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

using Dapper;
using Diligent.WebAPI.Contracts.DTOs.Document;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Configuration;
using System.Data.SqlClient;
using static System.Net.Mime.MediaTypeNames;

namespace Diligent.WebAPI.Business.Services
{
    public class DocumentService : IDocumentService
    {
        private readonly IConfiguration _configuration;

        public DocumentService(IConfiguration configuration)
        {
            _configuration = configuration;
        }
        public async Task<DocumentReadDTO> UploadDocument(IFormFile file)
        {
            using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));
            var ms = new MemoryStream();
            file.CopyTo(ms);
            var fileBytes = ms.ToArray();
            string fileName = string.Format(@"{0}" + $"{Path.GetExtension(file.FileName)}", DateTime.Now.Ticks);
            await connection.ExecuteAsync("insert into dbo.DocumentOrganizerDocStore (file_stream,name) values(@fileBytes,@fileName)",
            new { fileBytes = fileBytes, fileName = fileName });

            var fileByName = await connection.QueryFirstAsync<DocumentReadDTO>("select * from dbo.DocumentOrganizerDocStore where name=@fileName",
                new { fileName = fileName });
            return fileByName;
        }
    }
}