protected void cargarConceptosInsertar()
    {
        DataSet ds = MasterBD.listarConceptoInsertar(Convert.ToInt32(rblTipoConcepto.SelectedValue));

        ddlConcepto.DataSource     = ds;
        ddlConcepto.DataValueField = "id_concepto";
        ddlConcepto.DataTextField  = "nombre";
        ddlConcepto.DataBind();
    }