DocumentOrganizer/Diligent.WebAPI.Business/Services/ImportService.cs

using Microsoft.AspNetCore.Http;

namespace Diligent.WebAPI.Business.Services
{
    public class ImportService : IImportService
    {
        private readonly ILogger<ImportService> _logger;
        private readonly ISaveImportedDataService _service;

        public ImportService(ILogger<ImportService> logger, ISaveImportedDataService service)
        {
            _logger = logger;
            _service = service;
        }
        public async Task<List<ApplicantImportDto>> Import(IFormFile fileData)
        {
            try
            {
                using (var stream = new MemoryStream())
                {
                    fileData.CopyTo(stream);
                    var FileData = stream.ToArray();
                    CopyFileToDirectory(FileData);
                }
                return await _service.Save();
            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            return new List<ApplicantImportDto>();
        }
        private async Task CopyFileToDirectory(byte[] FileData)
        {
            try
            {
                var content = new System.IO.MemoryStream(FileData);
                var path = Path.Combine(Directory.GetCurrentDirectory(), "Files", "s.xlsx");

                await CopyStream(content, path);
            }
            catch (Exception)
            {
                throw;
            }
        }
        private async Task CopyStream(Stream stream, string downloadPath)
        {
            using (var fileStream = new FileStream(downloadPath, FileMode.Create, FileAccess.Write))
            {
                await stream.CopyToAsync(fileStream);
            }
        }
    }
}