how get data in row selected?

roscez

I'm have my grid :

 $.fn.dataTable.ext.legacy.ajax = true;
        var grid = $("#gridgroup").dataTable({
            "language": {
                "url": "/Scripts/Libs/DataTables/ptBr.txt"
            },
            "processing": true,
            "serverSide": true,
            "ajax": "/groups/data",
            "order": [[0, "desc"]],
            "columns": [
                { "data": "Id" },
                { "data": "Nome", },
                { "data": "Descricao" }
            ],
        });
        //select row
        $('#gridgroup tbody').on('click', 'tr', function () {
            if ($(this).hasClass('row_selected')) {
                $(this).removeClass('row_selected');
            }
            else {
                grid.$('tr.row_selected').removeClass('row_selected');
                $(this).addClass('row_selected');
            }
        });