chore: App 支持切换 net8/9

Author: ArgoZhang

src/BootstrapBlazor.Server/Components/App.razor

@@ -20,14 +20,7 @@
 
     @if (Env.IsSupportAssets())
     {
-        <link rel="stylesheet" href="@Assets["_content/BootstrapBlazor.FontAwesome/css/font-awesome.min.css"]" />
-        <link rel="stylesheet" href="@Assets["_content/BootstrapBlazor.MaterialDesign/css/md.min.css"]" />
-        <link rel="stylesheet" href="@Assets["_content/BootstrapBlazor.BootstrapIcon/css/bootstrap.min.css"]" />
-        <link rel="stylesheet" href="@Assets["_content/BootstrapBlazor/css/bootstrap.blazor.bundle.min.css"]" />
-        <link rel="stylesheet" href="@Assets["_content/BootstrapBlazor/css/motronic.min.css"]" />
-        <link rel="stylesheet" href="@Assets["BootstrapBlazor.Server.styles.css"]" />
-        <link rel="stylesheet" href="@Assets["css/site.css"]" />
-        <ImportMap></ImportMap>
+        @this.RenderAssets()
     }
     else
     {

src/BootstrapBlazor.Server/Extensions/StaticFileResponseContextExtensions.cs

@@ -3,8 +3,12 @@
 // See the LICENSE file in the project root for more information.
 // Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
 
+using Microsoft.AspNetCore.Components.Rendering;
 using Microsoft.AspNetCore.StaticFiles;
 using Microsoft.Net.Http.Headers;
+#if NET9_0_OR_GREATER
+using System.Reflection;
+#endif
 
 namespace BootstrapBlazor.Server.Extensions;
 
@@ -19,6 +23,44 @@ public static bool IsSupportAssets(this IWebHostEnvironment webHost)
 #endif
     }
 
+    /// <summary>
+    ///
+    /// </summary>
+    /// <returns></returns>
+    public static RenderFragment RenderAssets(this ComponentBase component) => builder =>
+    {
+#if NET9_0_OR_GREATER
+        var pi = component.GetType().GetProperty("Assets", BindingFlags.Instance | BindingFlags.NonPublic);
+        if (pi != null)
+        {
+            var v = pi.GetValue(component);
+            if (v is ResourceAssetCollection assets)
+            {
+                builder.RenderCss($"{assets["_content/BootstrapBlazor.FontAwesome/css/font-awesome.min.css"]}");
+                builder.RenderCss($"{assets["_content/BootstrapBlazor.MaterialDesign/css/md.min.css"]}");
+                builder.RenderCss($"{assets["_content/BootstrapBlazor.BootstrapIcon/css/bootstrap.min.css"]}");
+                builder.RenderCss($"{assets["_content/BootstrapBlazor/css/bootstrap.blazor.bundle.min.css"]}");
+                builder.RenderCss($"{assets["_content/BootstrapBlazor/css/motronic.min.css"]}");
+                builder.RenderCss($"{assets["BootstrapBlazor.Server.styles.css"]}");
+                builder.RenderCss($"{assets["css/site.css"]}");
+
+                builder.OpenComponent<ImportMap>(0);
+                builder.CloseComponent();
+            }
+        }
+#endif
+    };
+
+    private static void RenderCss(this RenderTreeBuilder builder, string url)
+    {
+#if NET9_0_OR_GREATER
+        builder.OpenElement(0, "link");
+        builder.AddAttribute(1, "rel", "stylesheet");
+        builder.AddAttribute(2, "href", url);
+        builder.CloseElement();
+#endif
+    }
+
     public static void ProcessCache(this StaticFileResponseContext context, IConfiguration configuration)
     {
         if (context.CanCache(configuration, out var age))