First of all i suggest you to the KB article: How to select rows via an unbound checkbox column. Starting with version 13.2, the GridView in the XtraGrid control provides a built-in checkbox column for multiple row selection.
Is there a minimum age to raft or upper age limit? A. 7-years-old for the Classic and 12-years-old for the Challenge. While there is no upper age-limit, we expect everyone to reasonably evaluate his or her fitness level before taking a whitewater rafting trip.
PWC operators 13 years of age must have either someone at least 21 years old on board, or a Watercraft Operator's Permit and be under visual supervision by someone at least 21 years old. PWC operators 14 to 17 years of age must have either someone at least 21 years old on board, or a Watercraft Operator's Permit.