C#:ResumeLayout(true)是否与ResumeLayout(false)+ PerformLayout()一样?

问题描述

我已经查看了生成的Form s和UserControl s设计器代码，在InitializeComponent()方法中，它们始终以

I have looked at the generated designer code of Forms and UserControls, and in the InitializeComponent() method they always start with

    this.SuspendLayout();

并以

    this.ResumeLayout(false);
    this.PerformLayout();

但是从我在这些方法的msdn文档中所看到的，并不会以

But from what I can see in the msdn documentation of those methods, wouldn't ending with

    this.ResumeLayout(true); // Or just this.ResumeLayout()

完全一样吗?还是我在这里想念东西?

do the exact same thing? Or am I missing something here?

询问，因为我将以另一种方法添加一堆控件，并认为我应该执行suspend-resume例程以使其美观高效.但是无法弄清楚这两个方法调用的原因是什么，当您似乎只能使用一个方法时...

推荐答案

使用反射器:

this.ResumeLayout() is equal to this.ResumeLayout(true)

但是

this.ResumeLayout(true) is not equal to this.ResumeLayout(false) + this.PerformLayout()

原因:
当使用false调用ResumeLayout时，将循环遍历一个控件集合，并且LayoutEngine在布局中的每个控件上调用InitLayout.

Reason:
When ResumeLayout is called with false, there is a control collection that is looped through and the LayoutEngine calls InitLayout on each of the controls in the layout.

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