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Reference for unit 'db' (#fcl)

TDataSet.BookmarkValid

Test whether ABookMark is a valid bookmark.

Declaration

Source position: db.pas line 1620

public function TDataSet.BookmarkValid(

ABookmark: TBookMark

):Boolean; virtual;

Arguments

ABookmark

Bookmark pointer to test

Function result

True if ABookmark is a valid bookmark.

Description

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.

Errors

If the bookmark is a completely arbitrary pointer, an exception may be raised.