private void button9_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
dataGridView1.DataSource = db.Customers
.Select(c => new { c.Id, c.Name }).ToList();
}
}
private void button8_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
dataGridView1.DataSource = db.Authors
.Select(a => new { a.Id, a.FullName }).ToList();
}
}
private void button7_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
dataGridView1.DataSource = db.Books
.Select(b => new { b.Id, b.Title, b.Price, b.Pages, b.CustomerId }).ToList();
}
}
private void button3_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
dataGridView1.DataSource = db.Books.Where(b => b.Id == 3).
FirstOrDefault().Author.Select(a => new { a.FullName }).ToList();
}
}
private void button2_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
dataGridView1.DataSource = (from customer in db.Customers
join book in db.Books on customer.Id equals book.CustomerId
select new { Deptor = customer.Name }
).Distinct().ToList();
}
}
private void button6_Click(object sender, EventArgs e)
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
foreach (Book item in db.Books)
{
item.Customer = null;
item.CustomerId = null;
}
db.SaveChanges();
}
}
private void button1_Click(object sender, EventArgs e)
{
try
{
using (LibraryModelContainer db = new LibraryModelContainer())
{
Author author = new Author()
{
FullName = "Lorenso Lamos"
};
db.Authors.Add(author);
Author author1 = new Author()
{
FullName = "John Travolta"
};
db.Authors.Add(author1);
Author author2 = new Author()
{
FullName = "Friedrich Nietzsche"
};
db.Authors.Add(author2);
Book book = new Book()
{
Title = "Iskustvo Pofigizma", Pages = 45, Price = 240
};
book.Author.Add(author);
book.Author.Add(author1);
db.Books.Add(book);
Book book1 = new Book()
{
Title = "Thus Spoke Zarathustra", Pages = 352, Price = 350
};
book1.Author.Add(author2);
db.Books.Add(book1);
Author author3 = new Author()
{
FullName = "J.R.R.Tolkien"
};
db.Authors.Add(author3);
Book book2 = new Book()
{
Title = "The Lord of the Rings", Pages = 1685, Price = 2650
};
book2.Author.Add(author3);
db.Books.Add(book2);
Book book3 = new Book()
{
Title = "Bratva and the Ring", Pages = 684, Price = 1350
};
book3.Author.Add(author3);
db.Books.Add(book3);
Customer[] customers = { new Customer()
{
Name = "Balde Keita"
},
new Customer()
{
Name = "Timo Werner"
},
new Customer()
{
Name = "Chupomoting"
} };
db.Customers.AddRange(customers);
book3.Customer = customers[2];
book2.Customer = customers[2];
book.Customer = customers[1];
db.SaveChanges();
}
(sender as Button).Text = "Done";
(sender as Button).Enabled = false;
}
catch
{ }
}
