public static int GetDataRowCount(this ASPxGridView source)
        {
            var smartDataSource = source.DataSource as ISmartDataSourse;

            if (smartDataSource != null)
            {
                return(smartDataSource.Count);
            }


            if (source.IsGrouped())
            {
                var result = 0;

                for (var index = 0; index < source.VisibleRowCount; index++)
                {
                    if (source.IsGroupRow(index))
                    {
                        if (source.IsRowExpanded(index) == false)
                        {
                            var keys = (source.DataBoundProxy).GetChildKeysRecursive(index);

                            result += keys.Cast <object>().Count(x => x != null);
                        }
                    }
                    else
                    {
                        result++;
                    }
                }

                return(result);
            }


            return(source.VisibleRowCount);
        }