Add RazorPageFilter logging

Author: andrewlock

SerilogRequestLogging/SerilogLoggingPageFilter.cs

@@ -0,0 +1,26 @@
+using Microsoft.AspNetCore.Mvc.Filters;
+using Serilog;
+
+namespace SerilogRequestLogging
+{
+    public class SerilogLoggingPageFilter : IPageFilter
+    {
+        private readonly IDiagnosticContext _diagnosticContext;
+        public SerilogLoggingPageFilter(IDiagnosticContext diagnosticContext)
+        {
+            _diagnosticContext = diagnosticContext;
+        }
+        
+        public void OnPageHandlerSelected(PageHandlerSelectedContext context)
+        {
+            var name = context.HandlerMethod?.Name ?? context.HandlerMethod?.MethodInfo.Name;
+            if (name != null)
+            {
+                _diagnosticContext.Set("RazorPageHandler", name);
+            }
+        }
+
+        public void OnPageHandlerExecuted(PageHandlerExecutedContext context){}
+        public void OnPageHandlerExecuting(PageHandlerExecutingContext context) {}
+    }
+}

SerilogRequestLogging/Startup.cs

@@ -26,6 +26,7 @@ public void ConfigureServices(IServiceCollection services)
         {
             services.AddControllers(opts =>
             {
+                opts.Filters.Add<SerilogLoggingPageFilter>();
                 opts.Filters.Add<SerilogLoggingActionFilter>();
             });
             services.AddRazorPages();