如何在Windows窗体窗体中循环浏览所有控件，或者如何查找特定控件是否为容器控件? [英] How to loop through all controls in a Windows Forms form or how to find if a particular control is a container control?

问题描述

我会说出我的要求.我需要在 Windows窗体中的每个控件都有一个 keydown 事件.形式.如果我对所有按键事件必须执行的操作都相同，那么最好对所有控件执行此操作，而不要手动进行.

I will tell my requirement. I need to have a keydown event for each control in the Windows Forms form. It's better to do so rather than manually doing it for all controls if what I have to do for all keydown events is the same.

所以我基本上可以做到这一点:

So I could basically do this:

foreach (Control c in this.Controls)
    c.KeyDown+= new KeyEventHandler(c_KeyDown);

但是在这里，foreach不会在位于groupBox或tabControl内的那些控件内循环.我的意思是，如果表单(this)包含一个groupBox或其他容器控件，那么我可以获得该特定容器控件的keydown事件.而且 foreach 不会遍历位于该容器控件内的控件.

But here, the foreach doesn't loop inside those controls which reside inside a groupBox or a tabControl. I mean if the form (this) contains a groupBox or some other container control, then I can get a keydown event for that particular container control. And the foreach doesn't loop through controls that reside inside that container control.

问题1:如何获得针对全部"广告素材的keydown事件?控件的形式?

Question 1: How do I get a keydown event for "all" the controls in a form?

如果以上难题解决了，那么我的问题就解决了.

If the above puzzle is solved, then my problem is over.

这是我可以做的:

foreach (Control c in this.Controls)
{
     c.KeyDown += new KeyEventHandler(c_KeyDown);

     if (c is Container control)
           FunctionWhichGeneratesKeyDownForAllItsChildControls(c)
}

我知道我必须经历多次 FunctionWhichGeneratesKeyDownForAllItsChildControls(c)多次，以获取所有控件的键控(如果一个或多个左右的boxbox都在其中).我能做到.我的问题是，

I know I will have to go through FunctionWhichGeneratesKeyDownForAllItsChildControls(c) many times over to get keydown for all controls if there are groupboxes inside a groupbox or so. I can do it. My question is,

问题2:如何检查 c 是否是容器控件?

Question 2: How do I check if c is a container control?

推荐答案

一个简单的递归函数应该可以做到.

A simple recursive function should do it.

private void AddEvent(Control parentCtrl)
{
  foreach (Control c in parentCtrl.Controls)
  {
    c.KeyDown += new KeyEventHandler(c_KeyDown);
    AddEvent(c);
  }
}

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