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

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

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!ker_reftabExists(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 <ker_reftab> > Postker_reftab(ker_reftab ker_reftab)
        {
            _context.ker_reftab.Add(ker_reftab);
            await _context.SaveChangesAsync();

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

            return(CreatedAtAction("Getker_reftab", new { id = ker_reftab.id }, ker_reftab));
        }