diff --git a/framework/src/Volo.Abp.AspNetCore/Microsoft/AspNetCore/Http/AbpHttpRequestExtensions.cs b/framework/src/Volo.Abp.AspNetCore/Microsoft/AspNetCore/Http/AbpHttpRequestExtensions.cs
index 4ccfdd23c1..e121f6c3f7 100644
--- a/framework/src/Volo.Abp.AspNetCore/Microsoft/AspNetCore/Http/AbpHttpRequestExtensions.cs
+++ b/framework/src/Volo.Abp.AspNetCore/Microsoft/AspNetCore/Http/AbpHttpRequestExtensions.cs
@@ -1,23 +1,18 @@
-using JetBrains.Annotations;
+using System;
+using JetBrains.Annotations;
+using Microsoft.Net.Http.Headers;
 using Volo.Abp;
 
 namespace Microsoft.AspNetCore.Http
 {
     public static class AbpHttpRequestExtensions
     {
-        private const string RequestedWithHeader = "X-Requested-With";
-        private const string XmlHttpRequest = "XMLHttpRequest";
-
         public static bool IsAjax([NotNull]this HttpRequest request)
         {
             Check.NotNull(request, nameof(request));
 
-            if (request.Headers == null)
-            {
-                return false;
-            }
-
-            return request.Headers[RequestedWithHeader] == XmlHttpRequest;
+            return string.Equals(request.Query[HeaderNames.XRequestedWith], "XMLHttpRequest", StringComparison.Ordinal) ||
+                   string.Equals(request.Headers[HeaderNames.XRequestedWith], "XMLHttpRequest", StringComparison.Ordinal);
         }
 
         public static bool CanAccept([NotNull]this HttpRequest request, [NotNull] string contentType)
@@ -25,7 +20,7 @@ namespace Microsoft.AspNetCore.Http
             Check.NotNull(request, nameof(request));
             Check.NotNull(contentType, nameof(contentType));
 
-            return request.Headers["Accept"].ToString().Contains(contentType);
+            return request.Headers[HeaderNames.Accept].ToString().Contains(contentType, StringComparison.OrdinalIgnoreCase);
         }
     }
 }