title: How to display Gridview data based on Dropdown selection that exists on the Gridview itself?
body: <p>I have data similar to </p>
  
  <p><strong>PLAN &nbsp;&nbsp;&nbsp;OPTION&nbsp;&nbsp;&nbsp;VALUE</strong><br/>
  Plan1 &nbsp;&nbsp;&nbsp;option1 &nbsp;&nbsp;&nbsp;10<br/>
  Plan1 &nbsp;&nbsp;&nbsp;option2 &nbsp;&nbsp;&nbsp;20<br/>
  Plan2 &nbsp;&nbsp;&nbsp;option1 &nbsp;&nbsp;&nbsp;50<br/>
  Plan2 &nbsp;&nbsp;&nbsp;option2 &nbsp;&nbsp;&nbsp;70<br/>
  Plan3 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;99</p>
  
  <p>I want a GridView to group similar Plans and have a dropdown showing the Options. Selecting an option will show a different value in the third column.</p>
  
  <p>Plan &nbsp;&nbsp;| &nbsp;&nbsp;dropdown with [option1] and [option2])   &nbsp;&nbsp;|&nbsp;&nbsp; the value driven by the dropdown selection.</p>
  
  <p>What's the best way to do this ?</p>
  
  <p>I hope I was clear.
  Thanks!</p>