public IViewComponentResult Invoke(RequestFormData requestFormData)
{
var newsSources = _dbContext.NewsSources.OrderBy(ns => ns.Name);
ViewBag.NewsSources = new SelectList(newsSources, nameof(NewsSource.Id), nameof(NewsSource.Name));
return(View(requestFormData));
}
public IActionResult Index(RequestFormData requestFormData)
{
TempData["newsSource"] = requestFormData.NewsSource;
TempData["orderByDate"] = requestFormData.OrderByDate;
RouteData.Values.Clear();
return(RedirectToAction());
}
protected async Task <NewsListViewModel> GetNewsAsync(int?newsSource, bool?orderByDate, int page)
{
var pagingInfo = new PagingInfoViewModel
{
CurrentPage = page,
ItemsPerPage = NEWS_PER_PAGE
};
var requestFormData = new RequestFormData
{
NewsSource = newsSource
};
if (orderByDate.HasValue)
{
requestFormData.OrderByDate = orderByDate.Value;
}
var newsListViewModel = new NewsListViewModel
{
News = Enumerable.Empty <NewsViewModel>(),
PagingInfo = pagingInfo,
RequestFormData = requestFormData
};
if (!(await _dbContext.NewsSources.AnyAsync()))
{
return(newsListViewModel);
}
var news = _dbContext.News.Include(n => n.NewsSource).AsQueryable();
if (requestFormData.NewsSource.HasValue)
{
if ((await _dbContext.NewsSources.FindAsync(requestFormData.NewsSource.Value)) == null)
{
return(newsListViewModel);
}
news = news.Where(n => n.NewsSource.Id == requestFormData.NewsSource.Value);
}
pagingInfo.TotalItems = await news.CountAsync();
news = requestFormData.OrderByDate ?
news.OrderByDescending(n => n.PublishDate) :
news.OrderBy(n => n.NewsSource.Name);
news = news.Skip((pagingInfo.CurrentPage - 1) * NEWS_PER_PAGE).Take(NEWS_PER_PAGE);
newsListViewModel.News = await news.ProjectTo <NewsViewModel>(_mapper.ConfigurationProvider).ToArrayAsync();
return(newsListViewModel);
}
