Basic Rendering

I am using the basic rendering, I can see the json object using the debugger line but I get an error of "error no length"

Please help

JS

    $(document).ready(function () {

       var table = $('#myTable').DataTable({
            "ajax": '/Home/GetData'
        });

        table.on( 'xhr', function () {
            var json = table.ajax.json();
            debugger;
            alert( json );
        });

    } );

Json response

{
  "Item1": [
    {
      "RequestId": 10938,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548201040)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11021,
      "ResponseId": 0,
      "EntityDisplayName": "Project",
      "UserName": null
    },
    {
      "RequestId": 10939,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548383413)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11022,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location",
      "UserName": null
    },
    {
      "RequestId": 10940,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548384323)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11023,
      "ResponseId": 0,
      "EntityDisplayName": "Piezometer",
      "UserName": null
    },
    {
      "RequestId": 10941,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548384667)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11024,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location Detail",
      "UserName": null
    },
    {
      "RequestId": 10942,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548384883)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11025,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location",
      "UserName": null
    },
    {
      "RequestId": 10943,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548385080)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11026,
      "ResponseId": 0,
      "EntityDisplayName": "Piezometer",
      "UserName": null
    },
    {
      "RequestId": 10944,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548385367)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11027,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location Detail",
      "UserName": null
    },
    {
      "RequestId": 10945,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548385583)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11028,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location",
      "UserName": null
    },
    {
      "RequestId": 10946,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548385760)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11029,
      "ResponseId": 0,
      "EntityDisplayName": "Piezometer",
      "UserName": null
    },
    {
      "RequestId": 10947,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548386050)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11030,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location Detail",
      "UserName": null
    },
    {
      "RequestId": 10948,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548386273)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11031,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location",
      "UserName": null
    },
    {
      "RequestId": 10949,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548386500)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11032,
      "ResponseId": 0,
      "EntityDisplayName": "Piezometer",
      "UserName": null
    },
    {
      "RequestId": 10950,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548386820)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11033,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location Detail",
      "UserName": null
    },
    {
      "RequestId": 10951,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548387023)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11034,
      "ResponseId": 0,
      "EntityDisplayName": "Sample Location",
      "UserName": null
    },
    {
      "RequestId": 10952,
      "RequestTypeId": 1,
      "RequestUserId": 0,
      "RequestDateTime": "\/Date(1385548387217)\/",
      "RequestComment": "Created by the Data Integration Toolkit.",
      "EntityInstanceId": 11035,
      "ResponseId": 0,
      "EntityDisplayName": "Piezometer",
      "UserName": null
    }
  ],
  "Item2": true
}

Edited by Allan - Syntax highlighting. Details on how to highlight code using markdown can be found in this guide.