public async Task <IActionResult> Putdoc_document(long id, doc_document doc_document)
        {
            if (id != doc_document.id)
            {
                return(BadRequest());
            }

            _context.Entry(doc_document).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!doc_documentExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            var lMsg  = new ServerUpdateHubMsg(_entity, ServerUpdateHubMsg.TOperation.UPDATE, id);
            var lJson = JsonConvert.SerializeObject(lMsg);
            await _hubContext.Clients.All.SendAsync(lMsg.entity, lJson);

            return(NoContent());
        }
        public async Task <ActionResult <doc_document> > Postdoc_document(doc_document doc_document)
        {
            _context.doc_document.Add(doc_document);
            await _context.SaveChangesAsync();

            var lMsg  = new ServerUpdateHubMsg(_entity, ServerUpdateHubMsg.TOperation.INSERT, doc_document.id);
            var lJson = JsonConvert.SerializeObject(lMsg);
            await _hubContext.Clients.All.SendAsync(lMsg.entity, lJson);

            return(CreatedAtAction("Getdoc_document", new { id = doc_document.id }, doc_document));
        }