UIElement.InvalidateMeasure Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Invalidates the measurement state (layout) for the element.
public:
void InvalidateMeasure();
public void InvalidateMeasure ();
member this.InvalidateMeasure : unit -> unit
Public Sub InvalidateMeasure ()
Remarks
Calling this method also calls InvalidateArrange internally, there is no need to call InvalidateMeasure and InvalidateArrange in succession. After the invalidation, the element will have its layout updated, which will occur asynchronously, unless UpdateLayout is called to force a synchronous layout change.
The WPF framework-level layout system does its own handling of changes in the visual tree of an element, and in most common layout invalidation cases the layout system is calling the equivalent of this method when necessary. You should only call this method if you are producing a complete layout implementation, which does direct manipulation of the element tree, or similar advanced scenarios. One such advanced scenario is if you are creating a PropertyChangedCallback for a dependency property that is not on a Freezable or FrameworkElement derived class that still influences the measure pass of layout when it changes.
Frequent calls to InvalidateMeasure or in particular to UpdateLayout have significant performance consequences. Therefore, avoid calling this method unless you absolutely require precise layout state for subsequent calls to other APIs in your code.
Applies to
.NET
피드백
https://aka.ms/ContentUserFeedback
출시 예정: 2024년 내내 콘텐츠에 대한 피드백 메커니즘으로 GitHub 문제를 단계적으로 폐지하고 이를 새로운 피드백 시스템으로 바꿀 예정입니다. 자세한 내용은 다음을 참조하세요.다음에 대한 사용자 의견 제출 및 보기