GridView with SqlDataSource inside ASP.Net AJAX Modal Popup

I am using one textbox and button.

http://www.aspsnippets.com/Articles/Display-Show-GridView-inside-jQuery-Dialog-Modal-Popup-Window-in-ASPNet-using-C-and-VBNet.aspx

In SqlDataSource ( <asp:ControlParameter>) i adding the value and based on that id i'm binding the gridview, bur it returns empty gridview in the modal popup window.

below is the code aatched for your reference

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    
 <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/jquery-ui.js" type="text/javascript"></script>
<link href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.9/themes/start/jquery-ui.css"
    rel="stylesheet" type="text/css" />
<script type="text/javascript">
    $(function () {
        $("[id*=btnShowPopup]").click(function () {
           
            ShowPopup();
            return false;
        });
    });
    function ShowPopup() {
        $("#dialog").dialog({
            title: "Patient Histroy ",
            width: 1220,
           
            buttons: {
                Ok: function () {
                
                    $(this).dialog('close');
                }
            },
            modal: true
        });
    }
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
     <asp:TextBox ID="TextBox1" runat="server"  ></asp:TextBox>
      <asp:Label ID="userid" runat="server" Visible="false"></asp:Label>
    <asp:Button ID="btnShowPopup" runat="server" Text="Show Popup" />
<div id="dialog" style="display: none">
    <asp:GridView ID="GridView1" Width="1200px" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" OnPageIndexChanging="OnPageIndexChanging"
        PageSize="1" AllowPaging="True">
        <Columns>
            <asp:BoundField DataField="StudentNumber" HeaderText="Student Number"   SortExpression="StudentNumber" />
            <asp:BoundField DataField="StudentName" HeaderText="Student Name"  SortExpression="StudentName" />
            <asp:BoundField DataField="StudentKind" HeaderText="Student Kind"  SortExpression="StudentKind" />
            <asp:BoundField DataField="FromDate" HeaderText="From Date" ItemStyle-Width="70" DataFormatString="{0:dd-M-yyyy}"  SortExpression="FromDate" />
            <asp:BoundField DataField="ToDate" HeaderText="To Date" ItemStyle-Width="80" DataFormatString="{0:dd-M-yyyy}"  SortExpression="ToDate" />
            <asp:BoundField DataField="NumberofDays" HeaderText="Days"  SortExpression="NumberofDays" />
            <asp:BoundField DataField="DoctorDesc" HeaderText="Doctor Desc"  SortExpression="DoctorDesc" />
            <asp:BoundField DataField="DoctoName" HeaderText="Doctor Name"    SortExpression="DoctoName" />
            <asp:BoundField DataField="Hospital_Name" HeaderText="Hospital Name"   SortExpression="Hospital_Name" />
            <asp:BoundField DataField="Transfer_Reason" HeaderText="Transfer Reason"   SortExpression="Transfer_Reason" />
            <asp:BoundField DataField="Room_number" HeaderText="Room number" SortExpression="Room_number" />
            <asp:BoundField DataField="Sleeping_Reason" HeaderText="Sleeping Reason"   SortExpression="Sleeping_Reason" />
            <asp:BoundField DataField="Bed_number" HeaderText="Bed number"   SortExpression="Bed_number" />
        </Columns>
    </asp:GridView>
</div> 
    <asp:SqlDataSource ID="SqlDataSource1"  runat="server" ConnectionString="<%$ ConnectionStrings:MajedClinic-ConnectionString %>" 
        SelectCommand="SELECT [StudentNumber], [StudentName], [StudentKind], [FromDate], [ToDate], [NumberofDays], [DoctorDesc], [DoctoName], [Hospital_Name], [Transfer_Reason], [Room_number], [Sleeping_Reason], [Bed_number] FROM [Student_details] WHERE ([StudentID] = @StudentID)">
        <SelectParameters>
            <asp:ControlParameter ControlID="TextBox1"  Name="StudentID" PropertyName="Text" Type="String"   />
        </SelectParameters>
    </asp:SqlDataSource>
   

    
    
</asp:Content>