如何在不使用TableTool的情况下从jquery数据表中获取选定的行索引

Question

I need to get the row id or index of user selected rows from jquery datatables without using the TableTool. Once I get the indexes or the Ids, I will use them to select these rows after the user comes back to the same page. How do I get the row Id or index of the select rows? Many thanks !

JSP code:

 // when a row is selected, I want to get the row id or index
 $('#userTable tbody tr').on('click', function() 
 {
       var oTable = $('#userTable').dataTable();
       var data = oTable.fnGetData(this);
       selectedRowId = data[4]; 
       alert(selectedRowId); // this printed "undefined"

       var rowIndex = oTable.row(this).index();
       alert(rowIndex);  // this alert didn't even get invoked.
  });

Answer 1

var rowIndex = oTable.row(this).index();

The above will work but you have to use:

 var oTable = $('#userTable').DataTable();

which will return the API and should allow you to use row(this).index()

Instead Of:

 var oTable = $('#userTable').dataTable();

However without seeing a working copy of the code (JSFiddle maybe) I am unsure why the fnGetData() is not working.