taking query string values without full postback
<p>i have a page in which the left column contains category list and the right column will display the corresponding items on choosing a particular category from the left</p>

<p>each category list contains a hyperlink whose navigate url contains query string values.</p>

<p>on clicking the link i get the items listed in the right matching the querystring value</p>

<p>question is: i want to prevent the full postback and at the same time to catch the querystring values to without which i wont be able to get the items list in the right.</p>

<p>i used an update panel but the full post back is happening again.</p>

<p>is there any way to get query string values without full postback??? </p>

<pre><code>&lt;asp:UpdatePanel ID="UpdatePanel1" runat="server"&gt;
    &lt;ContentTemplate&gt;

    &lt;div class="rightsec"&gt;

    &lt;h5&gt;Categories&lt;/h5&gt;
        &lt;asp:Accordion ID="Accordion1" runat="server"&gt;
            &lt;Panes&gt;
                &lt;asp:AccordionPane ID="AccordionPane1" runat="server"&gt;
                    &lt;Header&gt;
                        &lt;h4&gt;
                            Electronics&lt;/h4&gt;
                    &lt;/Header&gt;
                    &lt;Content&gt;
                        &lt;div class="rightsec_content"&gt;
                            &lt;ul&gt;
                                &lt;li&gt;
                                      &lt;asp:HyperLink ID="HyperLink2" runat="server" NavigateUrl="show_products.aspx?category=Electronics&amp;sub_category=Cameras Accessories"&gt;Camera Accessories&lt;/asp:HyperLink&gt;   

                                &lt;/li&gt;

                             &lt;/ul&gt;
                        &lt;/div&gt;
                    &lt;/Content&gt;
                &lt;/asp:AccordionPane&gt;

        &lt;/asp:Accordion&gt;
    &lt;/div&gt;

     &lt;/ContentTemplate&gt;
    &lt;/asp:UpdatePanel&gt;


    &lt;asp:UpdateProgress ID="UpdateProgress1" runat="server" 
        AssociatedUpdatePanelID="UpdatePanel1"&gt;
    &lt;ProgressTemplate&gt;
     &lt;table align="center"&gt;
            &lt;tr&gt;
                &lt;td&gt;
                    &lt;asp:Image ID="Image1" runat="server" ImageUrl="~/staticimages/progress_bar_animated (1).gif"
                        ImageAlign="Top" /&gt;
                &lt;/td&gt;
            &lt;/tr&gt;
        &lt;/table&gt;

    &lt;/ProgressTemplate&gt;
    &lt;/asp:UpdateProgress&gt;
</code></pre>
