public async Task <PageViewModel> UpdatePageAsync(PageViewModel pageViewModel) { if (pageViewModel == null) { throw new ArgumentNullException(nameof(pageViewModel)); } var page = await _pageStore.GetPageByIdAsync(pageViewModel.Id); if (page == null) { return(null); } page.Name = pageViewModel.Name; page.Active = pageViewModel.Active; page.OrderIndex = pageViewModel.OrderIndex; page.LastUpdate = DateTime.UtcNow; if (!string.IsNullOrWhiteSpace(pageViewModel.Url)) { page.Url = pageViewModel.Url; } await _pageStore.UpdatePageAsync(page); var result = _mapper.Map <PageViewModel>(page); return(result); }