protected void cargarConceptosInsertar() { DataSet ds = MasterBD.listarConceptoInsertar(Convert.ToInt32(rblTipoConcepto.SelectedValue)); ddlConcepto.DataSource = ds; ddlConcepto.DataValueField = "id_concepto"; ddlConcepto.DataTextField = "nombre"; ddlConcepto.DataBind(); }