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bind data returned from web service method to igGrid


I was having a trouble to bind data returned from a web service method even I read online samples ( I will post my issue laer on). So I decided to try another way.

though the data binding is ok. however, it doesn't do  filtering, and Paging even the features are set. The error is "Microsoft JScript runtime error: Changing the following option after the igGrid has been created is not supported: virtualization". I noticed that this error only popps up when the .ajax is called the second time. that means after the data is bound to #igGrid already.

first of all, why *.ajax is called more than once? second, is there a way to fix it?

here is my code in test.aspx file:

 <script type="text/javascript">
     $(function () {

     function getDailyTransactions() {

             type: "POST",

             url: "/Vertex/DailyTransactions.asmx/GetDailyTransactions",

             data: "{}",

             contentType: "application/json; charset=utf-8",

             dataType: "json",

             success: function (response) {

                 records = response.d;

                     virtualization: false,
                     autoGenerateColumns: true,

                     columns: [
            { headerText: "TransactionID", key: "TransactionID", dataType: "number", width: "150px" },
            { headerText: "PlanID", key: "PlanID", dataType: "number", width: "120px" },
            { headerText: "Premium", key: "Premium", dataType: "number", width: "400px" }

                     dataSource: records,

                     scrollbars: true,
                     height: '400px',
                     features: [
                name: 'Paging',
                pageSize: 5
                name: 'Sorting'
                name: 'Filtering',
                filterDropDownItemIcons: false,
                filterDropDownWidth: 200


                 $.each(records, function (index, record) {

                     $('#dailyTransaction').append('<p><strong>TransactionID: ' + record.TransactionID + '</strong><br />CustomerID: ' +
                                record.CustomerID + '<br />PlanID: ' +
                                record.PlanID + '<br /> Premium: ' +
                                record.Premium + '<br /></p>');

             failure: function (msg) {