Based up on your example, I tried to append new data in the existing datatable. i am facing error like this "DataTables warning: table id=myTable - Cannot reinitialise DataTable". Could you able to advice for this error.
$('#myTable').DataTable({ data: JsonString, columns: [{title: "Travelagentid"},{title: "Datetime"},{title: "Openingbalance"},{title: "Totaldebit"},{title: "Totalcredit"},{title: "Closingbalance"}] });