public void dtg_Hocky_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            frm_capnhat frm = new frm_capnhat();
            var         r   = dtg_Hocky.Rows[e.RowIndex];

            frm.txt_id.Text = r.Cells[0].Value.ToString();
            frm.txt_hk.Text = r.Cells[1].Value.ToString();
            frm.txt_hp.Text = r.Cells[2].Value.ToString();
            frm.ckb_km.Text = r.Cells[3].Value.ToString();
        }
        private void btn_capnhat_Click(object sender, EventArgs e)
        {
            frm_capnhat frm = new frm_capnhat();

            frm.txt_id.Text = dtg_Hocky.CurrentRow.Cells[0].Value.ToString();
            frm.txt_hk.Text = dtg_Hocky.CurrentRow.Cells[1].Value.ToString();
            frm.txt_hp.Text = dtg_Hocky.CurrentRow.Cells[2].Value.ToString();
            if (dtg_Hocky.CurrentRow.Cells[3].Value.ToString() == "false")
            {
                frm.ckb_km.CheckState = CheckState.Unchecked;
            }
            else if (dtg_Hocky.CurrentRow.Cells[3].Value.ToString() == "true")
            {
                frm.ckb_km.CheckState = CheckState.Checked;
            }
            if (frm.ShowDialog() == DialogResult.OK)
            {
                frm.Close();
            }
            var hk = hk_ctl.GetAllHK();

            UpdateDtg(hk);
        }