Hi,
Please refer this thread that has a sample that does what you are trying to do.
http://www.syncfusion.com/support/forums/message.aspx?MessageID=39624
You can also selectively disable certain columns. Refer this sample too.
http://www.syncfusion.com/support/forums/message.aspx?MessageID=38838
There is also a KB article related to these, please refer for more information.
In a GridGroupingControl, how do I conditionally set the style of a row depending upon values in the row?
Best regards,
Stanley