public HistoryPage()
{
InitializeComponent();
var entities = new LibraryEntities();
var query = from lend in entities.LendHistories
select new { DataWypozyczenia = lend.LendingDate, DataZwrotu = lend.ReturnDate, Nazwisko = lend.Reader.LastName, Imie = lend.Reader.FirstName, Autor = lend.Book.Author.LastName, Tytul = lend.Book.Title };
historyDataGrid.ItemsSource = query.ToList();
}
private void returnBookBtn_Click(object sender, RoutedEventArgs e)
{
LibraryEntities entities = new LibraryEntities();
ReturnGridRow selectedItem = returnDataGrid.SelectedItem as ReturnGridRow;
var lendHistory = entities.LendHistories.Find(selectedItem.LendId);
lendHistory.ReturnDate = DateTime.Now;
entities.SaveChanges();
showLends();
}
private void lendButton_Click(object sender, RoutedEventArgs e)
{
wrongDataText.Text = "";
var db = new LibraryEntities();
if (peselInput.Text.Length < 11 || !(peselInput.Text.All(char.IsDigit)))
{
wrongDataText.Text = "Niepoprawny pesel. Wpisz ponownie.";
}
var queryInputReader = from reader in db.Readers
where reader.Pesel == peselInput.Text & reader.Active == true
select reader;
var readers = queryInputReader.ToList <Reader>();
foreach (Reader reader in readers)
{
LendHistory lendHistory = new LendHistory();
LendGridRow selectedItem = lendDataGrid.SelectedItem as LendGridRow;
if (selectedItem != null)
{
if (!selectedItem.Wypozyczono)
{
lendHistory.ReaderID = reader.ID;
lendHistory.BookID = selectedItem.ISBN;
lendHistory.LendingDate = DateTime.Now;
db.LendHistories.Add(lendHistory);
db.SaveChanges();
wrongDataText.Text = "";
correctDataText.Text = "Wypożyczono.";
}
else
{
wrongDataText.Text = "Książka jest już wypożyczona.";
}
}
else
{
wrongDataText.Text = "Wybierz książkę.";
}
}
showBooks();
}
private void showBooks()
{
var db = new LibraryEntities();
var query = from book in db.Books
where book.InStock
join lend in db.LendHistories
on book.ISBN equals lend.BookID into j
from lend in j.DefaultIfEmpty()
where lend == null | lend.ReturnDate == null
select new LendGridRow {
ISBN = book.ISBN, Imie_Autora = book.Author.FirstName, Nazwisko_Autora = book.Author.LastName, Tytul = book.Title,
Wypozyczono = lend != null && lend.ReturnDate == null
};
lendDataGrid.ItemsSource = query.ToList();
lendDataGrid.Items.Refresh();
}
private void showLends()
{
LibraryEntities entities = new LibraryEntities();
var pesel = peselBox.Text;
var query = from lend in entities.LendHistories
where (lend.Reader.Pesel == pesel) && lend.ReturnDate == null && lend.Book.InStock == true
select new ReturnGridRow
{
LendId = lend.ID,
Imie = lend.Reader.FirstName,
Nazwisko = lend.Reader.LastName,
Tytul = lend.Book.Title,
DataWypozyczenia = lend.LendingDate,
DataZwrotu = lend.ReturnDate,
ISBN = lend.BookID
};
returnDataGrid.ItemsSource = query.ToList();
returnDataGrid.Columns[0].Visibility = Visibility.Collapsed;
returnDataGrid.Items.Refresh();
}
