public ActionResult AddBook(Book book)
{
Author author = null;
author = authorManager.GetAuthorByID(book.AuthorID);
Publisher publisher = null;
publisher = publisherManager.GetPublisherByID(book.Publisher);
string authorIDText = Request.Form["AuthorID"];
int authorID = 0;
int.TryParse(authorIDText, out authorID);
book.AuthorID = authorID;
try
{
UpdateModel <Book>(book);
}
catch (Exception) { /* book model cannot be updated */ }
if (ModelState.IsValid)
{
if (bookManager.CheckISBN(book.ISBN))
{
ModelState.AddModelError("", "ISBN already exists");
return(View());
}
else if (author == null)
{
ModelState.AddModelError("", "Author does not exist");
return(View());
}
else if (publisher == null)
{
ModelState.AddModelError("", "Publisher does not exist");
return(View());
}
else
{
bookManager.AddNewBook(book);
return(RedirectToAction("Details", "Book", book));
}
}
else
{
return(View());
}
}