How to add Requiredfieldvalidator control to formview itemtemplate
<p>How to add(bind) Requiredfieldvalidator control to formview itemtemplate?</p>

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<pre><code>     &lt;tr runat="server" &gt; 
         &lt;td style="width: 120px"&gt;

             &lt;asp:Label Text="Purchase Org.:" ID="LabelPurchOrg1" runat="server"&gt;  &lt;/asp:Label&gt;
       &lt;/td&gt;
        &lt;td&gt;
            &lt;orbit:Control runat="server" ID="Purch" Text='&lt;%# Eval("Site")%&gt;'                    LabelPosition="Right" CssClassLabel="SectionTextLookup"   RenderTextBoxAsLabel="true" EnableLabel="true" EnableTooltip="true" LookupCommand="sit" /&gt;

           &lt;asp:RequiredFieldValidator ID="PurchaseOrg" runat="server" ControlToValidate='&lt;%#   Eval("Site") %&gt;'   ErrorMessage="&lt;" EnableClientScript="false" Enabled="false" &gt;
        &lt;/asp:RequiredFieldValidator&gt;
      &lt;/td&gt;
  &lt;/tr&gt;
&lt;/table&gt;
&lt;/ItemTemplate&gt;
</code></pre>
