客戶端用DBGrid進行數據編輯，當ApplyUpdates時，會將有變化的數據傳給應用服務器，在DataSetProvider的onUpdateData中，怎樣知道DataSet中的哪一筆是新增，哪一筆是修改，哪一筆是刪除?

procedure TDBClientTest.ProviderUpdateData(Sender: TObject; DataSet: TCustomClientDataSet); begin with DataSet do while not EOF do begin if UpdateStatus = usDeleted then LogDelete(DataSet, UserName, Date, Time); Next; end; end; UpdateStatus 是現在那筆記錄的 Update 狀況，有以下值 : usUnmodified The current record has no unapplied updates. usModified The current record has unapplied modifications. usInserted The current record has been inserted but the insertion was not applied. usDeleted The current record represents a deleted record, where the deletion has not yet been applied.