Skip to content

    TDataSet.BookmarkValid

    Test whether ABookMark is a valid bookmark.

    Declaration

    Source position: db.pas line 1900

    public 
function TDataSet.BookmarkValid(ABookmark: TBookMark) : Boolean
                               ;  virtual;

    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.

    See also

    Name Description
    TDataset.GetBookmark Get a bookmark pointer (deprecated).
    TDataset.SetBookmark
    TDataset.FreeBookmark Free a bookmark obtained with GetBookmark (deprecated).
    TDataset.BookmarkAvailable