C#: Does ResumeLayout(true) do the same as ResumeLayout(false) + PerformLayout()?
Solution 1
Using reflector:
this.ResumeLayout() is equal to this.ResumeLayout(true)
But
this.ResumeLayout(true) is not equal to this.ResumeLayout(false) + this.PerformLayout()
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.
Solution 2
SuspendLayout
When adding several controls to a parent control, it is recommended that you call the SuspendLayout method before initializing the controls to be added. After adding the controls to the parent control, call the ResumeLayout method. This will increase the performance of applications with many controls.
PerformLayout
It forces the control to apply layout logic to all its child controls. If the SuspendLayout method was called before calling the PerformLayout method, the Layout event is suppressed. The layout event can be suppressed using the SuspendLayout and ResumeLayout methods.
MSDN Link - PerformLayout Method
Lemon
Software Developer, Geek, HSP, SDA, ..., open, honest, careful, perfectionist, ... Currently into indoor rowing and rock climbing, just to mention something non-computer-related... Not the best at bragging about myself... so... not sure what more to write... 🤔
Updated on June 17, 2022Comments
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Lemon about 2 years
I have looked at the generated designer code of
Form
s andUserControl
s, and in theInitializeComponent()
method they always start withthis.SuspendLayout();
and end with
this.ResumeLayout(false); this.PerformLayout();
But from what I can see in the msdn documentation of those methods, wouldn't ending with
this.ResumeLayout(true); // Or just this.ResumeLayout()
do the exact same thing? Or am I missing something here?
Asking because I will be adding a bunch of controls in a different method, and thought I should do the suspend-resume routine to be nice and efficient. But can't figure out what the reason for those two method calls are when you can seemingly just use one...