CustomResource
- ResourceDictionary
- 加载外部的 ResourceDictionary 文件
示例
1、演示“CustomResource”相关知识点
Resource/CustomResourceTest.cs
/* * 本例是一个自定义 CustomXamlResourceLoader,用于演示 CustomResource 的使用 */ using Windows.UI.Xaml.Resources; namespace Windows10.Resource { // 如果要在 xaml 中使用 CustomResource,那么需要在 C# 端自定义一个 CustomXamlResourceLoader public class CustomResourceTest : CustomXamlResourceLoader { /// <summary> /// 返回 xaml 中的 CustomResource 请求的资源 /// </summary> /// <param name="resourceId">xaml 端的 CustomResource 中的 ResourceKey</param> /// <param name="objectType">使用了 CustomResource 的对象类型</param> /// <param name="propertyName">使用了 CustomResource 的属性名称</param> /// <param name="propertyType">使用了 CustomResource 的属性类型</param> /// <returns>返回指定的资源</returns> protected override object GetResource(string resourceId, string objectType, string propertyName, string propertyType) { return $"resourceId: {resourceId}, objectType: {objectType}, propertyName: {propertyName}, propertyType: {propertyType}"; } } }
Resource/CustomResourceDemo.xaml
<Page x:Class="Windows10.Resource.CustomResourceDemo" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows10.Resource" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Grid Background="Transparent"> <StackPanel Margin="10 0 10 10"> <!-- 下面演示如何使用 CustomResource,相关的自定义资源类参见 CustomResourceTest.cs --> <TextBlock Margin="5" Text="{CustomResource}" /> <TextBlock Margin="5" Text="{CustomResource Key1}" /> <TextBlock Margin="5" Text="{CustomResource Key2}" /> </StackPanel> </Grid> </Page>
Resource/CustomResourceDemo.xaml.cs
/* * 演示“CustomResource”相关知识点 */ using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Resources; namespace Windows10.Resource { public sealed partial class CustomResourceDemo : Page { public CustomResourceDemo() { // 这是必须的,需要先要指定当前使用的自定义 CustomXamlResourceLoader 实例 CustomXamlResourceLoader.Current = new CustomResourceTest(); this.InitializeComponent(); } } }
2、演示“ResourceDictionary”相关知识点
Resource/ResourceDictionary1.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <!-- 以 ResourceDictionary 为根节点 --> <Color x:Key="ColorRed">#FFFF0000</Color> <SolidColorBrush x:Key="BrushRed" Color="{ThemeResource ColorRed}" /> </ResourceDictionary>
Resource/ResourceDictionary2.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <!-- 以 ResourceDictionary 为根节点 --> <Color x:Key="ColorGreen">#FF00FF00</Color> <SolidColorBrush x:Key="BrushGreen" Color="{ThemeResource ColorGreen}" /> </ResourceDictionary>
Resource/ResourceDictionary3.xaml
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <!-- 以 ResourceDictionary 为根节点 --> <Color x:Key="ColorBlue">#FF0000FF</Color> <SolidColorBrush x:Key="BrushBlue" Color="{ThemeResource ColorBlue}" /> </ResourceDictionary>
Resource/ResourceDictionaryDemo.xaml
<Page x:Class="Windows10.Resource.ResourceDictionaryDemo" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows10.Resource" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Page.Resources> <!-- FrameworkElement.Resources 就是一个 ResourceDictionary 对象 1、在 ResourceDictionary 中可以一条一条地定义资源 2、可以设置 ResourceDictionary 的 Source 属性来引用一个以 ResourceDictionary 为根节点的 xaml 文件 3、通过 MergedDictionaries 可以集成多个 ResourceDictionary 4、通过 ThemeDictionaries 可以设置不同主题下的 ResourceDictionary,详见:ThemeResourceDemo.xaml --> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="ResourceDictionary1.xaml" /> <ResourceDictionary Source="ms-appx:///Resource/ResourceDictionary2.xaml" /> </ResourceDictionary.MergedDictionaries> <Color x:Key="ColorOrange">#FFFFA500</Color> <SolidColorBrush x:Key="BrushOrange" Color="{ThemeResource ColorOrange}" /> </ResourceDictionary> </Page.Resources> <Grid Background="Transparent"> <StackPanel Margin="10 0 10 10"> <TextBlock Name="textBlock1" Margin="5" Text="我是 TextBlock" Foreground="{StaticResource BrushRed}" /> <TextBlock Name="textBlock2" Margin="5" Text="我是 TextBlock" Foreground="{StaticResource BrushGreen}" /> <TextBlock Name="textBlock3" Margin="5" Text="我是 TextBlock" Foreground="{StaticResource BrushOrange}" /> <!-- 演示如何通过 C# 端引入新的 ResourceDictionary 并使用其中的资源 --> <TextBlock Name="textBlock4" Margin="5" Text="我是 TextBlock" /> <!-- 演示如何获取指定资源的值 --> <TextBlock Name="lblMsg" Margin="5" TextWrapping="Wrap" /> <Button Name="btnGetResourceValue" Margin="5" Content="获取指定资源的值" Click="btnGetResourceValue_Click" /> </StackPanel> </Grid> </Page>
Resource/ResourceDictionaryDemo.xaml.cs
/* * 演示“ResourceDictionary”相关知识点 */ using System; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Media; namespace Windows10.Resource { public sealed partial class ResourceDictionaryDemo : Page { public ResourceDictionaryDemo() { this.InitializeComponent(); this.Loaded += ResourceDictionaryDemo_Loaded; } private void ResourceDictionaryDemo_Loaded(object sender, RoutedEventArgs e) { // 实例化一个 ResourceDictionary ResourceDictionary rd = new ResourceDictionary { Source = new Uri("ms-appx:///Resource/ResourceDictionary3.xaml", UriKind.Absolute) }; // 将指定的 ResourceDictionary 集成到 Page.Resources 内的资源字典中 this.Resources.MergedDictionaries.Add(rd); // 使用上面集成进来的资源字典中的资源 textBlock4.Foreground = (SolidColorBrush)this.Resources["BrushBlue"]; /* * 上面的例子演示的是如何处理指定的 FrameworkElement 中的资源 * 如果需要处理 application 级的资源的话,可以通过 Application.Current.Resources 来获取 application 级的资源(对应的 xaml 为 App.xaml) */ } private void btnGetResourceValue_Click(object sender, RoutedEventArgs e) { // 获取 application 级的指定资源的值 lblMsg.Text = "SystemAccentColor: " + Application.Current.Resources["SystemAccentColor"].ToString(); lblMsg.Text += Environment.NewLine; // 获取指定 ResourceDictionary 中的指定资源的值 lblMsg.Text += "Page.Resources 中的 ColorRed 的值: " + this.Resources["ColorRed"].ToString(); lblMsg.Text += Environment.NewLine; // 获取指定 ResourceDictionary 中的指定资源的值 ResourceDictionary resourceDictionary1 = this.Resources.MergedDictionaries[0]; lblMsg.Text += "Page.Resources.MergedDictionaries[0] 中的 ColorRed 的值: " + resourceDictionary1["ColorRed"].ToString(); } } }
3、演示如何加载并使用外部的 ResourceDictionary
Resource/RemoteResource.xaml
<Page x:Class="Windows10.Resource.RemoteResource" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:Windows10.Resource" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <Page.Resources> <Color x:Key="ColorOrange">#FFFFA500</Color> <SolidColorBrush x:Key="BrushOrange" Color="{ThemeResource ColorOrange}" /> </Page.Resources> <Grid Background="Transparent"> <StackPanel Margin="10 0 10 10"> <TextBlock Name="textBlock" Margin="5" Text="我是 TextBlock" Foreground="{StaticResource BrushOrange}" /> <!-- 加载并使用远程 ResourceDictionary 中的资源 --> <Button Name="btnLoadRemoteResource" Content="加载并使用远程 ResourceDictionary 中的资源" Margin="5" Click="btnLoadRemoteResource_Click" /> </StackPanel> </Grid> </Page>
Resource/RemoteResource.xaml.cs
/* * 演示如何加载并使用外部的 ResourceDictionary */ using System; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Markup; using Windows.UI.Xaml.Media; using Windows.Web.Http; namespace Windows10.Resource { public sealed partial class RemoteResource : Page { // 需要加载的 ResourceDictionary 的 http 地址 string resourceDictionaryUrl = "http://localhost:44914/xaml/ResourceDictionary.txt"; public RemoteResource() { this.InitializeComponent(); } private async void btnLoadRemoteResource_Click(object sender, RoutedEventArgs e) { // 下载远程的 ResourceDictionary 文件 HttpClient client = new HttpClient(); string resourceDictionaryString = await client.GetStringAsync(new Uri(resourceDictionaryUrl, UriKind.Absolute)); // 将字符串转换为 ResourceDictionary 对象 ResourceDictionary resourceDictionary = XamlReader.Load(resourceDictionaryString) as ResourceDictionary; // 将指定的 ResourceDictionary 集成到 Page.Resources 内的资源字典中 this.Resources.MergedDictionaries.Add(resourceDictionary); // 使用远程 ResourceDictionary 中的资源 textBlock.Foreground = (SolidColorBrush)this.Resources["BrushGreen"]; } } }
http://localhost:44914/xaml/ResourceDictionary.txt
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <Color x:Key="ColorGreen">#FF00FF00</Color> <SolidColorBrush x:Key="BrushGreen" Color="{ThemeResource ColorGreen}" /> </ResourceDictionary>
时间: 2024-10-14 16:42:22