diff --git a/src/BootstrapBlazor/Components/ValidateForm/ValidateForm.razor.cs b/src/BootstrapBlazor/Components/ValidateForm/ValidateForm.razor.cs
index 5333e8be2b4..315a1cb9d58 100644
--- a/src/BootstrapBlazor/Components/ValidateForm/ValidateForm.razor.cs
+++ b/src/BootstrapBlazor/Components/ValidateForm/ValidateForm.razor.cs
@@ -385,10 +385,6 @@ private void ValidateDataAnnotations(object? value, ValidationContext context, L
             var result = rule.GetValidationResult(value, context);
             if (result != null && result != ValidationResult.Success)
             {
-                // 查找 resource 资源文件中的 ErrorMessage
-                var ruleNameSpan = rule.GetType().Name.AsSpan();
-                var index = ruleNameSpan.IndexOf(attributeSpan, StringComparison.OrdinalIgnoreCase);
-                var ruleName = ruleNameSpan[..index];
                 var find = false;
                 if (!string.IsNullOrEmpty(rule.ErrorMessage))
                 {
@@ -400,29 +396,36 @@ private void ValidateDataAnnotations(object? value, ValidationContext context, L
                     }
                 }
 
-                // 通过设置 ErrorMessage 检索
-                if (!context.ObjectType.Assembly.IsDynamic && !find
-                    && !string.IsNullOrEmpty(rule.ErrorMessage)
-                    && LocalizerFactory.Create(context.ObjectType).TryGetLocalizerString(rule.ErrorMessage, out var msg))
+                if (!context.ObjectType.Assembly.IsDynamic)
                 {
-                    rule.ErrorMessage = msg;
-                    find = true;
-                }
+                    if (!find && !string.IsNullOrEmpty(rule.ErrorMessage)
+                        && LocalizerFactory.Create(context.ObjectType).TryGetLocalizerString(rule.ErrorMessage, out var msg))
+                    {
+                        // 通过设置 ErrorMessage 检索
+                        rule.ErrorMessage = msg;
+                        find = true;
+                    }
 
-                // 通过 Attribute 检索
-                if (!rule.GetType().Assembly.IsDynamic && !find
-                    && LocalizerFactory.Create(rule.GetType()).TryGetLocalizerString(nameof(rule.ErrorMessage), out msg))
-                {
-                    rule.ErrorMessage = msg;
-                    find = true;
-                }
+                    if (!find && LocalizerFactory.Create(rule.GetType()).TryGetLocalizerString(nameof(rule.ErrorMessage), out msg))
+                    {
+                        // 通过 Attribute 检索
+                        rule.ErrorMessage = msg;
+                        find = true;
+                    }
 
-                // 通过 字段.规则名称 检索
-                if (!context.ObjectType.Assembly.IsDynamic && !find
-                    && LocalizerFactory.Create(context.ObjectType).TryGetLocalizerString($"{memberName}.{ruleName.ToString()}", out msg))
-                {
-                    rule.ErrorMessage = msg;
-                    find = true;
+                    if (!find)
+                    {
+                        // 通过 字段.规则名称 检索
+                        // 查找 resource 资源文件中的 ErrorMessage
+                        var ruleNameSpan = rule.GetType().Name.AsSpan();
+                        var index = ruleNameSpan.IndexOf(attributeSpan, StringComparison.OrdinalIgnoreCase);
+                        var ruleName = index == -1 ? ruleNameSpan[..] : ruleNameSpan[..index];
+                        if (LocalizerFactory.Create(context.ObjectType).TryGetLocalizerString($"{memberName}.{ruleName.ToString()}", out msg))
+                        {
+                            rule.ErrorMessage = msg;
+                            find = true;
+                        }
+                    }
                 }
 
                 if (!find)
diff --git a/test/UnitTest/Components/ValidateFormTest.cs b/test/UnitTest/Components/ValidateFormTest.cs
index 06ab0abf5cc..806b13d5400 100644
--- a/test/UnitTest/Components/ValidateFormTest.cs
+++ b/test/UnitTest/Components/ValidateFormTest.cs
@@ -566,6 +566,27 @@ public async Task Validate_Service_Ok()
         var msg = cut.FindComponent<MockInput<string>>().Instance.GetErrorMessage();
         Assert.Equal(HasServiceAttribute.Success, msg);
     }
+    
+    [Fact]
+    public async Task TestService_Ok()
+    {
+        // 自定义验证规则没有使用约定 Attribute 结尾单元测试
+        var foo = new HasService();
+        var cut = Context.RenderComponent<ValidateForm>(pb =>
+        {
+            pb.Add(a => a.Model, foo);
+            pb.AddChildContent<MockInput<string>>(pb =>
+            {
+                pb.Add(a => a.Value, foo.Tag2);
+                pb.Add(a => a.ValueExpression, Utility.GenerateValueExpression(foo, "Tag2", typeof(string)));
+                pb.Add(a => a.ValidateRules, [new FormItemValidator(new TestValidateRule())]);
+            });
+        });
+        var form = cut.Find("form");
+        await cut.InvokeAsync(() => form.Submit());
+        var msg = cut.FindComponent<MockInput<string>>().Instance.GetErrorMessage();
+        Assert.Equal("Test", msg);
+    }
 
     [Fact]
     public async Task RequiredValidator_Ok()
@@ -726,7 +747,7 @@ public void ShowAllInvalidResult_Ok()
     private class HasServiceAttribute : ValidationAttribute
     {
         public const string Success = "Has Service";
-        public const string Error = "No Service";
+        private const string Error = "No Service";
 
         protected override ValidationResult? IsValid(object? value, ValidationContext validationContext)
         {
@@ -738,10 +759,21 @@ private class HasServiceAttribute : ValidationAttribute
         }
     }
 
+    private class TestValidateRule : ValidationAttribute
+    {
+        protected override ValidationResult? IsValid(object? value, ValidationContext validationContext)
+        {
+            return new("Test");
+        }
+    }
+
     private class HasService
     {
         [HasService]
         public string? Tag { get; set; }
+        
+        [TestValidateRule]
+        public string? Tag2 { get; set; }
     }
 
     [MetadataType(typeof(DummyMetadata))]