void edit() { int id = Int32.Parse(datagridview2.SelectedCells[0].OwningRow.Cells["id"].Value.ToString()); hocsinh hs = db.hocsinhs.Find(id); hs.lop = cblophs.Text; hs.ngaysinh = dateTimePicker1.Value; db.SaveChanges(); }
void delete() { try { int idhs = Int32.Parse(txtid.Text); hocsinh hs = db.hocsinhs.Where(p => p.id == idhs).SingleOrDefault(); db.hocsinhs.Remove(hs); db.SaveChanges(); } catch { } }
void addhs() { DateTime date = dateTimePicker1.Value; string lophoc = cblophs.Text; string tenhocsinh = txthocsinh.Text; hocsinh hs = new hocsinh() { tenhs = tenhocsinh, lop = lophoc, ngaysinh = date }; db.hocsinhs.Add(hs); db.SaveChanges(); }