title: Open popup by imagebutton click on GridView
body: <p>I have GridView(id: gv_test) with two columns:</p>
  <blockquote>
  <p>itemId</p>
  <p>ImageButton (id: ImageBTN)</p>
  </blockquote>
  <pre><code>&lt;asp:ImageButton ID=&quot;ImageBTN&quot; Width=&quot;34px&quot; Height=&quot;34px&quot; ImageUrl=&quot;~/bla/bla.png&quot; OnClick=&quot;ImageBTN_Click&quot;  runat=&quot;server&quot; CommandName=&quot;Select&quot; Text=&quot;PopUp&quot;&gt; &lt;/asp:ImageButton&gt; 
  </code></pre>
  <p>As you see, i tried somthing with OnRowCommand and with OnRowDataBound by using CommandName.. but without success, even not close.</p>
  <p>The itemId get his value from sql table.</p>
  <p>what i'm want to do - when the user click on the ImageButton - will open a popup with the link: test.aspx?id=itemId.</p>
  <p>How i can to do that by c# (OnClick event).</p>