edit只能输入数字,小数点,和回退键
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', '.', #8 ]) then
begin
Key := #0;
end;
end;
procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
begin
if not (Key in ['0'..'9', '.', #8 ]) then
begin
Key := #0;
end;
end;