Passing extra parameters with dataTable.net plugin while server paging is enabled in asp.net MVC 3 and Web form

Recently I have added two posts to implement dataTable.net jQuery plugin with server side paging with MVC3 and asp.net web form. First one is in MVC 3 and second one is in web form. We can find these two posts here-

http://growingtech.blogspot.in/2012/06/ajax-data-paging-with-datatablesnet.html
http://growingtech.blogspot.in/2012/06/ajax-data-paging-with-datatablesnet_06.html

I will request to study these two posts in sequentially to understand this one.

In this post we will be discussing how to pass additional parameters when page index changes happen in dataTable.net. To pass additional parameters in ajax paging we can use fnServerParams function of dataTable. In the MVC post we have discussed how dataTable plugin adds request parameters as querystring. And this function (fnServerParams) provides an input parameter which is nothing but an array of the query string parameters. We can do modification to the array in the function to accomodiate our need of extra parameters. Each array element in the input array is an object of the following form-

{ "name": "name of parameter/querystring", "value": "value of parameter/querystring " }

So, we can add our additional parameter accordingly. Suppose we have following input data as additional parameter-

First Criteria: <input id="txtParameter1" /><br />
Second Criteria : <input id="txtParameter2" />

We can add the these extra parameter like below-

<script type="text/javascript" charset="utf-8">
    $(document).ready(function () {
        $('#example').dataTable({
            "bServerSide": true,
            "bProcessing": true,
            "sPaginationType": "full_numbers",
            "sAjaxSource": 'Datatable Plugin Pagination Issue AjaxPath.aspx',
            "fnServerParams": function (aoData) {
                aoData.push(
                    { "name": "firstcriteria", "value": $("#txtParameter1").val() },
                    { "name": "secondcriteria", "value": $("#txtParameter2").val() }
                );
            }
        });
    });
</script>

In web form:

In web form we can access these parameters like below and use for database operations –

var firstCriteria = Request.QueryString["firstcriteria"];
var secondCriteria = Request.QueryString["secondcriteria"];

In MVC 3-

To use in MVC 3 we can modify data model like below to accommodate our new parameters-

    public class TableParameter
    {
        public string sEcho { get; set; }
        public int iDisplayStart { get; set; }
        public int iDisplayLength { get; set; }
        public string firstcriteria { get; set; }
        public string secondcriteria { get; set; }
    }

Input data will be available in the controller method to use.