public void AllChecked()
{
using (var db = new BooksDbContext()) {
db.Books.ToList().ForEach(x => x.IsChecked = true);
db.SaveChanges();
}
}
public Book FindBook(int id)
{
using (var db = new BooksDbContext()) {
var book = db.Books.SingleOrDefault(x => x.Id == id);
if (book == null)
{
return(null);
}
var author = db.Authors.SingleOrDefault(a => a.Id == book.Author.Id);
if (author == null)
{
return(null);
}
var publisher = db.Publishers.SingleOrDefault(p => p.Id == book.Publisher.Id);
if (publisher == null)
{
return(null);
}
return(new Book {
Id = book.Id,
Title = book.Title,
Author = author,
PublishedYear = book.PublishedYear,
Publisher = publisher,
IsChecked = book.IsChecked,
});
}
}
public void AllUnChecked()
{
using (var db = new BooksDbContext()) {
db.Publishers.ToList().ForEach(x => x.IsChecked = false);
db.SaveChanges();
}
}
public void UpdateIsCheckedPublisher(Publisher p, bool isChecked)
{
using (var db = new BooksDbContext()) {
var publisher = db.Publishers.Single(x => x.Id == p.Id);
publisher.IsChecked = isChecked;
db.SaveChanges();
}
}
public void UpdateIsCheckedBook(Book b, bool isChecked)
{
using (var db = new BooksDbContext()) {
var book = db.Books.Single(x => x.Id == b.Id);
book.IsChecked = isChecked;
db.SaveChanges();
}
}
public void UpdateIsCheckedAuthor(Author a, bool isChecked)
{
using (var db = new BooksDbContext()) {
var author = db.Authors.Single(x => x.Id == a.Id);
author.IsChecked = isChecked;
db.SaveChanges();
}
}
public void UpdatePublisher(Publisher p)
{
using (var db = new BooksDbContext()) {
var publisher = db.Publishers.Single(x => x.Id == p.Id);
publisher.Name = p.Name;
publisher.Address = p.Address;
publisher.IsChecked = p.IsChecked;
db.SaveChanges();
}
}
public void DeleteBooks()
{
using (var db = new BooksDbContext()) {
var books = db.Books.Where(x => x.IsChecked == true);
if (books != null)
{
db.Books.RemoveRange(books);
db.SaveChanges();
}
}
}
public void DeletePublisher(int id)
{
using (var db = new BooksDbContext()) {
var publisher = db.Publishers.SingleOrDefault(x => x.Id == id);
if (publisher != null)
{
db.Publishers.Remove(publisher);
db.SaveChanges();
}
}
}
public void DeleteBook(int id)
{
using (var db = new BooksDbContext()) {
var book = db.Books.SingleOrDefault(x => x.Id == id);
if (book != null)
{
db.Books.Remove(book);
db.SaveChanges();
}
}
}
public void DeleteAuthor(int id)
{
using (var db = new BooksDbContext()) {
var author = db.Authors.SingleOrDefault(x => x.Id == id);
if (author != null)
{
db.Authors.Remove(author);
db.SaveChanges();
}
}
}
public void DeletePublishers()
{
using (var db = new BooksDbContext()) {
var publishers = db.Publishers.Where(x => x.IsChecked == true);
if (publishers != null)
{
db.Publishers.RemoveRange(publishers);
db.SaveChanges();
}
}
}
public void UpdateAuthor(Author a)
{
using (var db = new BooksDbContext()) {
var author = db.Authors.Single(x => x.Id == a.Id);
author.Name = a.Name;
author.Birthday = a.Birthday;
author.Gender = a.Gender;
author.IsChecked = a.IsChecked;
db.SaveChanges();
}
}
public void InsertPublisher(Publisher p)
{
using (var db = new BooksDbContext()) {
var publisher = new Publisher {
Name = p.Name,
Address = p.Address,
IsChecked = p.IsChecked
};
db.Publishers.Add(publisher);
db.SaveChanges();
}
}
public void InsertAuthor(Author a)
{
using (var db = new BooksDbContext()) {
var author = new Author {
Name = a.Name,
Birthday = a.Birthday,
Gender = a.Gender,
IsChecked = a.IsChecked
};
db.Authors.Add(author);
db.SaveChanges();
}
}
public IEnumerable <Publisher> GetPublishers()
{
using (var db = new BooksDbContext()) {
return(db.Publishers
.OrderBy(x => x.Id).ToList()
.Select(x => new Publisher {
Id = x.Id,
Name = x.Name,
Address = x.Address,
IsChecked = x.IsChecked,
Books = x.Books
}).ToList());
}
}
public void UpdateBook(Book b)
{
using (var db = new BooksDbContext()) {
var book = db.Books.Single(x => x.Id == b.Id);
var author = db.Authors.Single(a => a.Id == b.Author.Id);
var publisher = db.Publishers.Single(p => p.Id == b.Publisher.Id);
book.Title = b.Title;
book.Author = author;
book.PublishedYear = b.PublishedYear;
book.Publisher = publisher;
book.IsChecked = b.IsChecked;
db.SaveChanges();
}
}
public IEnumerable <Author> GetAuthors()
{
using (var db = new BooksDbContext()) {
return(db.Authors
.OrderBy(x => x.Id).ToList()
.Select(x => new Author {
Id = x.Id,
Name = x.Name,
Birthday = x.Birthday,
Gender = x.Gender,
IsChecked = x.IsChecked,
Books = x.Books
}).ToList());
}
}
public IEnumerable <Book> GetBooks()
{
using (var db = new BooksDbContext()) {
return(db.Books
.OrderByDescending(x => x.PublishedYear).ToList()
.Select(x => new Book {
Id = x.Id,
Title = x.Title,
Author = x.Author,
PublishedYear = x.PublishedYear,
Publisher = x.Publisher,
IsChecked = x.IsChecked
}).ToList());
}
}
public void InsertBook(Book b)
{
using (var db = new BooksDbContext()) {
var author = db.Authors.Single(a => a.Id == b.Author.Id);
var publisher = db.Publishers.Single(p => p.Id == b.Publisher.Id);
var book = new Book {
Title = b.Title,
Author = author,
PublishedYear = b.PublishedYear,
Publisher = publisher,
IsChecked = b.IsChecked
};
db.Books.Add(book);
db.SaveChanges();
}
}
public bool?GetThreeState()
{
using (var db = new BooksDbContext()) {
if (db.Publishers.All(x => x.IsChecked == true))
{
return(true);
}
else if (db.Publishers.All(x => x.IsChecked == false))
{
return(false);
}
else
{
return(null);
}
}
}
public Publisher FindPublisher(int id)
{
using (var db = new BooksDbContext()) {
var publisher = db.Publishers.SingleOrDefault(x => x.Id == id);
if (publisher == null)
{
return(null);
}
return(new Publisher {
Id = publisher.Id,
Name = publisher.Name,
Address = publisher.Address,
IsChecked = publisher.IsChecked
});
}
}
public IEnumerable <string> GetPublisherNamesInBooks()
{
using (var db = new BooksDbContext()) {
var ids = db.Publishers
.Where(x => x.IsChecked == true)
.Select(x => x.Id).ToList();
return(db.Books
.OrderByDescending(x => x.Id).ToList()
.Where(x => ids.Contains(x.Publisher.Id))
.Join(db.Publishers,
book => book.Publisher.Id,
publisher => publisher.Id,
(book, publisher) => publisher.Name)
.Distinct()
.ToList());
}
}
public Author FindAuthor(int id)
{
using (var db = new BooksDbContext()) {
var author = db.Authors.SingleOrDefault(x => x.Id == id);
if (author == null)
{
return(null);
}
return(new Author {
Id = author.Id,
Name = author.Name,
Birthday = author.Birthday,
Gender = author.Gender,
IsChecked = author.IsChecked,
Books = author.Books
});
}
}
public IEnumerable <Book> SearchBooks(string searchString)
{
var searchTerms = searchString.ToLower().Split(null);
using (var db = new BooksDbContext()) {
if (searchTerms.Length == 0)
{
return(null);
}
return(db.Books
.Where(book => searchTerms.Any(s => book.Title.Contains(s))).ToList()
.Select(x => new Book {
Id = x.Id,
Title = x.Title,
Author = x.Author,
PublishedYear = x.PublishedYear,
Publisher = x.Publisher,
IsChecked = x.IsChecked
}).ToList());
}
}
public bool HasPublisherInBooks(int id)
{
using (var db = new BooksDbContext()) {
return(db.Books.Any(x => x.Publisher.Id == id));
}
}
