var i: Integer; begin for i := 1 to 30 do TEdit(FindComponent('Edit' + IntToStr(i))).Clear; end;
for i := 0 to ComponentCount - 1 do begin if Components[I] is TEdit then TEdit(Components[I]).Clear; end;
procedure TForm1.Button1Click(Sender: TObject); var i: Integer; begin for i := 0 to self.ComponentCount-1 do if self.Components[i].ClassType=TEdit then (self.Components[i] as Tedit).Clear; end;无论多少
procedure TForm1.Button1Click(Sender: TObject); var i: Integer; begin for i := 0 to self.ComponentCount-1 do if self.Components[i].ClassType=TEdit then (self.Components[i] as Tedit).Clear; end;无论多少
var i:integer; begin for i :=form1.ComponentCount-1 downto 0 do//downto可以防止出错! begin if Components[i] is Tbutton then (self.Components[i] as tbutton).Caption:='new' ; end;end;
遍历Controls,而非Componentsvar i: Integer; begin with Self do for i := 0 to ControlCount-1 do if Controls[i] is TEdit then (Controls[i] as TEdit).Clear; end;因为Components包括不可视的组件,这样会增加操作的元素!!!
begin
for i := 1 to 30 do
TEdit(FindComponent('Edit' + IntToStr(i))).Clear;
end;
begin
if Components[I] is TEdit then
TEdit(Components[I]).Clear;
end;
var i: Integer;
begin
for i := 0 to self.ComponentCount-1 do
if self.Components[i].ClassType=TEdit then
(self.Components[i] as Tedit).Clear;
end;无论多少
var i: Integer;
begin
for i := 0 to self.ComponentCount-1 do
if self.Components[i].ClassType=TEdit then
(self.Components[i] as Tedit).Clear;
end;无论多少
begin
for i :=form1.ComponentCount-1 downto 0 do//downto可以防止出错!
begin
if Components[i] is Tbutton then
(self.Components[i] as tbutton).Caption:='new' ; end;end;
i: Integer;
begin
with Self do
for i := 0 to ControlCount-1 do
if Controls[i] is TEdit then
(Controls[i] as TEdit).Clear;
end;因为Components包括不可视的组件,这样会增加操作的元素!!!