属性触发器是通过 某个条件触发改变属性 通过无代码实现功能
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<Style TargetType=
"{x:Type Label}">
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<Style.Triggers>
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<Trigger Property=
"IsMouseOver" Value=
"True">
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<Setter Property=
"FontSize" Value=
"30"/>
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<Setter Property=
"Background" Value=
"DarkGreen"/>
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</Trigger>
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</Style.Triggers>
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</Style>
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</Window.Resources>
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<Grid>
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<Label x:Name=
"ss" Content=
"属性触发器" HorizontalAlignment=
"Center" VerticalAlignment=
"Center"></Label>
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</Grid>
触发器都在样式里 用 triggers定义