private void btnThem_Click(object sender, EventArgs e)
        {
            frmThemSuaSanPham frm = new frmThemSuaSanPham();

            frm.themSanPham += XuLyThemSanPham;
            frm.ShowDialog();
        }
 private void dgvSanPham_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
 {
     if (dgvSanPham.SelectedRows[0].Index != -1)
     {
         string            strMaSP = dgvSanPham.SelectedRows[0].Cells["colMaSP"].Value.ToString();
         frmThemSuaSanPham frm     = new frmThemSuaSanPham(strMaSP);
         frm.ShowDialog();
     }
 }
 private void btnSua_Click(object sender, EventArgs e)
 {
     if (dgvSanPham.SelectedRows[0].Index != -1)
     {
         string            strMaSP = dgvSanPham.SelectedRows[0].Cells["colMaSP"].Value.ToString();
         frmThemSuaSanPham frm     = new frmThemSuaSanPham(strMaSP);
         frm.suaSanPham += XuLySuaSanPham;
         frm.ShowDialog();
     }
 }