diff --git a/src/Sagara.Core.AspNetCore/Extensions/PageModelExtensions.cs b/src/Sagara.Core.AspNetCore/Extensions/PageModelExtensions.cs
new file mode 100644
index 0000000..cd6bf12
--- /dev/null
+++ b/src/Sagara.Core.AspNetCore/Extensions/PageModelExtensions.cs
@@ -0,0 +1,26 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace Sagara.Core.AspNetCore.Extensions;
+
+public static class PageModelExtensions
+{
+    /// <summary>
+    /// Send a JsonResult whose object has a redirect property containing the URL that the client JavaScript should
+    /// redirect the browser to.
+    /// </summary>
+    /// <param name="pageModel">The PageModel object.</param>
+    /// <param name="pageName">The target page name.</param>
+    /// <param name="pageHandler">The page handler, if any.</param>
+    /// <param name="values">Route values, if any.</param>
+    public static JsonResult RedirectToPageJson<TPageModel>(this TPageModel pageModel, string pageName, string? pageHandler = null, object? values = null)
+        where TPageModel : PageModel
+    {
+        Check.NotNull(pageModel);
+
+        return new JsonResult(new
+        {
+            redirect = pageModel.Url.Page(pageName: pageName, pageHandler: pageHandler, values: values)
+        });
+    }
+}
diff --git a/src/Sagara.Core.AspNetCore/Filters/UnhandledExceptionFilter.cs b/src/Sagara.Core.AspNetCore/Filters/UnhandledExceptionFilter.cs
index aceeae7..dbfd727 100644
--- a/src/Sagara.Core.AspNetCore/Filters/UnhandledExceptionFilter.cs
+++ b/src/Sagara.Core.AspNetCore/Filters/UnhandledExceptionFilter.cs
@@ -70,7 +70,7 @@ public void OnException(ExceptionContext context)
             log.AppendLine(CultureInfo.InvariantCulture, $"    Raw URL: {context.HttpContext.Request.GetEncodedUrl()}");
         }
 
-        UnhandledExceptionFilterLogger.UnhandledException(_logger, context.Exception, log.ToString());
+        _logger.UnhandledException(context.Exception, log.ToString());
 
         // Don't set it to handled. Let it continue through the pipeline.
     }
@@ -82,5 +82,5 @@ public void OnException(ExceptionContext context)
 internal static partial class UnhandledExceptionFilterLogger
 {
     [LoggerMessage(EventId = 0, Level = LogLevel.Error, Message = "{message}")]
-    public static partial void UnhandledException(ILogger logger, Exception ex, string message);
+    public static partial void UnhandledException(this ILogger logger, Exception ex, string message);
 }
diff --git a/src/Sagara.Core.AspNetCore/docs/Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md b/src/Sagara.Core.AspNetCore/docs/Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md
new file mode 100644
index 0000000..5288fe3
--- /dev/null
+++ b/src/Sagara.Core.AspNetCore/docs/Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md
@@ -0,0 +1,56 @@
+#### [Sagara.Core.AspNetCore](index.md 'index')
+### [Sagara.Core.AspNetCore.Extensions](index.md#Sagara.Core.AspNetCore.Extensions 'Sagara.Core.AspNetCore.Extensions')
+
+## PageModelExtensions Class
+
+```csharp
+public static class PageModelExtensions
+```
+
+Inheritance [System.Object](https://docs.microsoft.com/en-us/dotnet/api/System.Object 'System.Object') &#129106; PageModelExtensions
+### Methods
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object)'></a>
+
+## PageModelExtensions.RedirectToPageJson<TPageModel>(this TPageModel, string, string, object) Method
+
+Send a JsonResult whose object has a redirect property containing the URL that the client JavaScript should  
+redirect the browser to.
+
+```csharp
+public static Microsoft.AspNetCore.Mvc.JsonResult RedirectToPageJson<TPageModel>(this TPageModel pageModel, string pageName, string? pageHandler=null, object? values=null)
+    where TPageModel : Microsoft.AspNetCore.Mvc.RazorPages.PageModel;
+```
+#### Type parameters
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).TPageModel'></a>
+
+`TPageModel`
+#### Parameters
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).pageModel'></a>
+
+`pageModel` [TPageModel](Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md#Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).TPageModel 'Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson<TPageModel>(this TPageModel, string, string, object).TPageModel')
+
+The PageModel object.
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).pageName'></a>
+
+`pageName` [System.String](https://docs.microsoft.com/en-us/dotnet/api/System.String 'System.String')
+
+The target page name.
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).pageHandler'></a>
+
+`pageHandler` [System.String](https://docs.microsoft.com/en-us/dotnet/api/System.String 'System.String')
+
+The page handler, if any.
+
+<a name='Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object).values'></a>
+
+`values` [System.Object](https://docs.microsoft.com/en-us/dotnet/api/System.Object 'System.Object')
+
+Route values, if any.
+
+#### Returns
+[Microsoft.AspNetCore.Mvc.JsonResult](https://docs.microsoft.com/en-us/dotnet/api/Microsoft.AspNetCore.Mvc.JsonResult 'Microsoft.AspNetCore.Mvc.JsonResult')
\ No newline at end of file
diff --git a/src/Sagara.Core.AspNetCore/docs/index.md b/src/Sagara.Core.AspNetCore/docs/index.md
index d8dd883..03eb72c 100644
--- a/src/Sagara.Core.AspNetCore/docs/index.md
+++ b/src/Sagara.Core.AspNetCore/docs/index.md
@@ -3,6 +3,13 @@
 ## Sagara.Core.AspNetCore Assembly
 ### Namespaces
 
+<a name='Sagara.Core.AspNetCore.Extensions'></a>
+
+## Sagara.Core.AspNetCore.Extensions Namespace
+- **[PageModelExtensions](Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md 'Sagara.Core.AspNetCore.Extensions.PageModelExtensions')** `Class`
+  - **[RedirectToPageJson&lt;TPageModel&gt;(this TPageModel, string, string, object)](Sagara.Core.AspNetCore.Extensions.PageModelExtensions.md#Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson_TPageModel_(thisTPageModel,string,string,object) 'Sagara.Core.AspNetCore.Extensions.PageModelExtensions.RedirectToPageJson<TPageModel>(this TPageModel, string, string, object)')** `Method` Send a JsonResult whose object has a redirect property containing the URL that the client JavaScript should  
+    redirect the browser to.
+
 <a name='Sagara.Core.AspNetCore.Filters'></a>
 
 ## Sagara.Core.AspNetCore.Filters Namespace