// Delete button event private void timeslotDelete_Click(object sender, EventArgs e) { a.timeslotentryId = Convert.ToInt32(timeslotentryId.Text); bool success = a.Delete(a); if (success == true) { MessageBox.Show("Successfully Deleted"); } else { MessageBox.Show("no"); } //Load data to griedview DataTable dta = a.Select(); timeslotgriedview.DataSource = dta; timeslotclear(); }