// To protect from overposting attacks, enable the specific properties you want to bind to, for
// more details, see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return(Page());
}
_context.Attach(Category).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!CategoryExists(Category.ID))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}
// To protect from overposting attacks, enable the specific properties you want to bind to, for
// more details, see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync(int?id, string[] selectedCategories)
{
if (id == null)
{
return(NotFound());
}
var bookToUpdate = await _context.Book
.Include(i => i.Publisher)
.Include(i => i.BookCategories)
.ThenInclude(i => i.Category)
.FirstOrDefaultAsync(s => s.ID == id);
if (bookToUpdate == null)
{
return(NotFound());
}
if (await TryUpdateModelAsync <Book>(
bookToUpdate,
"Book",
i => i.Title, i => i.Author,
i => i.Price, i => i.PublishingDate, i => i.Publisher))
{
UpdateBookCategories(_context, selectedCategories, bookToUpdate);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
if (!ModelState.IsValid)
{
return(Page());
}
_context.Attach(Book).State = EntityState.Modified;
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!BookExists(Book.ID))
{
return(NotFound());
}
else
{
throw;
}
}
UpdateBookCategories(_context, selectedCategories, bookToUpdate);
PopulateAssignedCategoryData(_context, bookToUpdate);
return(Page());
}