为什么会出现这个错误Operator not applicable to this operand type？

[woaiwd]

procedure TForm1.Button1Click(Sender:TObject);
begin
  if edit1.text<>'' and edit2.text<>'' then
    begin
      ShowMessage('正确');
    end
  else
    ShowMessage('不能为空');
end;

编译时为啥会出现Operator not applicable to this operand type错误呢？感觉哪也没写错呀？

[aluyue]

if (edit1.text<>'') and (edit2.text<>'') then

[woaiwd]

晕，这么个小错误啊

[mizhihui93]

哈哈 我也出现这个错误

[hewen7100]

差两个括号