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Test whether ABookMark is a valid bookmark.
Source position: db.pas line 1620
public function TDataSet.BookmarkValid( |
ABookmark: TBookMark |
):Boolean; virtual; |
ABookmark |
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Bookmark pointer to test |
True if ABookmark is a valid bookmark.
BookmarkValid returns True if ABookMark is a valid bookmark for the dataset. Various operations can render a bookmark invalid: changing the sort order, closing and re-opening the dataset. BookmarkValid always returns False in TDataset. Descendent classes must override this method to do an actual test.
If the bookmark is a completely arbitrary pointer, an exception may be raised.
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Get a bookmark pointer (deprecated) |
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TDataset.SetBookmark |
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Free a bookmark obtained with GetBookmark (deprecated) |
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TDataset.BookmarkAvailable |