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    TDataSet.CompareBookmarks

    Compare two bookmarks.

    Declaration

    Source position: db.pas line 1906

    public 
function TDataSet.CompareBookmarks(Bookmark1: TBookMark; 
                                  Bookmark2: TBookMark) : LongInt
                                  ;  virtual;

    Description

    CompareBookmarks can be used to compare the relative positions of 2 bookmarks. It returns a negative value if Bookmark1 is located before Bookmark2, zero if they refer to the same record, and a positive value if the second bookmark appears before the first bookmark. This function must be overridden by descendent classes of TDataset. The implementation in TDataset always returns zero.

    Errors

    No checks are performed on the validity of the bookmarks.

    See also

    Name Description
    TDataset.BookmarkValid Test whether ABookMark is a valid bookmark.
    TDataset.GetBookmark Get a bookmark pointer (deprecated).
    TDataset.SetBookmark