private void buttonUpdate2_Click(object sender, EventArgs e) { c.id = int.Parse(textSearch.Text); c.yearSemester = comboYearSemester2.Text; c.programme = comboProgrammer2.Text; c.groupNumber = Convert.ToInt32(numericUpGNumber2.Value); c.subgroupNumber = Convert.ToInt32(numericSGNumber2.Value); c.groupID = textGID2.Text; c.subGroupID = textSGID2.Text; bool success = c.Update(c); if (success == true) { MessageBox.Show("Updated........."); } else { MessageBox.Show("Failed to update. Try Again..."); } DataTable dt = c.Select(); dataGridViewGroups.DataSource = dt; }