private void AddOperationComboBox()
{
var items = GridComboItem.CreateForEnum <GroupOperation>().ToList();
var cmn = Adapter.GetColumn(f => f.GroupOperation);
Adapter.AddComboBox(cmn, items);
}
private void BuildStringOperationList()
{
var operations = new[] { GroupOperation.Max, GroupOperation.Min, GroupOperation.Mode };
_stringOperations = GridComboItem.CreateForEnum(operations).ToList();
}