title: Find control of child gridview in a dropdown selected index change event
body: <p>i have a two gridview Gv1 which is parent and gv2 which is nested inside Gv1
  and i want to find the control of child gridview as well as the label which is placed inside the itemtemplate of childgridview in the selectedindexchange of dropdownlist which is placed outside the both grids</p>
  
  <p>i have used this code inside the dropdown selected index change</p>
  
  <pre><code> GridView grid_child = grv_parent.FindControl("grv") as GridView;
  
                  if (grid_child != null)
                  {
                      Label lbl_asset_type = (Label)grid_child.FindControl("lbl_asset_type");
  </code></pre>