Add marker service

src/BlazorWebView/src/Maui/Android/AndroidWebKitWebViewManager.cs

@@ -3,6 +3,7 @@
 using System.IO;
 using Android.Webkit;
 using Microsoft.AspNetCore.Components.Web;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
 using AWebView = Android.Webkit.WebView;
 using AUri = Android.Net.Uri;
@@ -33,6 +34,14 @@ public class AndroidWebKitWebViewManager : WebViewManager
 		public AndroidWebKitWebViewManager(AWebView webview!!, IServiceProvider services, Dispatcher dispatcher, IFileProvider fileProvider, JSComponentConfigurationStore jsComponents, string hostPageRelativePath)
 			: base(services, dispatcher, new Uri(AppOrigin), fileProvider, jsComponents, hostPageRelativePath)
 		{
+#if WEBVIEW2_MAUI
+			if (services.GetService<MauiBlazorMarkerService>() is null)
+			{
+				throw new InvalidOperationException(
+					"Unable to find the required services. " +
+					$"Please add all the required services by calling '{nameof(IServiceCollection)}.{nameof(BlazorWebViewServiceCollectionExtensions.AddMauiBlazorWebView)}' in the application startup code.");
+			}
+#endif
 			_webview = webview;
 		}
 

src/BlazorWebView/src/Maui/MauiBlazorMarkerService.cs

@@ -0,0 +1,9 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Components.WebView.Maui
+{
+	internal class MauiBlazorMarkerService
+	{
+	}
+}

src/BlazorWebView/src/Maui/iOS/IOSWebViewManager.cs

@@ -5,6 +5,7 @@
 using System.Text.Encodings.Web;
 using Foundation;
 using Microsoft.AspNetCore.Components.Web;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.FileProviders;
 using UIKit;
 using WebKit;
@@ -33,6 +34,13 @@ public class IOSWebViewManager : WebViewManager
 		public IOSWebViewManager(BlazorWebViewHandler blazorMauiWebViewHandler!!, WKWebView webview!!, IServiceProvider provider, Dispatcher dispatcher, IFileProvider fileProvider, JSComponentConfigurationStore jsComponents, string hostPageRelativePath)
 			: base(provider, dispatcher, new Uri(BlazorWebViewHandler.AppOrigin), fileProvider, jsComponents, hostPageRelativePath)
 		{
+			if (provider.GetService<MauiBlazorMarkerService>() is null)
+			{
+				throw new InvalidOperationException(
+					"Unable to find the required services. " +
+					$"Please add all the required services by calling '{nameof(IServiceCollection)}.{nameof(BlazorWebViewServiceCollectionExtensions.AddMauiBlazorWebView)}' in the application startup code.");
+			}
+
 			_blazorMauiWebViewHandler = blazorMauiWebViewHandler;
 			_webview = webview;
 

src/BlazorWebView/src/SharedSource/BlazorWebViewServiceCollectionExtensions.cs

@@ -37,7 +37,12 @@ public static IServiceCollection AddMauiBlazorWebView(this IServiceCollection se
 			services.AddBlazorWebView();
 			services.TryAddSingleton(new BlazorWebViewDeveloperTools { Enabled = false });
 #if WEBVIEW2_MAUI
+			services.TryAddSingleton<MauiBlazorMarkerService>();
 			services.ConfigureMauiHandlers(static handlers => handlers.AddHandler<IBlazorWebView, BlazorWebViewHandler>());
+#elif WEBVIEW2_WINFORMS
+			services.TryAddSingleton<WindowsFormsBlazorMarkerService>();
+#elif WEBVIEW2_WPF
+			services.TryAddSingleton<WpfBlazorMarkerService>();
 #endif
 			return services;
 		}

src/BlazorWebView/src/SharedSource/WebView2WebViewManager.cs

@@ -18,19 +18,20 @@
 #if WEBVIEW2_WINFORMS
 using System.Diagnostics;
 using Microsoft.AspNetCore.Components.WebView.WindowsForms;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Web.WebView2;
 using Microsoft.Web.WebView2.Core;
 using WebView2Control = Microsoft.Web.WebView2.WinForms.WebView2;
-using Microsoft.Extensions.DependencyInjection;
 #elif WEBVIEW2_WPF
 using System.Diagnostics;
 using Microsoft.AspNetCore.Components.WebView.Wpf;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Web.WebView2;
 using Microsoft.Web.WebView2.Core;
 using WebView2Control = Microsoft.Web.WebView2.Wpf.WebView2;
-using Microsoft.Extensions.DependencyInjection;
 #elif WEBVIEW2_MAUI
 using Microsoft.AspNetCore.Components.WebView.Maui;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Web.WebView2.Core;
 using WebView2Control = Microsoft.UI.Xaml.Controls.WebView2;
 using System.Runtime.InteropServices.WindowsRuntime;
@@ -85,6 +86,22 @@ public WebView2WebViewManager(
 			: base(services, dispatcher, new Uri(AppOrigin), fileProvider, jsComponents, hostPageRelativePath)
 
 		{
+#if WEBVIEW2_WINFORMS
+			if (services.GetService<WindowsFormsBlazorMarkerService>() is null)
+			{
+				throw new InvalidOperationException(
+					"Unable to find the required services. " +
+					$"Please add all the required services by calling '{nameof(IServiceCollection)}.{nameof(BlazorWebViewServiceCollectionExtensions.AddWindowsFormsBlazorWebView)}' in the application startup code.");
+			}
+#elif WEBVIEW2_WPF
+			if (services.GetService<WpfBlazorMarkerService>() is null)
+			{
+				throw new InvalidOperationException(
+					"Unable to find the required services. " +
+					$"Please add all the required services by calling '{nameof(IServiceCollection)}.{nameof(BlazorWebViewServiceCollectionExtensions.AddWpfBlazorWebView)}' in the application startup code.");
+			}
+#endif
+
 			_webview = webview;
 			_externalNavigationStarting = externalNavigationStarting;
 			_developerTools = services.GetRequiredService<BlazorWebViewDeveloperTools>();
@@ -119,6 +136,13 @@ BlazorWebViewHandler blazorWebViewHandler
 		)
 			: base(services, dispatcher, new Uri(AppOrigin), fileProvider, jsComponents, hostPageRelativePath)
 		{
+			if (services.GetService<MauiBlazorMarkerService>() is null)
+			{
+				throw new InvalidOperationException(
+					"Unable to find the required services. " +
+					$"Please add all the required services by calling '{nameof(IServiceCollection)}.{nameof(BlazorWebViewServiceCollectionExtensions.AddMauiBlazorWebView)}' in the application startup code.");
+			}
+
 			_webview = webview;
 			_blazorWebViewHandler = blazorWebViewHandler;
 

src/BlazorWebView/src/WindowsForms/WindowsFormsBlazorMarkerService.cs

@@ -0,0 +1,9 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Components.WebView.WindowsForms
+{
+	internal class WindowsFormsBlazorMarkerService
+	{
+	}
+}

src/BlazorWebView/src/Wpf/WpfBlazorMarkerService.cs

@@ -0,0 +1,9 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+namespace Microsoft.AspNetCore.Components.WebView.Wpf
+{
+	internal class WpfBlazorMarkerService
+	{
+	}
+}