private void insertbtn_Click(object sender, EventArgs e)
{
if (titletb.Text != "" && categorycb.Text != "" && authorcb.Text != "" && qtytb.Text != "" && pricetb.Text != "")
{
if (lc.verifyCategory(dt1, categorycb.Text) && lc.verifyAuthor(dt2, authorcb.Text))
{
MessageBox.Show(lc.addBook(titletb.Text, categorycb.SelectedValue.ToString(), authorcb.SelectedValue.ToString(), int.Parse(pricetb.Text), int.Parse(qtytb.Text)));
}
else if (!lc.verifyCategory(dt1, categorycb.Text) && lc.verifyAuthor(dt2, authorcb.Text))
{
int catid = lc.addBookcategory(categorycb.Text);
MessageBox.Show(lc.addBook(titletb.Text, catid.ToString(), authorcb.SelectedValue.ToString(), int.Parse(pricetb.Text), int.Parse(qtytb.Text)));
}
else if (lc.verifyCategory(dt1, categorycb.Text) && !lc.verifyAuthor(dt2, authorcb.Text))
{
int authid = lc.addBookauthor(authorcb.Text);
MessageBox.Show(lc.addBook(titletb.Text, categorycb.SelectedValue.ToString(), authid.ToString(), int.Parse(pricetb.Text), int.Parse(qtytb.Text)));
}
else if (!lc.verifyCategory(dt1, categorycb.Text) && !lc.verifyAuthor(dt2, authorcb.Text))
{
int catid = lc.addBookcategory(categorycb.Text);
int authid = lc.addBookauthor(authorcb.Text);
MessageBox.Show(lc.addBook(titletb.Text, catid.ToString(), authid.ToString(), int.Parse(pricetb.Text), int.Parse(qtytb.Text)));
}
}
else
{
MessageBox.Show("Please enter all details", "Error");
}
}