全局样式和资源字典

1. 在解决方案中添加资源字典buttonStytle，最好自定义个文件夹放里边。如图：
   
2. 资源字典中写样式,注意基样式可以有key可以无key。

   <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
   
       <!--基类样式无key-->
        <Style TargetType="Button">
           <Setter Property="Background" Value="Yellow"/>
       </Style>
       <!--注意BaseOn写法-->
       <Style TargetType="Button" x:Key="startButton" BasedOn="{StaticResource {x:Type Button}}">
           <Setter Property="Width" Value="200"/>
       </Style>
   
       <!--基类样式有key-->
       <Style TargetType="Button" x:Key="quitButtonBase">
           <Setter Property="Background" Value="Blue" />
       </Style>
       <!--注意BaseOn写法-->
       <Style TargetType="Button" x:Key="quitButton" BasedOn="{StaticResource quitButtonBase}">
           <Setter Property="Width" Value="200"/>
       </Style>
   
   </ResourceDictionary>
   

3. App.xaml中引用资源字典, <ResourceDictionary Source="/WPFUI;component/资源字典路径" />

    <Application
    x:Class="WPFUI.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WPFUI"
    StartupUri="MainWindow.xaml">
   
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="/WPFUI;component/style/buttonStyle.xaml" />
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
   
    </Application.Resources>
    </Application>
   

4. 控件引用样式

   <Window x:Class="WPFUI.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WPFUI"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <StackPanel>
            <Button Content="开始" Style="{StaticResource startButton}"/>
            <Button Content="结束" Style="{StaticResource quitButton}"/>
        </StackPanel>
    </Grid>
    </Window>
   

5. 结束。