how to concatenate text with navigate url property?

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My below hyperlink control is working fine with the code.. only what i want is to add page23.aspx?cat=shoes in front of the navigate url property. i am trying but when i do like this it doesn't add area with navigateurl.. it shows full text instead of retreving area from database..

C#

<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl= '<%# DataBinder.Eval(Container.DataItem, "area") %>'> <%# DataBinder.Eval(Container.DataItem, "area") %>

Posted 3-Oct-13 8:15am

Harpreet_125

Updated 3-Oct-13 8:31am

Sampath Lokuge

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Azee 3-Oct-13 14:43pm

Give an example of the output you are expecting after combining page23.aspx?cat=shoes with navigateURL and please specify what does "area" field return?

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Ajay_Saini · Accepted Answer · 2013-10-03T15:17:00

XML

you should try java script for that hope your problem will resolve. i have give a sample please check and modify as per your requirement
the javascript code is as :

<script type="text/javascript">
        function openWindowForNavigation() {
            // getting the current url with query string
            var query = document.location.href;
            window.open(query +'&cat='+50);
        }
    </script>

and your hyperlink is
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="javascript:openWindowForNavigation();">HyperLink