How to close Popup dialog in code behind?
<p><a href="http://i.stack.imgur.com/M71Xp.png" rel="nofollow">Popup dialog</a></p>

<p>My purpose of closing this popup dialog is when some filters in my page was changed this popup dialog is no longer relevant so I wanted to close it under my List item SelectedIndexChanged event but I could find any solution yet. Although user can just click the close button but It would be better if it can be done in code.</p>

<p>Glad if you can help. Thanks</p>