public static void AddBookComplex(string title, List<string> authors, long? isbn, decimal? price, string webSite, List<ReviewStruct> reviews)
{
using (BookstoreEntities dbContext = new BookstoreEntities())
{
//Create authors
List<Author> bookAuthors = new List<Author>();
foreach (var authorName in authors)
{
Author author = CreateOrLoadAuthor(authorName, dbContext);
bookAuthors.Add(author);
}
//Create reviews
List<Review> bookReviews = new List<Review>();
foreach (var reviewInfo in reviews)
{
Review review = new Review();
if (reviewInfo.AuthorName != null)
{
review.Author = CreateOrLoadAuthor(reviewInfo.AuthorName, dbContext);
}
review.Creation_Date = reviewInfo.CreationDate;
review.Text = reviewInfo.Text;
bookReviews.Add(review);
}
CheckIsbnUniqueness(isbn, dbContext);
//Create book
Book newBook = new Book() { Title = title, ISBN = isbn, Price = price, Web_Site = webSite };
foreach (var author in bookAuthors)
{
newBook.Authors.Add(author);
}
foreach (var review in bookReviews)
{
newBook.Reviews.Add(review);
}
//Save book
dbContext.Books.Add(newBook);
dbContext.SaveChanges();
}
}
public void BooksComplexParse()
{
var books = this.GetBooksXml();
foreach (var bookXml in books)
{
var title = bookXml.Element("title").Value;
var book = new Book { Title = title };
var authorsXml = bookXml.Elements("authors");
var authors = authorsXml.Select(authorXml => AuthorDao.GetOrCreateAuthor(this.Entities, authorXml.Value)).ToList();
book.Authors = authors;
this.BookSetNotRequiredProperty("ISBN", "isbn", bookXml, book);
this.BookSetNotRequiredProperty("Price", "price", bookXml, book);
this.BookSetNotRequiredProperty("Url", "web-site", bookXml, book);
var reviewsXml = bookXml.Elements("reviews");
var reviews = new List<Review>();
foreach (var reviewXml in reviewsXml)
{
var dateAttribute = reviewXml.Attribute("date");
string date = null;
if (dateAttribute != null)
{
date = dateAttribute.Value;
}
var authorAttribute = reviewXml.Attribute("author");
string author = null;
if (authorAttribute != null)
{
author = authorAttribute.Value;
}
reviews.Add(ReviewDao.CreateReview(this.Entities, reviewXml.Value, date, author));
}
book.Reviews = reviews;
this.Entities.Books.Add(book);
this.Entities.SaveChanges();
}
}
public void SimpleBooksParse()
{
var books = this.GetBooksXml();
foreach (var bookXml in books)
{
var title = bookXml.Element("title").Value;
var book = new Book { Title = title };
var authorName = bookXml.Element("author").Value;
var author = AuthorDao.GetOrCreateAuthor(this.Entities, authorName);
book.Authors.Add(author);
this.BookSetNotRequiredProperty("ISBN", "isbn", bookXml, book);
this.BookSetNotRequiredProperty("Price", "price", bookXml, book);
this.BookSetNotRequiredProperty("Url", "web-site", bookXml, book);
this.Entities.Books.Add(book);
this.Entities.SaveChanges();
}
}
public static void AddBook(string title, string authorName, long? isbn, decimal? price)
{
using (BookstoreEntities dbContext = new BookstoreEntities())
{
Author author = CreateOrLoadAuthor(authorName, dbContext);
CheckIsbnUniqueness(isbn, dbContext);
Book newBook = new Book() { Title = title, ISBN = isbn, Price = price };
newBook.Authors.Add(author);
dbContext.Books.Add(newBook);
dbContext.SaveChanges();
}
}
protected void BookSetAuthors(ICollection<Author> authors, Book book)
{
book.Authors = authors;
}
protected void BookSetNotRequiredProperty(string propertyName, string xmlTagName, XElement bookXml, Book book)
{
var element = bookXml.Element(xmlTagName);
if (element == null)
{
return;
}
var bookType = book.GetType();
var property = bookType.GetProperty(propertyName);
object elementValue = element.Value;
if (property.PropertyType.IsAssignableFrom(typeof(Nullable<decimal>)))
{
elementValue = decimal.Parse(element.Value);
}
property.SetValue(book, elementValue);
}
