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Modified

property Modified: Boolean read;

Example​

procedure ResolvePending(const Data: TvxClientDataSet);
begin
  if Data.Modified then
    Data.Post
  else
    Data.Cancel;
end;

Usage​

Modified reports whether the current edit or insert record buffer has been changed since entering/resetting that state.

  • Read only in the context of the current pending record.
  • Do not use it to decide whether an entire flow/database transaction has changes.
  • Validation can still fail even when Modified is true.

Additional Technical Info​

Modified is declared by hidden ancestor TDataSet and is normally used through a visible descendant such as TvxClientDataSet. It is not a dataset-wide change log or database dirty indicator.

Source-backed behaviour​

The property exposes FModified. Field edits/data events set it, while insert completion, Post, Cancel and temporary state transitions reset it. CheckBrowseMode uses it: modified edit/insert state is posted, while unmodified state is cancelled.

TvxClientDataSet normally sets LogChanges=False after opening outside data-edit mode, so Modified must not be confused with the client dataset's update log. It says nothing about prior posted rows or database application.

Edit, Post and Cancel define its lifecycle.

Official RTL references​

Created 2026-07-15