WPF換膚的設計原理，利用資源字典為每種皮膚資源添加不同的樣式，在后臺切換皮膚資源文件。
截圖
上圖中，第一張圖采用規則樣式，第二張圖采用不規則樣式，截圖的時候略有瑕疵。
資源字典
規則樣式資源Skin.RegularStyle.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <!--Window樣式--> <Style x:Key="WindowStyle" TargetType="Window"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Window"> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="Green" Offset="0"></GradientStop> <GradientStop Color="LightGreen" Offset="0.4"></GradientStop> <GradientStop Color="White" Offset="1"></GradientStop> </LinearGradientBrush> </Border.Background> <ContentPresenter></ContentPresenter> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--Button樣式--> <Style TargetType="Button"> <Setter Property="Width" Value="70"></Setter> <Setter Property="Height" Value="23"></Setter> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Button"> <Border Name="bdr" Cursor="Arrow" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="White" Offset="0"></GradientStop> <GradientStop Color="LightGreen" Offset="0.3"></GradientStop> <GradientStop Color="Green" Offset="1"></GradientStop> </LinearGradientBrush> </Border.Background> <TextBlock Name="tbk" Background="Transparent" Foreground="DarkGreen" TextAlignment="Center" Text="{TemplateBinding Content}"></TextBlock> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="bdr" Property="Background"> <Setter.Value> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="LightGreen" Offset="0"></GradientStop> <GradientStop Color="Green" Offset="1"></GradientStop> </LinearGradientBrush> </Setter.Value> </Setter> <Setter TargetName="tbk" Property="Foreground" Value="White"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--TextBox樣式--> <Style TargetType="TextBox"> <Setter Property="FontFamily" Value="SketchFlow Print"/> <Setter Property="FontSize" Value="14"/> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="TextBox"> <Border BorderBrush="DarkGreen" BorderThickness="0.5"> <ScrollViewer x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"></ScrollViewer> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--ContextMenu樣式--> <Style TargetType="ContextMenu"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ContextMenu"> <Border BorderBrush="Green" BorderThickness="1"> <ItemsPresenter/> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--MenuItem樣式--> <Style TargetType="MenuItem"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="MenuItem"> <Border Name="border" Background="LightGreen" BorderThickness="0"> <TextBlock Name="tbk" Background="Transparent" Padding="5,5" Text="{TemplateBinding Header}"></TextBlock> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="border" Property="Background" Value="Green"></Setter> <Setter TargetName="tbk" Property="Foreground" Value="White"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--TextBlock樣式--> <Style TargetType="TextBlock"> <Setter Property="FontFamily" Value="SketchFlow Print"/> <Setter Property="FontSize" Value="14"/> </Style></ResourceDictionary>不規則樣式資源Skin.RoundedCornerStyle.xaml<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <!--Window樣式--> <Style x:Key="WindowStyle" TargetType="Window"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Window"> <Grid Margin="10"> <Rectangle Fill="{DynamicResource {x:Static SystemColors.WindowBrushKey}}" RadiusX="5" RadiusY="5"> <Rectangle.Effect> <DropShadowEffect BlurRadius="10" Color="Black" Direction="0" Opacity="0.8" RenderingBias="Performance" ShadowDepth="0"/> </Rectangle.Effect> </Rectangle> <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" SnapsToDevicePixels="True" CornerRadius="5"> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="Blue" Offset="0"></GradientStop> <GradientStop Color="LightBlue" Offset="0.4"></GradientStop> <GradientStop Color="White" Offset="1"></GradientStop> </LinearGradientBrush> </Border.Background> <ContentPresenter></ContentPresenter> </Border> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--Button樣式--> <Style TargetType="Button"> <Setter Property="Width" Value="70"></Setter> <Setter Property="Height" Value="23"></Setter> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Button"> <Border Name="bdr" CornerRadius="5" Cursor="Hand" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <TextBlock Name="tbk" Background="Transparent" Foreground="Yellow" TextAlignment="Center" Text="{Binding RelativeSource={RelativeSource TemplatedParent},Path=Content}"></TextBlock> <Border.Background> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="White" Offset="0"></GradientStop> <GradientStop Color="LightBlue" Offset="0.3"></GradientStop> <GradientStop Color="Blue" Offset="1"></GradientStop> </LinearGradientBrush> </Border.Background> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="bdr" Property="Background"> <Setter.Value> <LinearGradientBrush StartPoint="0,0" EndPoint="0,1"> <GradientStop Color="LightBlue" Offset="0"></GradientStop> <GradientStop Color="Blue" Offset="1"></GradientStop> </LinearGradientBrush> </Setter.Value> </Setter> <Setter TargetName="tbk" Property="Foreground" Value="LightYellow"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--TextBox樣式--> <Style TargetType="TextBox"> <Setter Property="FontFamily" Value="Times New Roman"></Setter> <Setter Property="FontSize" Value="14"></Setter> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="TextBox"> <Border BorderBrush="Blue" BorderThickness="0.5" CornerRadius="5"> <ScrollViewer x:Name="PART_ContentHost" Focusable="false" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden"></ScrollViewer> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--ContextMenu樣式--> <Style TargetType="ContextMenu"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ContextMenu"> <Border CornerRadius="5" BorderBrush="Blue" BorderThickness="1"> <ItemsPresenter/> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--MenuItem樣式--> <Style TargetType="MenuItem"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="MenuItem"> <Border Name="border" Background="LightSkyBlue" BorderThickness="0" CornerRadius="5"> <TextBlock Name="tbk" Background="Transparent" Padding="5,5" Text="{TemplateBinding Header}"></TextBlock> </Border> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="border" Property="Background" Value="BlueViolet"></Setter> <Setter TargetName="tbk" Property="Foreground" Value="White"></Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> <!--TextBlock樣式--> <Style TargetType="TextBlock"> <Setter Property="FontFamily" Value="Times New Roman"/> <Setter Property="FontSize" Value="14"/> </Style></ResourceDictionary>仔細觀察上面定義的樣式，你會發現在定義Window樣式的時候指定了Key，其他的Control樣式卻沒有指定Key。大家都知道，如果沒有給Style指定Key，那么這個Style會應用到所有目標類型(TargetType)為指定類型的Control。請看下面一段文字：
因為在換膚的過程中，需要動態加載Window的樣式，所以用DynamicResource作綁定Style="{DynamicResource WindowStyle}"。
App.xaml
程序運行的時候，默認加載規則樣式的皮膚。
<Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="Dictionary/Skin.RegularStyle.xaml"></ResourceDictionary> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources>
后臺代碼
/// <summary> /// MenuItem的執行方法 /// </summary> /// <param name="parameter"></param> private void RelayMenuItemEvent(object parameter) { if (parameter.ToString() == RegularStyle) { ChangeSkinResource(Skins[0]); } else if (parameter.ToString() == RoundedCornerStyle) { ChangeSkinResource(Skins[1]); } } /// <summary> /// 更換皮膚資源 /// </summary> /// <param name="skin"></param> private void ChangeSkinResource(ResourceDictionary skin) { if (Application.Current.Resources.MergedDictionaries[0].Source.IsAbsoluteUri) { if (Application.Current.Resources.MergedDictionaries[0].Source.OriginalString != skin.Source.OriginalString) { Application.Current.Resources.MergedDictionaries[0] = skin; } } else { if (Application.Current.Resources.MergedDictionaries[0].Source.OriginalString.ToString('//') != skin.Source.OriginalString.ToString('/')) { Application.Current.Resources.MergedDictionaries[0] = skin; } } }運行的時候在MainWindow上右鍵選擇皮膚樣式，就可以換膚了。
源碼下載：http://xiazai.VeVB.COm/201610/yuanma/WPFSkin(VeVB.COm).rar
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