protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
int bookId = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0]);
var id = ctx.Books.Where(x => x.BookID == bookId).FirstOrDefault();
ctx.Books.Remove(id);
ctx.SaveChanges();
BindGrid();
}
protected void btnUpdate_Click(object sender, EventArgs e)
{
int id = Convert.ToInt32(tbxBookID.Text);
var updateBook = ctx.Books.SingleOrDefault(x => x.BookID == id);
if (updateBook != null)
{
updateBook.BookID = int.Parse(tbxBookID.Text);
updateBook.CategoryID = int.Parse(ddlBookCategory.SelectedValue);
updateBook.ISBN = tbxISBN.Text;
updateBook.Price = Convert.ToDecimal(tbxPrice.Text);
updateBook.Stock = int.Parse(tbxStock.Text);
updateBook.Title = tbxBookTitle.Text;
updateBook.Author = tbxAuthor.Text;
}
ctx.Books.AddOrUpdate(updateBook);
ctx.SaveChanges();
Response.Redirect("BookSummaries.aspx");
}