样式类似于Html中的CSS,如果你的界面有许多元素(例如按钮)的外观有相同的属性,那么可以把这些属性集中到一个称为资源的元素中,之后每个元素可以通过引用相应的资源来达到外观一致性的目的。
下面的Xaml演示了上述的效果:
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在代码中,我们在DockPanel的资源定义了Header的StackPanel背景以及Button的背景和其他属性。因为有多个StackPanel,我们只要求Header有渐变的背景,所以必须给Style一个Key,这样Header面板就可以通过Style="{StaticResource Header}"引用资源的设置。
在按钮的样式定义中,我们并没有设置key,这样可以对所有按钮有效。