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Dynamic gallery using ListView and AJAX

Posted By:      Posted Date: August 26, 2010    Points: 0   Category :ASP.Net

I want to create a gallery where on top there will be a normal view of a selected image and below a horizontal listview in order to select an image. Both in separate ajax update panels.

When i debug i get the following error "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index" and highlights the "ImageButton imgbtn =(ImageButton)ListView1.Items[ListView1.SelectedIndex].FindControl("ImageButton2");" of my code behind file

Can anyone help me? Thank you in advance!

Here is my code:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server

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