private void Show()
{
dataGridView1.Rows.Clear();
var context = new LibraryEntities();
foreach (var books in context.BOOKS)
{
dataGridView1.Rows.Add(books.Id.ToString(), books.Author.FirstName, books.Author.LatsName, books.Tittle, books.Price);
}
}
private void dataGridView1_MouseClick(object sender, MouseEventArgs e)
{
if (dataGridView1.CurrentRow.Index != -1)
{
bookModel.Id = Convert.ToInt32(dataGridView1.CurrentRow.Cells["ID"].Value);
using (LibraryEntities db = new LibraryEntities())
{
authorModel = db.Authors.Where(x => x.Id == bookModel.Id).FirstOrDefault();
bookModel = db.BOOKS.Where(x => x.Id == bookModel.Id).FirstOrDefault();
textBoxAuthor_FirstName.Text = authorModel.FirstName;
textBoxAuthor_SecondName.Text = authorModel.LatsName;
textBoxBook_title.Text = bookModel.Tittle;
textBoxPrice.Text = (bookModel.Price).ToString();
}
buttonSave.Text = "Update";
buttonDelete.Enabled = false;
}
buttonDelete.Enabled = true;
}
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();
}
}
}
