datatable自动增加序号

{"targets": [0],"visible": true,"render": function (data, type, full, meta) {var id = full.id;if (id) {return meta.row + 1+ meta.settings._iDisplayStart;} else {return '';}}
},

　　

此方法有点小bug,推荐用下面的方法。

 var table = $('#myTable').DataTable({"ajax": "data.txt","pageLength": 5,"columnDefs": [{"searchable": false,"orderable": false,"targets": 0  //序号列不能排序也不能搜索}],"columns": [{ data:  null},{ data: 'name'},{ data: 'birthday'}],"order": [[ 1, 'asc' ]]  //默认按姓名列排序});//自动给第一列设置行号table.on('order.dt search.dt', function () {table.column(0, {search:'applied', order:'applied'}).nodes().each(function (cell, i) {cell.innerHTML = i+1;});}).draw();