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Author: benaadams

src/Mvc/Mvc.Razor/src/RazorPageActivator.cs

@@ -44,6 +44,7 @@ public RazorPageActivator(
                 UrlHelperAccessor = context => urlHelperFactory.GetUrlHelper(context),
                 JsonHelperAccessor = context => jsonHelper,
                 DiagnosticListenerAccessor = context => diagnosticListener,
+                DiagnosticSourceAccessor = context => diagnosticListener,
                 HtmlEncoderAccessor = context => htmlEncoder,
                 ModelExpressionProviderAccessor = context => modelExpressionProvider,
             };

src/Mvc/Mvc.Razor/src/RazorPagePropertyActivator.cs

@@ -112,6 +112,10 @@ private static PropertyActivator<ViewContext> CreateActivateInfo(
             {
                 valueAccessor = valueAccessors.DiagnosticListenerAccessor;
             }
+            else if (property.PropertyType == typeof(DiagnosticSource))
+            {
+                valueAccessor = valueAccessors.DiagnosticSourceAccessor;
+            }
             else if (property.PropertyType == typeof(HtmlEncoder))
             {
                 valueAccessor = valueAccessors.HtmlEncoderAccessor;
@@ -143,6 +147,8 @@ public class PropertyValueAccessors
 
             public Func<ViewContext, object> DiagnosticListenerAccessor { get; set; }
 
+            public Func<ViewContext, object> DiagnosticSourceAccessor { get; set; }
+
             public Func<ViewContext, object> HtmlEncoderAccessor { get; set; }
 
             public Func<ViewContext, object> ModelExpressionProviderAccessor { get; set; }

src/Mvc/Mvc.RazorPages/src/Infrastructure/DefaultPageFactoryProvider.cs

@@ -35,6 +35,7 @@ public DefaultPageFactoryProvider(
                 UrlHelperAccessor = context => urlHelperFactory.GetUrlHelper(context),
                 JsonHelperAccessor = context => jsonHelper,
                 DiagnosticListenerAccessor = context => diagnosticListener,
+                DiagnosticSourceAccessor = context => diagnosticListener,
                 HtmlEncoderAccessor = context => htmlEncoder,
                 ModelExpressionProviderAccessor = context => modelExpressionProvider,
             };