public async Task <IActionResult> OnGetAsync(int?id)
{
if (id == null)
{
if (id == null)
{
return(NotFound());
}
Book = await _context.Book.FirstOrDefaultAsync(m => m.ID == id);
if (Book == null)
{
return(NotFound());
}
ViewData["PublisherID"] = new SelectList(_context.Set <Publisher>(), "ID", "PublisherName");
return(NotFound());
}
Book = await _context.Book
.Include(b => b.Publisher)
.Include(b => b.BookCategories).ThenInclude(b => b.Category)
.AsNoTracking()
.FirstOrDefaultAsync(m => m.ID == id);
if (Book == null)
{
return(NotFound());
}
PopulateAssignedCategoryData(_context, Book);
ViewData["PublisherID"] = new SelectList(_context.Publisher, "ID", "PublisherName");
return(Page());
}
public IActionResult OnGet()
{
var book = new Book();
book.BookCategories = new List <BookCategory>();
PopulateAssignedCategoryData(_context, book);
ViewData["PublisherID"] = new SelectList(_context.Set <Publisher>(), "ID", "PublisherName");
return(Page());
}