Razor测试

CPF.Razor/CpfExtensions.cs

@@ -0,0 +1,41 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+
+using Microsoft.AspNetCore.Components;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+using System;
+
+namespace CPF.Razor
+{
+    public static class CpfExtensions
+    {
+        /// <summary>
+        /// Creates a component of type <typeparamref name="TComponent"/> and adds it as a child of <paramref name="parent"/>.
+        /// </summary>
+        /// <typeparam name="TComponent"></typeparam>
+        /// <param name="host"></param>
+        /// <param name="parent"></param>
+        public static void AddComponent<TComponent>(this IHost host, CPF.UIElement parent) where TComponent : IComponent
+        {
+            if (host is null)
+            {
+                throw new ArgumentNullException(nameof(host));
+            }
+
+            if (parent is null)
+            {
+                throw new ArgumentNullException(nameof(parent));
+            }
+
+            var services = host.Services;
+            var renderer = new CpfRenderer(services, services.GetRequiredService<ILoggerFactory>());
+
+            //// TODO: This call is an async call, but is called as "fire-and-forget," which is not ideal.
+            //// We need to figure out how to get Xamarin.Forms to run this startup code asynchronously, which
+            //// is how this method should be called.
+            renderer.AddComponent<TComponent>(new ElementHandler(renderer, parent)).ConfigureAwait(false);
+        }
+    }
+}