c# - uploading image asp.net Core

Question

i am new to ASP.net COre and i would like to upload a file ( an image) and store it in a secific Folder. ihave been following this tuto (File uploads in ASP.NET Core) but i dont know how to store it in a file it is just uploaded on the server this is the html :

<form method="post" enctype="multipart/form-data" asp-controller="UploadFiles" asp-action="Index">
<div class="form-group">
    <div class="col-md-10">
        <p>Upload one or more files using this form:</p>
        <input type="file" name="files" multiple />
    </div>
</div>
<div class="form-group">
    <div class="col-md-10">
        <input type="submit" value="Upload" />
    </div>
</div>

this is the Controller

[HttpPost("UploadFiles")]
public async Task<IActionResult> Post(List<IFormFile> files)
{
long size = files.Sum(f => f.Length);

// full path to file in temp location
var filePath = Path.GetTempFileName();

foreach (var formFile in files)
{
    if (formFile.Length > 0)
    {
        using (var stream = new FileStream(filePath, FileMode.Create))
        {
            await formFile.CopyToAsync(stream);
        }
    }
}

// process uploaded files
// Don't rely on or trust the FileName property without validation.

return Ok(new { count = files.Count, size, filePath});
}

and this is the class i am using

public interface IFormFile
{
string ContentType { get; }
string ContentDisposition { get; }
IHeaderDictionary Headers { get; }
long Length { get; }
string Name { get; }
string FileName { get; }
Stream OpenReadStream();
void CopyTo(Stream target);
Task CopyToAsync(Stream target, CancellationToken cancellationToken = null);
}

i just need to store the image in a folder like :C:UsersDESKTOP-1603DesktopGestionSyndicGestionSyndicsrcWebApplication1wwwrootimages and change the name of the image thank you :D

Answer 1

File upload in ASP.NET Core MVC in simple steps

1.Demo.cshtml View Code snippet

<form method="post" enctype="multipart/form-data" asp-controller="Demo" asp-action="Index">
<div class="form-group">
    <div class="col-md-10">
        <p>Upload one or more files using this form:</p>
        <input type="file" name="files" multiple />
    </div>
</div>
<div class="form-group">
    <div class="col-md-10">
        <input type="submit" value="Upload" />
    </div>
</div>

2. DemoController

For showing demo i have created a Demo Controller which has 2 Action Methods in it one to handle Get Request and another to handle post request.

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using System;
using System.IO;
using System.Net.Http.Headers;

namespace WebApplication6.Controllers
{
    public class DemoController : Controller
    {
        private readonly IHostingEnvironment _environment;

        // Constructor
        public DemoController(IHostingEnvironment IHostingEnvironment)
        {
            _environment = IHostingEnvironment;
        }

        [HttpGet]
        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public IActionResult Index(string name)
        {
            var newFileName = string.Empty;

            if (HttpContext.Request.Form.Files != null)
            {
                var fileName = string.Empty;
                string PathDB = string.Empty;

                var files = HttpContext.Request.Form.Files;

                foreach (var file in files)
                {
                    if (file.Length > 0)
                    {
                        //Getting FileName
                        fileName = ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.Trim('"');

                        //Assigning Unique Filename (Guid)
                        var myUniqueFileName = Convert.ToString(Guid.NewGuid());

                        //Getting file Extension
                        var FileExtension = Path.GetExtension(fileName);

                        // concating  FileName + FileExtension
                        newFileName = myUniqueFileName + FileExtension;

                        // Combines two strings into a path.
                        fileName = Path.Combine(_environment.WebRootPath, "demoImages") + $@"{newFileName}";

                        // if you want to store path of folder in database
                        PathDB = "demoImages/" + newFileName;

                        using (FileStream fs = System.IO.File.Create(fileName))
                        {
                            file.CopyTo(fs);
                            fs.Flush();
                        }
                    }
                }


            }
            return View();
        }
    }
}

Snapshot while Debugging

Location of folder where Images are stored