uses
..., TypInfo;
function TForm1.IsAPropExist(AInst: TObject; const PropName: string): Boolean;
var
PropInfo: PPropInfo;
begin
Result := False;
PropInfo := GetPropInfo(AInst, PropName);
if PropInfo <> nil then
Result := PropInfo.Name = PropName;
end;
procedure TForm1.Button2Click(Sender: TObject);
var
i: Integer;
begin
for i := 0 to Self.ComponentCount - 1 do
begin
if IsAPropExist(Self.Components[i], 'Caption') then
SetPropValue(Self.Components[i], 'Caption', IntToStr(i));
end;
end;
-------------------------------------------------------------------------------
uses
..., TypInfo;
procedure TForm1.FormCreate(Sender: TObject);
var
i: Integer;
aComponent: TComponent;
PropInfo: PPropInfo;
ViewText, ViewHint: string;
begin
ViewText := 'Hello world'; // for debug use, you should comment these 2 lines
ViewHint := 'the hint'; // and then implement GetInfoByName method.
for i := 0 to ComponentCount - 1 do
begin
aComponent := Components[i];
PropInfo := GetPropInfo(aComponent.ClassInfo, 'Caption');
if not Assigned(PropInfo) then // Caption property of aComponent NOT exists
begin
// turn to search Text property
PropInfo := GetPropInfo(aComponent.ClassInfo, 'Text');
if not Assigned(PropInfo) then // Text property of aComponent NOT exists
Continue;
end;
// comes here, either Caption or Text property must exists
// first, find the ViewText and ViewHint of the aComponent by the name
// GetInfoByName(aComponent.Name, ViewText, ViewHint);
SetStrProp(aComponent, PropInfo, ViewText);
// then, search Hint property
PropInfo := GetPropInfo(aComponent.ClassInfo, 'Hint');
if Assigned(PropInfo) then
SetStrProp(aComponent, PropInfo, ViewHint);
end;
end;
