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Как в UniDBTreeGrid посчитать сумму или разность в ветке?


dbf_usr

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Как в компонентах типа UniDBVerticalTreeGrid или UniDBTreeGrid посчитать сумму или разность в ветке?

У них нет свойств Summary, нет событий типа ColumnSummary.

Всем за ранее благодарен за ответ.

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