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第一步，先自己自定义一个Resources
1.新建一个xaml文件，在其中自定义好自己的Resources
这个Resource 的根节点是
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"></ResourceDictionary>
然后在根节点中写入自己要定义的样式，
注意，在对应特定控件的样式中，要写入 TargetType 对应于要设置样式的控件，如：
TargetType="{x:Type Button}"，并且对样式写上x:key= 以便查找：
入下面一个例子：
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<GradientStopCollection x:Key="MyGlassGradientStopsResource">
<GradientStop Color="WhiteSmoke" Offset="0.2" />
<GradientStop Color="Transparent" Offset="0.4" />
<GradientStop Color="WhiteSmoke" Offset="0.5" />
<GradientStop Color="Transparent" Offset="0.75" />
<GradientStop Color="WhiteSmoke" Offset="0.9" />
<GradientStop Color="Transparent" Offset="1" />
</GradientStopCollection>
<LinearGradientBrush x:Key="MyGlassBrushResource"
StartPoint="0,0" EndPoint="1,1" Opacity="0.75"
GradientStops="{StaticResource MyGlassGradientStopsResource}" />
<!-- Styles and other resources below here. -->
<LinearGradientBrush x:Key="GrayBlueGradientBrush"
StartPoint="0,0" EndPoint="1,1">
<GradientStop Color="YellowGreen" Offset="0" />
<GradientStop Color="#CCCCFF" Offset="0.5" />
<GradientStop Color="YellowGreen" Offset="1" />
</LinearGradientBrush>
<Style x:Key="GlassButton" TargetType="{x:Type Button}">
<Setter Property="Background"
Value="{StaticResource GrayBlueGradientBrush}" />
<Setter Property="Width" Value="80" />
<Setter Property="Margin" Value="10" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Grid Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}" ClipToBounds="True">
<!-- Outer Rectangle with rounded corners. -->
<Rectangle x:Name="outerRectangle" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Stroke="{TemplateBinding Background}"
RadiusX="20" RadiusY="20" StrokeThickness="5" Fill="Transparent" />
<!-- Inner Rectangle with rounded corners. -->
<Rectangle x:Name="innerRectangle" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Stroke="Transparent"
StrokeThickness="20"
Fill="{TemplateBinding Background}" RadiusX="20" RadiusY="20"
/>
<!-- Glass Rectangle -->
<Rectangle x:Name="glassCube" HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
StrokeThickness="2" RadiusX="10" RadiusY="10" Opacity="0"
Fill="{StaticResource MyGlassBrushResource}"
RenderTransformOrigin="0.5,0.5">
<Rectangle.Stroke>
<LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
<LinearGradientBrush.GradientStops>
<GradientStop Offset="0.0" Color="LightBlue" />
<GradientStop Offset="1.0" Color="Gray" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Rectangle.Stroke>
<!-- These transforms have no effect as they
are declared here.
The reason the transforms are included is to be targets
for animation (see later). -->
<Rectangle.RenderTransform>
<TransformGroup>
<ScaleTransform />
<RotateTransform />
</TransformGroup>
</Rectangle.RenderTransform>
<!-- A BevelBitmapEffect is applied to give the button a
"Beveled" look. -->
<Rectangle.BitmapEffect>
<BevelBitmapEffect />
</Rectangle.BitmapEffect>
</Rectangle>
<!-- Present Text of the button. -->
<DockPanel Name="myContentPresenterDockPanel">
<ContentPresenter x:Name="myContentPresenter" Margin="20"
Content="{TemplateBinding Content}" TextBlock.Foreground="Black" />
</DockPanel>
</Grid>
<ControlTemplate.Triggers>
<!-- Set properties when mouse pointer is over the button. -->
<Trigger Property="IsMouseOver" Value="True">
<!-- Below are three property settings that occur when the
condition is met (user mouses over button). -->
<!-- Change the color of the outer rectangle when user mouses over it. -->
<Setter Property ="Rectangle.Stroke" TargetName="outerRectangle"
Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
<!-- Sets the glass opacity to 1, therefore, the glass "appears" when user mouses over it. -->
<Setter Property="Rectangle.Opacity" Value="1" TargetName="glassCube" />
<!-- Makes the text slightly blurry as though you were looking at it through blurry glass. -->
<Setter Property="ContentPresenter.BitmapEffect" TargetName="myContentPresenter">
<Setter.Value>
<BlurBitmapEffect Radius="1" />
</Setter.Value>
</Setter>
</Trigger>
<!-- Set properties when button has focus. -->
<Trigger Property="IsFocused" Value="true">
<Setter Property="Rectangle.Opacity" Value="1" TargetName="glassCube" />
<Setter Property="Rectangle.Stroke" TargetName="outerRectangle"
Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" />
<Setter Property="Rectangle.Opacity" Value="1" TargetName="glassCube" />
</Trigger>
<!-- Animations that start when mouse enters and leaves button. -->
<EventTrigger RoutedEvent="Mouse.MouseEnter">
<EventTrigger.Actions>
<BeginStoryboard Name="mouseEnterBeginStoryboard">
<Storyboard>
<!-- This animation makes the glass rectangle shrink in the X direction. -->
<DoubleAnimation Storyboard.TargetName="glassCube"
Storyboard.TargetProperty=
"(Rectangle.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)"
By="-0.1" Duration="0:0:0.5" />
<!-- This animation makes the glass rectangle shrink in the Y direction. -->
<DoubleAnimation
Storyboard.TargetName="glassCube"
Storyboard.TargetProperty=
"(Rectangle.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)"
By="-0.1" Duration="0:0:0.5" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent="Mouse.MouseLeave">
<EventTrigger.Actions>
<!-- Stopping the storyboard sets all animated properties back to default. -->
<StopStoryboard BeginStoryboardName="mouseEnterBeginStoryboard" />
</EventTrigger.Actions>
</EventTrigger>
<!-- Animation fires when button is clicked, causing glass to spin. -->
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="glassCube"
Storyboard.TargetProperty=
"(Rectangle.RenderTransform).(TransformGroup.Children)[1].(RotateTransform.Angle)"
By="360" Duration="0:0:0.5" />
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
第二步：在项目的配置文件 App.xaml 中配置 自定义Resources
在 App.xml根节点下面建立一个 <Application.Resources>，其中定义ResourceDictionary节点
在其中配置自己定义的Resources，例如：
<Application x:Class="PaperOfficerPro.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" StartupUri="MainWindow.xaml">
<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resource/ButtonResource.xaml"></ResourceDictionary>
<ResourceDictionary Source="Resource/ExpanderStyleResource.xaml"></ResourceDictionary>
<ResourceDictionary Source="Resource/GlassButtonStyle.xaml"></ResourceDictionary>
<ResourceDictionary Source="Resource/DataGridResource.xaml"></ResourceDictionary>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>
</Application>
第三步，页面引用Resource中自定义的样式：
在页面的需要引用样式的控件的样式属性上引用样式
如需要在Button属性中引用第一步中定义的TargetType="{x:Type Button}" 的样式，那么就引用这个样式的x:key中的值。
例如：
<Button x:Name="LoginSubmit" Style="{DynamicResource GlassButton}" Width="Auto" Margin="117,271,148,20" Content="确定登陆" Click="LoginSubmit_Click" FontSize="14" Grid.RowSpan="2" >
</Button>
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原文地址：http://www.cnblogs.com/beautylan/p/4178431.html
