ASP.Net GridView inside GridView (Nested GridView) Auto Collapse others when on expanded

Hi

Could you please help me.

while surfing code I had seen your Application Grid inside Grid.

http://www.aspsnippets.com/Articles/Gridview-inside-Gridview-in-ASPNet-using-C-and-VBNet.aspx

I need the Grid inside Gridwith enable first + symbol when click on second one first one should be hide

Thanks in advance

janardhanB