Bind data to jqgrid using WebMethod in asp.net

We need add following pre-defined jquery plugins and css files to web form.Compare to asp.net Gridview,Jquery grid performance is past and lightweight.
As well as add Newtonsoft.json.dll

Code in jqGridWebMethod.aspx   

    <script src="JQGridReq/grid.locale-en.js"></script>

    <script src="JQGridReq/jquery-1.9.0.min.js"></script>

    <link href="JQGridReq/jquery-ui-1.9.2.custom.css" rel="stylesheet" />

    <script src="JQGridReq/jquery.jqGrid.js"></script>

    <link href="JQGridReq/ui.jqgrid.css" rel="stylesheet" />

    <script type="text/javascript">

        $(document).ready(function () {

            $.ajax({

                type: "POST",

                contentType: "application/json",

                data: "{}",

                url: "jqGridWebMethod.aspx/getEmployee",

                dataType: "json",

                success: function (data) {

                    data = data.d;

                    $("#list").jqGrid({

                        datatype: "local",

                        colNames: ['IdentityNumber', 'FirstName', 'Email', 'SurName',

                        'Password', 'BirthDate', 'Gender'],

                        colModel: [

                           { name: 'IdentityNumber', index: 'IdentityNumber', width:100},

                           {name: 'FirstName', index: 'FirstName', width: 100},

                           {name: 'Email', index: 'Email', width: 100},

                           {name: 'SurName', index: 'SurName', width: 100},

                           { name: 'Password', index: 'Password', width: 100},

                           {name: 'BirthDate', index: 'BirthDate', width: 100},

                           {name: 'Gender', index: 'Gender', width: 80}

                        ],

                        data: JSON.parse(data),

                        caption: "Employee Data"

                    });

                }

            });

        });
<table id="list"></table>

Code in jqGridWebMethod.aspx.cs

[WebMethod]
 public static string getEmployee()

    {

        SqlConnection con = new SqlConnection("Data Source=SHANKAR\\SQLEXPRESS;Initial

        Catalog=SMPL;Persist Security Info=True;User ID=sa;Password=hits@123");

        SqlCommand cmd = new SqlCommand();

        cmd.CommandText = "SELECT

        IdentityNumber,FirstName,SurName,Email,[Password],BirthDate,Gender FROM   

        dbo.tbl_Registration";

        cmd.CommandType = CommandType.Text;

        cmd.Connection = con;

        con.Open();

        SqlDataAdapter da = new SqlDataAdapter(cmd);

        con.Close();

        DataSet ds = new DataSet();

        da.Fill(ds);

        return Newtonsoft.Json.JsonConvert.SerializeObject(ds.Tables[0]);

    }
Final output could be