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

问题描述

我想在运行时通过InitRadioGroup（）过程设置RadioButton属性。
它失败，因为RadioGroup.ControlCount为0，尽管RadioGroup中有3个RadioButton。

D2010 RadioGroup有什么问题？
相同的代码在Delphi 2007中可以正常工作。

 过程InitRadioGroup（RadioGroup：TRadioGroup）; 
 var 
 i：整数； 
 RadioButton：TRadioButton； 
 for i：= 0到RadioGroup.ControlCount开始
-1做
 Begin 
 RadioButton：=（RadioGroup.Controls [i]作为TRadioButton）; 
 
 RadioButton.ParentColor：= False; 
 RadioButton.ParentFont：= False; 
 RadioButton.Font.Style：= []; 
结尾； 
  

解决方案

我假设在您的手术过程中RadioGroup不可见叫做。因此，可能不会再创建RadioButtons。

调用 RadioGroup.HandleNeeded 应该可以为您解决这个问题。 / p>

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.

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;

解决方案

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

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

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