });

}