public static int NumberOfBooks(string title, DictBookGenre bookGenre)
{
using (LibraryContext db = new LibraryContext())
{
var result = db.Books.Where(x => (title == null || x.Title.Contains(title)) &&
(bookGenre.BookGenreId == 0 || x.BookGenreId == bookGenre.BookGenreId)
).Count();
return(result);
}
}
public ReportBookViewModel()
{
BookGenres = DictBookGenreServices.GetAll();
DictBookGenre filterAll = new DictBookGenre()
{
BookGenreId = 0, Name = "All"
};
BookGenres.Add(filterAll);
BookGenres.Move(BookGenres.IndexOf(filterAll), 0);
numberOfBooks = BookServices.NumberOfBooks(null, new DictBookGenre()
{
BookGenreId = 0, Name = null
});
NumberOfBorrowsPerTitle = BorrowServices.NumberOfBorrowsPerTitle(SelectedTitle, SelectedBookGenre, FromDate, ToDate, ActualPage, PageSize);
}
public static List <BorrowDetailsDTO> NumberOfBorrowsPerTitle(string title, DictBookGenre bookGenre, DateTime?fromDate, DateTime?toDate, int actualPage, int pageSize)
{
using (LibraryContext db = new LibraryContext())
{
var result = db.Books.
Where(x => (title == null || x.Title.Contains(title)) &&
(bookGenre.BookGenreId == 0 || x.BookGenreId == bookGenre.BookGenreId)
).Select(x => new BorrowDetailsDTO
{
BookTitle = x.Title,
BookAuthor = x.Author,
BookGenre = x.DictBookGenre.Name,
BorrowsCount = x.Borrow.Where(y => (fromDate == null || y.FromDate >= fromDate) &&
(toDate == null || y.ToDate <= toDate)).Count(),
}).OrderByDescending(x => x.BorrowsCount).Skip(actualPage * pageSize).Take(pageSize).ToList();
return(result);
}
}
public AddBookViewModel()
{
BookGenres = DictBookGenreServices.GetAll();
selectedBookGenre = BookGenres[0];
}
public static string Add(string title, string author, DateTime?releaseDate, string isbn, int count, DictBookGenre selectedBookGenre)
{
using (LibraryContext db = new LibraryContext())
{
string error = null;
Book newBook = new Book();
newBook.Author = author;
newBook.Title = title;
//if (DateTime.TryParse(releaseDate, out dt) && dt.Year > 1753)
//{
// newBook.ReleaseDate = dt;
//}
//else
// newBook.ReleaseDate = null;
newBook.ReleaseDate = releaseDate;
newBook.ISBN = isbn;
newBook.Count = count;
newBook.AddDate = DateTime.Now;
newBook.ModifiedDate = DateTime.Now;
newBook.BookGenreId = selectedBookGenre.BookGenreId;
var context = new ValidationContext(newBook, null, null);
var result = new List <System.ComponentModel.DataAnnotations.ValidationResult>();
Validator.TryValidateObject(newBook, context, result, true);
foreach (var x in result)
{
error = error + x.ErrorMessage + "\n";
}
if (error == null)
{
db.Books.Add(newBook);
db.SaveChanges();
}
return(error);
}
}
