TRichView Reference | TDBRichViewEdit

Example: Using viewer-style methods in DBRichViewEdit

This example shows how to use viewer-style methods in DBRichViewEdit (i.e. methods, introduced in TCustomRichView).

DBRichViewEdit1 edits a field of table Table1.We want to load RTF file.

procedure TForm1.Button1Click(Sender: TObject);

begin

  if OpenDialog1.Execute and DBRichViewEdit1.CanChange then begin

    DBRichViewEdit1.Clear;

    DBRichViewEdit1.LoadRTF(OpenDialog1.FileName);

    DBRichViewEdit1.Change;

    DBRichViewEdit1.Format;

  end;

end;

Calling CanChange has the same effect as calling Table1.Edit.

If you want to save changes in the database immediately, call Table1.Post instead of DBRichViewEdit1.Format.

This sequence of actions (CanChange - modifications - Change - Format) is required only for viewer-style methods.

Editing-style methods do this work automatically:

procedure TForm1.Button2Click(Sender: TObject);

begin

  if OpenDialog1.Execute then

    DBRichViewEdit1.InsertRTFFromFileEd(OpenDialog1.FileName);

end;