June 2010
Intermediate to advanced
900 pages
23h 11m
German
Content preview from Microsoft Access 2010 - Das Handbuch
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Datensatznavigation
Das Problem besteht nun darin, die Daten des nächsten Datensatzes zu ermitteln. Ein Recordset-Objekt heißt deswegen so, weil wirklich nur ein Datensatz (engl. recordset) im Zugriff ist. Sie haben zwar vorher eine ganze Tabelle/Abfrage geöffnet, aber Ihr Code »sieht« nur eine Zeile davon.
Datensatzzeiger bewegen
Das Recordset-Objekt kennt fünf Methoden, um den sogenannten Datensatzzeiger zu verschieben, sodass ein anderer Datensatz aktiv wird. Sie finden diese in Tabelle 35.1, wobei die Move-Methode vernachlässigt werden kann, denn je nach Sortierung und Filterung können Sie nicht ernsthaft wissen, wie viele Zeilen der gesuchte Datensatz entfernt ist.
Tabelle 35.1 Recordset-Methoden zum Verschieben des Datensatzzeigers
Methode |
|---|
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.