protected void cmdBuscar_Click(object sender, EventArgs e) { try { AlunoDTO dto = new AlunoDTO(); if (txtAno.Text.Length > 0) { dto.ano = int.Parse(txtAno.Text); } dto.situacao = cmbSituacao.SelectedValue.ToString(); AlunoBRL brl = new AlunoBRL(); grdAluno.DataSource = brl.searchAlunosCompraDevices(dto); grdAluno.DataBind(); } catch (Exception ex) { throw ex; } }