public function excelkegiatan()
    {
        $kegiatan = DB::table('kegiatan')->get();

        $kegData = "";

        if(count($kegiatan) >0 ){
            $kegData .= '<table>
            <tr>
            <th style="border:1px solid #000; background-color:#255255255;">No</th>
            <th style="border:1px solid #000; background-color:#255255255;">Kegiatan</th>
            <th style="border:1px solid #000; background-color:#255255255;">Tahun</th>
            </tr>';

            foreach ($kegiatan as $kegiatan) {
                $kegData .= '
                <tr>
                <td style="border:1px solid #000; background-color:#255255255">'.$kegiatan->id_kegiatan.'</td>
                <td style="border:1px solid #000; background-color:#255255255">'.$kegiatan->nama_kegiatan.'</td>
                <td style="border:1px solid #000; background-color:#255255255">'.$kegiatan->tahun_kegiatan.'</td>
                </tr>';
            }
            $kegData .='</table>';
        }

        header('Content-Type: application/xls');
        header('Content-Disposition: attachment; filename=kegiatan.xls');
        echo $kegData;
    }