protected void gvDSLinhVuc_RowDeleting(object sender, GridViewDeleteEventArgs e)
 {
     LinhVucKinhDoanhDAO lvdao = new LinhVucKinhDoanhDAO();
     int autoid = int.Parse(gvDSLinhVuc.DataKeys[e.RowIndex].Value.ToString());
     lvdao.XoaLinhVuc(autoid);
     HienThiDanhSach();
 }
 protected void btnThem_Click(object sender, EventArgs e)
 {
     LinhVucKinhDoanhDAO lvdao = new LinhVucKinhDoanhDAO();
     string ten = txtLinhVuc.Text;
     lvdao.ThemLinhVuc(ten);
     HienThiDanhSach();
     txtLinhVuc.Text = "";
 }
        protected void gvDSLinhVuc_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            GridViewRow row = gvDSLinhVuc.Rows[e.RowIndex];

            TextBox txt2nd_column = row.Cells[1].Controls[0] as TextBox;

            int a = Int32.Parse(gvDSLinhVuc.DataKeys[e.RowIndex].Value.ToString());
            string b = txt2nd_column.Text;

            LinhVucKinhDoanhDAO lvdao = new LinhVucKinhDoanhDAO();
            lvdao.SuaLinhVuc(a, b);

            e.Cancel = true;
            gvDSLinhVuc.EditIndex = -1;
            HienThiDanhSach();
        }
 protected void HienThiDanhSach()
 {
     LinhVucKinhDoanhDAO lvdao = new LinhVucKinhDoanhDAO();
     gvDSLinhVuc.DataSource = lvdao.DSLinhVucKinhDoanh();
     gvDSLinhVuc.DataBind();
 }