Delphi 2010 中 RadioGroup.ControlCount 的问题 [英] Problem with RadioGroup.ControlCount in Delphi 2010

问题描述

我想在过程 InitRadioGroup() 的运行时设置 RadioButton 属性.它失败是因为 RadioGroup.ControlCount 为 0，尽管 RadioGroup 中有 3 个 RadioButton.

I'd like to set RadioButton properties in runtime in procedure InitRadioGroup(). It fails because RadioGroup.ControlCount is 0, although there are 3 RadioButtons in RadioGroup.

D2010 RadioGroup 出了什么问题?相同的代码在 Delphi 2007 中运行良好.

What is wrong in D2010 RadioGroup? Same code works fine in Delphi 2007.

procedure InitRadioGroup(RadioGroup: TRadioGroup);
var
  i: integer;
  RadioButton: TRadioButton;
begin
  for i := 0 to RadioGroup.ControlCount - 1 do
  begin
    RadioButton := (RadioGroup.Controls[i] as TRadioButton);

    RadioButton.ParentColor := False;
    RadioButton.ParentFont  := False;
    RadioButton.Font.Style  := [];
end;

推荐答案

我假设 RadioGroup 在调用您的过程时不可见.所以那时可能不会创建 RadioButtons.

I assume that the RadioGroup is not visible when your procedure is called. So the RadioButtons may not be created then.

调用 RadioGroup.HandleNeeded 应该会为您解决此问题.

A call to RadioGroup.HandleNeeded should fix this for you.

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