public void addbooklogic(bookDto obj)
{
bookDto bobj = new bookDto();
bobj.author = obj.author;
bobj.book_id = obj.book_id;
bobj.book_name = obj.book_name;
bobj.category = obj.category;
bobj.price = obj.price;
bobj.published_date = obj.published_date;
}
private void btn_add_book_Click(object sender, EventArgs e)
{
bookDto bobj = new bookDto();
bobj.author = txtbx_author.Text;
bobj.book_id = txtbx_book_id.Text;
bobj.book_name = txtbx_book_name.Text;
bobj.category = txtbx_category.Text;
bobj.price = Convert.ToInt32(txtbx_price.Text);
bobj.published_date = Convert.ToDateTime(txtbx_published_date.Text);
booklogic blogic = new booklogic();
blogic.addbooklogic(bobj);
}