Injecting IViewLocalizer into Razor Page causing IndexOutOfRangeException

Fixes #6694

src/Microsoft.AspNetCore.Mvc.RazorPages/Internal/PageActionInvoker.cs

@@ -122,6 +122,7 @@ namespace Microsoft.AspNetCore.Mvc.RazorPages.Internal
                     _tempDataFactory.GetTempData(_pageContext.HttpContext),
                     TextWriter.Null,
                     _htmlHelperOptions);
+                _viewContext.ExecutingFilePath = _pageContext.ActionDescriptor.RelativePath;
 
                 _page = (Page)CacheEntry.PageFactory(_pageContext, _viewContext);
 
@@ -265,6 +266,7 @@ namespace Microsoft.AspNetCore.Mvc.RazorPages.Internal
                         _tempDataFactory.GetTempData(_pageContext.HttpContext),
                         TextWriter.Null,
                         _htmlHelperOptions);
+                    _viewContext.ExecutingFilePath = _pageContext.ActionDescriptor.RelativePath;
                 }
 
                 if (_page == null)

test/Microsoft.AspNetCore.Mvc.FunctionalTests/RazorPagesTest.cs

@@ -1115,6 +1115,30 @@ Microsoft.AspNetCore.Mvc.ViewFeatures.ViewDataDictionary`1[AspNetCore._InjectedP
             Assert.Equal(expected, (await response.Content.ReadAsStringAsync()).Trim());
         }
 
+        [Fact]
+        public async Task ViewLocalizer_WorksForPagesWithoutModel()
+        {
+            // Arrange
+            var expected = "Bon Jour from Page";
+
+            // Act
+            var response = await Client.GetStringAsync("/Pages/Localized/Page?culture=fr-FR");
+
+            Assert.Equal(expected, response.Trim());
+        }
+
+        [Fact]
+        public async Task ViewLocalizer_WorksForPagesWithModel()
+        {
+            // Arrange
+            var expected = "Bon Jour from PageWithModel";
+
+            // Act
+            var response = await Client.GetStringAsync("/Pages/Localized/PageWithModel?culture=fr-FR");
+
+            Assert.Equal(expected, response.Trim());
+        }
+
         private async Task AddAntiforgeryHeaders(HttpRequestMessage request)
         {
             var getResponse = await Client.GetAsync(request.RequestUri);

test/Microsoft.AspNetCore.Mvc.RazorPages.Test/Internal/PageActionInvokerTest.cs

@@ -356,6 +356,32 @@ namespace Microsoft.AspNetCore.Mvc.RazorPages.Internal
             Assert.Same(pageModel.PageContext.ViewData, pageResult.ViewData);
         }
 
+        [Fact]
+        public async Task InvokeAction_WithPage_SetsExecutingFilePath()
+        {
+            // Arrange
+            var relativePath = "/Pages/Users/Show.cshtml";
+            var descriptor = CreateDescriptorForSimplePage();
+            descriptor.RelativePath = relativePath;
+
+            object instance = null;
+            var pageFilter = new Mock<IPageFilter>();
+            AllowSelector(pageFilter);
+            pageFilter
+                .Setup(f => f.OnPageHandlerExecuting(It.IsAny<PageHandlerExecutingContext>()))
+                .Callback<PageHandlerExecutingContext>(c =>
+                {
+                    instance = c.HandlerInstance;
+                });
+            var invoker = CreateInvoker(new[] { pageFilter.Object }, descriptor);
+
+            // Act
+            await invoker.InvokeAsync();
+
+            // Assert
+            var page = Assert.IsType<TestPage>(instance);
+            Assert.Equal(relativePath, page.ViewContext.ExecutingFilePath);
+        }
         #endregion
 
         #region Handler Selection

test/WebSites/RazorPagesWebSite/Pages/Localized/Page.cshtml

@@ -0,0 +1,3 @@
+@page
+@inject Microsoft.AspNetCore.Mvc.Localization.IViewLocalizer Localizer
+@Localizer["Hello"]

test/WebSites/RazorPagesWebSite/Pages/Localized/Page.fr-FR.resx

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Hello" xml:space="preserve">
+    <value>Bon Jour from Page</value>
+  </data>
+</root>

test/WebSites/RazorPagesWebSite/Pages/Localized/PageWithModel.cs

@@ -0,0 +1,13 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace RazorPagesWebSite.Pages.Localized
+{
+    public class PageWithModel : PageModel
+    {
+        public IActionResult OnGet() => Page();
+    }
+}

test/WebSites/RazorPagesWebSite/Pages/Localized/PageWithModel.cshtml

@@ -0,0 +1,4 @@
+@page
+@model PageWithModel
+@inject Microsoft.AspNetCore.Mvc.Localization.IViewLocalizer Localizer
+@Localizer["Hello"]

test/WebSites/RazorPagesWebSite/Pages/Localized/PageWithModel.fr-FR.resx

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <data name="Hello" xml:space="preserve">
+    <value>Bon Jour from PageWithModel</value>
+  </data>
+</root>

test/WebSites/RazorPagesWebSite/Startup.cs

@@ -1,6 +1,7 @@
 // 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.
 
+using System.Globalization;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.Extensions.DependencyInjection;
@@ -13,7 +14,7 @@ namespace RazorPagesWebSite
         {
             services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme).AddCookie(options => options.LoginPath = "/Login");
             services.AddMvc()
-                .AddCookieTempDataProvider()
+                .AddViewLocalization()
                 .AddRazorPagesOptions(options =>
                 {
                     options.Conventions.AuthorizePage("/HelloWorldWithAuth");
@@ -31,6 +32,18 @@ namespace RazorPagesWebSite
 
             app.UseStaticFiles();
 
+            var supportedCultures = new[]
+            {
+                new CultureInfo("en-US"),
+                new CultureInfo("fr-FR"),
+            };
+
+            app.UseRequestLocalization(new RequestLocalizationOptions
+            {
+                SupportedCultures = supportedCultures,
+                SupportedUICultures = supportedCultures
+            });
+
             app.UseMvc();
         }
     }