Unit 'DB'	Package
[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index]	[#fcl]

TDataSet.BookmarkValid

Test whether ABookMark is a valid bookmark.

Declaration

Source position: db.pas line 1896

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.