private void dgv_AllSach_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
{
int id = int.Parse(dgv_AllKM.Rows[e.RowIndex].Cells[0].Value.ToString());
Makm = id;
txt_MaKM.Text = id.ToString();
txt_TenKM.Text = dgv_AllKM.Rows[e.RowIndex].Cells[1].Value.ToString();
dtp_NgBatDauKM.Value = DateTime.Parse(dgv_AllKM.Rows[e.RowIndex].Cells[2].Value.ToString());
dtp_NgKetThucKM.Value = DateTime.Parse(dgv_AllKM.Rows[e.RowIndex].Cells[3].Value.ToString());
dgv_CTKM.DataSource = ChiTietKMBLL.getCTKM(id).DataSource;
btn_ThemSachKM.Enabled = false;
}
public void loadCTKM()
{
dgv_CTKM.DataSource = null;
dgv_CTKM.DataSource = ChiTietKMBLL.getCTKM(Makm).DataSource;
}