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;

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

        public DocumentService(IConfiguration configuration)
        {
            _configuration = configuration;
        }
        public async Task<List<DocumentReadDTO>> GetAllDocuments()
        {
            using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));
            var files = await connection.QueryAsync<DocumentReadDTO>("select * from dbo.DocumentOrganizerDocStore");
            return files.ToList();
        }

        public async Task<List<DocumentReadDTO>> GetDocumentsByText(string text)
        {
            using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));
            var files = await connection.QueryAsync<DocumentReadDTO>("select * from dbo.DocumentOrganizerDocStore where contains(file_stream, @text)",
                new { text = text });
            return files.ToList();
        }

        public async Task UploadDocument(IFormFile file)
        {
            using var connection = new SqlConnection(_configuration.GetConnectionString("WebApi"));
            var ms = new MemoryStream();
            file.CopyTo(ms);
            var fileBytes = ms.ToArray();
            await connection.ExecuteAsync("insert into dbo.DocumentOrganizerDocStore (file_stream,name) values(@fileBytes,'neki2.txt')", 
                new { fileBytes = fileBytes });
        }
    }
}