编辑文件位置

chatclient/App.xaml

@@ -4,7 +4,7 @@
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
             xmlns:local="clr-namespace:chatclient"
             StartupUri="MainWindow.xaml">
-   <Application.Resources>
+    <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
                 <materialDesign:BundledTheme BaseTheme="Light" PrimaryColor="DeepPurple" SecondaryColor="Lime" />
@@ -14,6 +14,17 @@
                 <ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml" />
                 <ResourceDictionary Source="pack://application:,,,/chatclient;component/Data/MaterialTrayMenuItem.xaml" />
             </ResourceDictionary.MergedDictionaries>
+            <!-- Material Design 字体覆盖 -->
+            <FontFamily x:Key="MaterialDesignFont">pack://application:,,,/chatclient;component/Fonts/HarmonyOS_Sans_Semibold.ttf#HarmonyOS Sans SC</FontFamily>
+            <!-- 添加 HarmonyOS Sans 字体资源 -->
+            <FontFamily x:Key="HarmonyOSSans">pack://application:,,,/chatclient;component/Fonts/HarmonyOS_Sans_Semibold.ttf#HarmonyOS Sans SC</FontFamily>
+            <!-- 设置全局字体 -->
+            <Style TargetType="TextElement">
+                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSSans}" />
+            </Style>
+            <Style TargetType="Control">
+                <Setter Property="FontFamily" Value="{StaticResource HarmonyOSSans}" />
+            </Style>
         </ResourceDictionary>
     </Application.Resources>
 </Application>