WPF中的Width和ActualWidth有什么区别? [英] What is the difference between Width and ActualWidth in WPF?

问题描述

我目前正在WPF中使用Panel，并且我注意到关于Width和Height属性，还有两个其他属性，分别称为ActualWidth和ActualHeight.

I am currently working with Panels in WPF, and I noticed that as regards the Width and Height properties, there are also two other properties called ActualWidth and ActualHeight.

ActualWidth

获取此对象的渲染宽度 元素.这是一个依赖 财产. (继承自 FrameworkElement.)

Gets the rendered width of this element. This is a dependency property. (Inherited from FrameworkElement.)

Width

获取或设置元素的宽度. 这是一个依赖属性. (继承自FrameworkElement.)

Gets or sets the width of the element. This is a dependency property. (Inherited from FrameworkElement.)

参考: MSDN

谁能指出两者之间的区别以及何时使用其中任何一个?

推荐答案

Width/Height是请求的大小或布局.如果设置为自动"，则在后面的代码中访问属性时，该值为double.NaN.

Width/Height is the requested or layout size. If you set to Auto, then the value is double.NaN when you access the property in code behind.

ActualWidth/ActualHeight和RenderSize.Width/RenderSize.Height都返回元素的渲染大小，因为 RenderSize 的类型为 Size .如果您想要/需要商品的实际尺寸，请使用以下任何属性.

ActualWidth/ActualHeight and RenderSize.Width/RenderSize.Height both return the element's rendered size, as RenderSize is of type Size. If you want/need the actual size of the item, then use any of these attributes.

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