Fix Razor Pages antiforgery validation when `NormalizeUserIdClaimIssuer` is enabled

framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/AbpAspNetCoreMvcModule.cs

@@ -240,6 +240,10 @@ public class AbpAspNetCoreMvcModule : AbpModule
                 }
             });
 
+        context.Services
+            .AddOptions<RazorPagesOptions>()
+            .PostConfigure(AbpRazorPagesAntiforgeryConfiguration.Configure);
+
         context.Services
             .AddOptions<RazorPagesOptions>()
             .PostConfigure<IOptions<AbpRequestLocalizationOptions>>((pagesOptions, abpLocOptions) =>

framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/AntiForgery/AbpRazorPagesAntiforgeryConfiguration.cs

@@ -0,0 +1,30 @@
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.ApplicationModels;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace Volo.Abp.AspNetCore.Mvc.AntiForgery;
+
+public static class AbpRazorPagesAntiforgeryConfiguration
+{
+    public static void Configure(RazorPagesOptions options)
+    {
+        options.Conventions.AddFolderApplicationModelConvention("/", ReplaceAntiforgeryFilter);
+    }
+
+    private static void ReplaceAntiforgeryFilter(PageApplicationModel model)
+    {
+        for (var i = model.Filters.Count - 1; i >= 0; i--)
+        {
+            if (model.Filters[i] is AutoValidateAntiforgeryTokenAttribute)
+            {
+                model.Filters.RemoveAt(i);
+            }
+        }
+
+        if (!model.Filters.Any(f => f is AbpAutoValidateAntiforgeryTokenAttribute))
+        {
+            model.Filters.Add(new AbpAutoValidateAntiforgeryTokenAttribute());
+        }
+    }
+}