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var table = $('#mydt').DataTable(); var columns = table.context[0].aoColumns; var columnslen = table.context[0].aoColumns.length;

data": null in a columns definitions maybe solve issue

the state of multiple columns, I would suggest using

GET, $sql_details, $table, $primaryKey, $columns ) And you simply wanted

can I restrict which columns are editable in the

table with search, pagination, columns and bubble editing and

lengthChange: false, ajax: "/api/Student", columns: [{ data: "Name" }] }); var tableTools

autowidth: "false", ajax: "lib/getAppointments.php?id="+GetURLParameter("id")+"&uid="+uid+"&t=c", columns: [ {data: "Appointments.AppointmentDate"}, {data: "StatusOptions.Status",

example column with checkboxes: "columns" : [ { "data" : row[0], "render" : function(data , type , row){ return '<input class="ch" type="checkbox" value='+data+' />' } } ], and script which counts selected checkboxes $(document).ready(function (){ $('body').on('change' , '.ch' , function(){ var checked = 0 $('.ch:checked').each(function (){ checked = checked +1 console.log(checked) $('.info').text(checked + " rows are selected") }) }) })

For example: "columns": [ { "class" : "class001", // or "className" : "class001" - the same result "data" : 'name', }, { "data" : "score" }, ], other way: yourDataTable.on( 'draw', function () { $('tr td:nth-child(6)').each(function (){ $(this).addClass('class001') }) }); But first way is simpler