C# WPF 资源字典

1、在Window.Resources中声明

注意：这种方式声明的资源只能在当前Window中使用。

1）在Xaml中使用：

<Window x:Class="WpfApp_Test.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:WpfApp_Test"
        mc:Ignorable="d"
        Title="MainWindow" Height="240" Width="300">
    <Window.Resources>
        <ResourceDictionary>
            <Style TargetType="TextBlock" >
                <Setter Property="FontStyle" Value="Italic"/>
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="Red"/>
            </Style>
            <Style x:Key="textBlockStyle" TargetType="TextBlock" >
                <Setter Property="Foreground" Value="Green"/>
            </Style>
        </ResourceDictionary>
    </Window.Resources>
    <StackPanel>
        <TextBlock  Text="Hello"/>
        <TextBlock  Text="Hello" Style="{StaticResource textBlockStyle}"/>
        <TextBlock  Text="Hello" Style="{x:Null}"/>
    </StackPanel>
</Window>

运行效果：

2）在后台代码中使用：

<Window x:Class="WpfApp_Test.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:WpfApp_Test"
        mc:Ignorable="d"
        Title="MainWindow" Height="240" Width="300">
    <Window.Resources>
        <ResourceDictionary>
            <Style TargetType="TextBlock" x:Key="TextBlockStyle">
                <Setter Property="FontStyle" Value="Italic"/>
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="Red"/>
            </Style>
        </ResourceDictionary>
    </Window.Resources>
    <StackPanel>
        <TextBlock x:Name="textBlock1" Text="Hello"/>
        <TextBlock x:Name="textBlock2" Text="Hello"/>
        <TextBlock x:Name="textBlock3" Text="Hello"/>
    </StackPanel>
</Window>


public partial class MainWindow 
{         
    public MainWindow()
    {
        InitializeComponent();
        Style style = (Style)this.FindResource("TextBlockStyle");　　//搜索
　　　　 //如果明确知道资源放在哪里，则可以使用
　　　　 //Style style = (Style)this.Resources["TextBlockStyle"];
        textBlock1.Style = style;
    }       
}

运行效果：

2、在App.xaml中声明（全局可用）

<Application
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApp_Test"
             xmlns:av="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="av" x:Class="WpfApp_Test.App"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <Style TargetType="TextBlock" >
                <Setter Property="FontStyle" Value="Italic"/>
                <Setter Property="FontWeight" Value="Bold"/>
                <Setter Property="Foreground" Value="Red"/>
            </Style>
            <Style x:Key="textBlockStyle" TargetType="TextBlock" >
                <Setter Property="Foreground" Value="Green"/>
            </Style>
        </ResourceDictionary>
 
    </Application.Resources>
</Application>


<Window x:Class="WpfApp_Test.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:WpfApp_Test"
        mc:Ignorable="d"
        Title="MainWindow" Height="240" Width="300">    
    <StackPanel>
        <TextBlock  Text="Hello"/>
        <TextBlock  Text="Hello" Style="{StaticResource textBlockStyle}"/>
        <TextBlock  Text="Hello" />
    </StackPanel>
</Window>

运行效果：

3、在资源字典文件中声明：

添加资源字典文件的方式，先在项目中新建一个文件夹Resources（也可以不用建文件夹），然后点击右键-——Add——Resource Dictionary(WPF)。然后把资源添加进去。

//TextBlockStyle.xaml：资源字典文件
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="TextBlock" >
        <Setter Property="FontStyle" Value="Italic"/>
        <Setter Property="FontWeight" Value="Bold"/>
        <Setter Property="Foreground" Value="Red"/>
    </Style>
    <Style x:Key="textBlockStyle" TargetType="TextBlock" >
        <Setter Property="Foreground" Value="Green"/>
    </Style>
</ResourceDictionary>


//App.xaml
<Application
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:WpfApp_Test"
             xmlns:av="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="av" x:Class="WpfApp_Test.App"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Resources/TextBlockStyle.xaml"/>  
　　　　　　 //或者<ResourceDictionary Source="/WpfApp_Test;component/Resources/TextBlockStyle.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
 
    </Application.Resources>
</Application>


//MainWindow.xaml
<Window x:Class="WpfApp_Test.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:WpfApp_Test"
        mc:Ignorable="d"
        Title="MainWindow" Height="240" Width="300">    
    <StackPanel>
        <TextBlock  Text="Hello"/>
        <TextBlock  Text="Hello" Style="{StaticResource textBlockStyle}"/>
        <TextBlock  Text="Hello" />
    </StackPanel>
</Window>

最简单的就是直接写文件路径

<ResourceDictionary Source="Resources/TextBlockStyle.xaml"/>

注：Style 可以通过BaseOn继承其他Style

//资源字典文件
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style TargetType="TextBlock" >
        <Setter Property="FontStyle" Value="Italic"/>
        <Setter Property="FontWeight" Value="Bold"/>        
    </Style>
    <Style x:Key="textBlockStyleGreen" TargetType="TextBlock" BasedOn="{StaticResource {x:Type TextBlock}}">
        <Setter Property="Foreground" Value="Green"/>
    </Style>
    <Style x:Key="textBlockStyleRed" TargetType="TextBlock" >
        <Setter Property="Foreground" Value="Red"/>
    </Style>
</ResourceDictionary>


<Window x:Class="WpfApp_Test.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:WpfApp_Test"
        mc:Ignorable="d"
        Title="MainWindow" Height="240" Width="300">    
    <StackPanel>
        <TextBlock  Text="Hello"/>
        <TextBlock  Text="Hello" Style="{StaticResource textBlockStyleGreen}"/>
        <TextBlock  Text="Hello" Style="{StaticResource textBlockStyleRed}"/>
    </StackPanel>
</Window>