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mathes

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find and replace in strings

Hi experts,

I am searching a source code which replaces all occurencies of an "old" substring in a master-string
to a "new" substring. If the "old" substring can't be found in the master-string, the routine must be
quit without run-time error.

Have you suggestions for me how this could be accomplished?

With kind regards

Mathes
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ZifNab
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kretzschmar
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hi mathes,

other method

in a function

function replace_it(SourceS, OldS, NewS : String) : String;
var
  P : Integer;
  STmp, STmp2 : String;
begin
  STmp2 := '';
  STmp := SourceS;
  P := pos(OldS,STmp);
  while p <> 0 do
  begin
    STmp2 := STmp2 + copy(STmp,1,p-1)+NewS;
    delete(STmp,1,p+Length(OldS)-1);
    P := pos(OldS,STmp);
  end;
  STmp2 := STmp2 + STmp;
  result := STmp2;
end;

to call example:

procedure TForm1.Button1Click(Sender: TObject);
begin
  memo1.text := replace_it(memo1.text,edit1.text,edit2.text);
end;

meikl
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mathes

ASKER

Hi experts,

thank you for your excellent advice.