How to validate WebUser Control inside Page
<p>I have a web user control inside my page. In the web user control I have a radio button list and a required field validator to check whether any of the radio buttons are clicked or not. However, on the main page I have a button which, when clicked, should check the validation. I don't know how to do that.</p>

<p>Here is the structure:</p>

<pre><code>Page -&gt; usercontrol -&gt; radiobuttonList
  |
  |-&gt;  button 
</code></pre>

<p>When the button is clicked, I would like the web user control radiobuttonlist validator to perform its validations and set Page.IsValid accordingly.</p>
