How to access telerik controls from telerik radgrid
<p>How to access telerik control that is RadAsyncUpload from below radgrid. I have below code in aspx page. During page load I need to disable telerik controls on some condition. How can I disable telerik controls from below code?</p>

<pre><code>&lt;telerik:RadGrid ID="RadGrid1"
                 runat="server"
                 AutoGenerateColumns="False"
                 GridLines="None"
                 Skin="Black" 
                 Width="750px"
                 Height="320px"&gt;
  &lt;PagerStyle Mode="NextPrevAndNumeric" /&gt;
  &lt;SelectedItemStyle CssClass="SelectedItem"/&gt;                        
  &lt;MasterTableView EditMode="InPlace"
                   CommandItemDisplay="None"
                   AllowFilteringByColumn="True"
                   DataKeyNames="FileName"&gt;
    &lt;Columns&gt;
      &lt;telerik:GridBoundColumn ReadOnly="true"
                               DataField="FileName"
                               UniqueName="FileName"
                               AllowFiltering="false"
                               ItemStyle-Width="200px"
                               HeaderStyle-Width="205px"
                               HeaderStyle-HorizontalAlign="Left"
                               ItemStyle-HorizontalAlign="Left"
                               ItemStyle-BackColor="Gray"&gt;
      &lt;/telerik:GridBoundColumn&gt; 
      &lt;telerik:GridTemplateColumn UniqueName="FilePath"
                                  Visible="true"
                                  ItemStyle-Width="310px"
                                  HeaderStyle-Width="355px"
                                  HeaderStyle-HorizontalAlign="Left"
                                  ItemStyle-HorizontalAlign="Left"
                                  AllowFiltering="false"
                                  ItemStyle-BackColor="Gray"&gt;
        &lt;ItemTemplate&gt;                                        
          &lt;telerik:RadAsyncUpload runat="server" ID="RadUpload1"&gt;
          &lt;/telerik:RadAsyncUpload&gt;
        &lt;/ItemTemplate&gt;
      &lt;/telerik:GridTemplateColumn&gt;
    &lt;/Columns&gt;
  &lt;/MasterTableView&gt;
&lt;/telerik:RadGrid&gt;
</code></pre>
