private void BrowseImageView_OnLoaded(object sender, RoutedEventArgs e)
{
if (_context == null)
{
_context = DataContext as BrowseImagesViewModel;
}
}
public IActionResult Index(BrowseImagesViewModel viewModel)
{
//Implement an empty cache List named cacheEntryList
List <FileUpload> cacheEntryList;
if (!_memoryCache.TryGetValue(CacheKeysClass.AllImagesFound, out cacheEntryList))
{
// cacheEntryList will be created taking images from DataRepository using repo.GetFileUploads()
cacheEntryList = repo.GetFileUploads().OrderByDescending(x => x.Image.DateAdded).ToList();
// Add image in CacheKeysClass in AllImagesFound property
_memoryCache.Set(CacheKeysClass.AllImagesFound, cacheEntryList);
}
var listOfAllCategories = repo.GetCategories().ToList();
var IdForAllCategories = repo.GetCategories().Where(x => x.Id == viewModel.CategoryId).FirstOrDefault();
if (viewModel.CategoryId == 0 || IdForAllCategories.Name == "All Categories")
{
//Initial, before to implement cache, AllImages came from DataRepository
//var AllImages = repo.GetFileUploads().ToList();
var viewObjectWithCache = new BrowseImagesViewModel
//{ FileUpload = AllImages };
// Now, FileUpload property of viewObjectWithCache object is taken from cacheEntryList instead of AllImages
{
FileUpload = cacheEntryList
};
viewObjectWithCache.Categories = listOfAllCategories.Select(x => new SelectListItem
{
Text = x.Name,
Value = x.Id.ToString()
});
return(View(viewObjectWithCache));
}
else
{
// Initial, before to implement cache, AllImages came from DataRepository using repo.GetFileUploads()
//var AllImages = repo.GetFileUploads().ToList();
var selectedViewObject = new List <FileUpload>();
//selectedViewObject contains initial AllImages from DB with specific CategoryId
//selectedViewObject = AllImages.Where(x => x.Image.CategoryId == vm.CategoryId).ToList();
// Now, selectedViewObject list is taken from cacheEntryList
selectedViewObject = cacheEntryList.Where(x => x.Image.CategoryId == viewModel.CategoryId).ToList();
var objectWithCache = new BrowseImagesViewModel
// Now, FileUpload property of objectWithCache object is taken from selectedViewObject list
{
FileUpload = selectedViewObject
};
objectWithCache.Categories = listOfAllCategories.Select(x => new SelectListItem
{
Text = x.Name,
Value = x.Id.ToString()
});
return(View(objectWithCache));
}
}
