将控件交换到其他父对象中 [英] Swapping control into a different parent

问题描述

同事，

我试图实现的是一种取消停靠的行为，其中控件可以从一种形式取消停靠并以另一种形式浮动.我的代码基于有效的参考设计*- DockExtender [

Colleagues,

What I''m trying to achieve is kind of an undocking behavior, where a control can undock from one form and float in a different form. My code is based on a working reference design* - DockExtender[^] **. Unfortunately, I ran into a problem. I’m getting an exception when I try to assign a different parent form to the control.

private void FloatPanel()
{
   // this method resides in the new parent form for the control to float in
   // m_ctrlContainer control, which will be swapped into a floating form
   m_ctrlContainer.Parent = this;   // throws exception "Collection is read only."
}

如果我调用this.Controlls.Add(m_ctrlContainer)，则会发生相同的异常.看起来父级处于无法添加控件的状态.我该怎么做才能向其中添加控件?

任何建议，见解或参考都非常感谢！

-尼克

*我正在重新创建DockExtender(参考设计).这是一种练习，而不是尝试按原样重用对接框架.

** DockExtender文章讨论中的并行线程 [ ^ ].

The same exception occurs if I call this.Controlls.Add(m_ctrlContainer). It looks like the parent is in a state where controls can’t be added. What can I do to add controls to it?

Any suggestion, insight or reference is really appreciated!

- Nick

* I''m re-creating the DockExtender (reference design). It''s an exercise rather than attempt to reuse a docking framework as-is.

** Parallel thread in the DockExtender article discussion[^].

推荐答案

我的m_ctrlContainer是SplitContainer的内置"面板(与splitContainer1.Panel1相同).这就是为什么该集合是只读的.嗯，

这段代码为我指明了正确的方向.

My m_ctrlContainer was a "built-in" panel of a SplitContainer (as in splitContainer1.Panel1). That''s why the collection was read-only. Well duh.

This code had pointed me in the right direction.

m_ctrlContainer.Parent.Controls.Remove(m_ctrlContainer);  // threw exception "Collection is read only."
this.Controls.Add(m_ctrlContainer);  // although intuitively, I was expecting the exception here 

随后，我用单独的拆分器和面板替换了SplitContainer.显然，层次结构现在看起来像这样:

Subsequently, I''ve replaced the SplitContainer with separate splitter and panels. The hierarchy, obviously, now looks like this:

Form1
  - panel1
  - splitter1
  - panel2

这使得显式取消父项和重新父项化工作成为可能.隐式取消育儿也可以.

That made explicit un-parenting and re-parenting work. Implicit un-parenting works as well.

m_ctrlContainer.Parent = this;  // Probably, the framework is calling .Parent.Controls.Remove() and this.Controls.Add() internally.

感谢大家的支持和建议！

-尼克

Thanks to all for your support and advice!

- Nick

不知道是否有帮助，但是您是否看过 SDock [ ^ ]在CodePlex上.您可能会不喜欢它的日语，因此您必须修复本地化.虽然看起来很好看:)

我个人使用 DevExpress XtraBars [

Don''t know if it will help, but have you looked at SDock[^] on CodePlex. You''ll probably not like that it''s Japanese, so you''ll have to fix localization. Looks very nice though :)

Personally I use DevExpress XtraBars[^] for this kind of functionality.

Update
Try adding a level of indirection - don''t use the form, but a panel on that form as the new parent.

Regards
Espen Harlinn

也许您需要先从其旧父控件中删除该控件?像这样的东西:

Perhaps you need to remove the control from its old parent first? Something like:

m_ctrlContainer.Parent.Controls.Remove(m_ctrlContainer);
this.Controls.Add(m_ctrlContainer);

这篇关于将控件交换到其他父对象中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！