datagridView con filtros

private void txtDescripcion_TextChanged(object sender, EventArgs e)

        {

            string fieldName = string.Concat("[", dt.Columns[1].ColumnName,"]");

            dt.DefaultView.Sort = fieldName;

            DataView view = dt.DefaultView;

            view.RowFilter = string.Empty;

            if (txtDescripcion.Text != string.Empty)

                view.RowFilter = fieldName + " LIKE '%" + txtDescripcion.Text + "%'";

            dgvCliente.DataSource = view;

        }