private void buttonSave_Click(object sender, EventArgs e)
{
bookModel.Tittle = textBoxBook_title.Text.Trim();
bookModel.Price = Convert.ToInt32(textBoxPrice.Text);
authorModel.FirstName = textBoxAuthor_FirstName.Text.Trim();
authorModel.LatsName = textBoxAuthor_SecondName.Text.Trim();
using (LibraryEntities db = new LibraryEntities())
{
if (authorModel.Id == 0 && bookModel.Id == 0)
{
db.Authors.Add(authorModel);
db.BOOKS.Add(bookModel);
}
else
{
db.Entry(bookModel).State = System.Data.Entity.EntityState.Modified;
db.Entry(authorModel).State = System.Data.Entity.EntityState.Modified;
}
db.SaveChanges();
Show();
}
}
private void buttonDelete_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Are you sure to delete?", "Process to delete",
MessageBoxButtons.YesNo) == DialogResult.Yes)
{
using (LibraryEntities db = new LibraryEntities())
{
var contextBook = db.Entry(bookModel);
var contextAuthor = db.Entry(authorModel);
if ((contextAuthor.State == System.Data.Entity.EntityState.Detached) &&
(contextBook.State == System.Data.Entity.EntityState.Detached))
{
db.Authors.Attach(authorModel);
db.BOOKS.Attach(bookModel);
}
db.Authors.Remove(authorModel);
db.BOOKS.Remove(bookModel);
db.SaveChanges();
Show();
}
}
}