diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper.cs b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper.cs
index cfc8754415..0bd4c43173 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper.cs
@@ -5,33 +5,33 @@ namespace Volo.Abp.AspNetCore.Mvc.ModelBinding
     public static class ExtraPropertyBindingHelper
     {
         /// <summary>
-        /// modelName is a string like "UserInfo.ExtraProperties[SocialSecurityNumber]"
+        /// <paramref name="expression"/> is a string like "UserInfo.ExtraProperties[SocialSecurityNumber]"
         /// This method returns "SocialSecurityNumber" for this example. */
         /// </summary>
-        public static string ExtractExtraPropertyName(string modelName)
+        public static string ExtractExtraPropertyName(string expression)
         {
-            var index = modelName.IndexOf(".ExtraProperties[", StringComparison.Ordinal);
+            var index = expression.IndexOf("ExtraProperties[", StringComparison.Ordinal);
             if (index < 0)
             {
                 return null;
             }
 
-            return modelName.Substring(index + 17, modelName.Length - index - 18);
+            return expression.Substring(index + 16, expression.Length - index - 17);
         }
 
         /// <summary>
-        /// modelName is a string like "UserInfo.ExtraProperties[SocialSecurityNumber]"
+        /// <paramref name="expression"/> is a string like "UserInfo.ExtraProperties[SocialSecurityNumber]"
         /// This method returns "UserInfo" for this example.
         /// </summary>
-        public static string ExtractContainerName(string modelName)
+        public static string ExtractContainerName(string expression)
         {
-            var index = modelName.IndexOf(".ExtraProperties[", StringComparison.Ordinal);
+            var index = expression.IndexOf("ExtraProperties[", StringComparison.Ordinal);
             if (index < 0)
             {
                 return null;
             }
 
-            return modelName.Left(index);
+            return expression.Left(index).TrimEnd('.');
         }
     }
 }
diff --git a/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper_Tests.cs b/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper_Tests.cs
new file mode 100644
index 0000000000..4f96fae3f5
--- /dev/null
+++ b/framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/ModelBinding/ExtraPropertyBindingHelper_Tests.cs
@@ -0,0 +1,48 @@
+using Shouldly;
+using Xunit;
+
+namespace Volo.Abp.AspNetCore.Mvc.ModelBinding
+{
+    public class ExtraPropertyBindingHelper_Tests
+    {
+        [Fact]
+        public void ExtractExtraPropertyName_Tests()
+        {
+            ExtraPropertyBindingHelper.ExtractExtraPropertyName(
+                "MyObject.UserInfo.ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("SocialSecurityNumber");
+
+            ExtraPropertyBindingHelper.ExtractExtraPropertyName(
+                "UserInfo.ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("SocialSecurityNumber");
+
+            ExtraPropertyBindingHelper.ExtractExtraPropertyName(
+                "ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("SocialSecurityNumber");
+
+            ExtraPropertyBindingHelper.ExtractExtraPropertyName(
+                "SocialSecurityNumber"
+            ).ShouldBeNull();
+        }
+
+        [Fact]
+        public void ExtractContainerName_Tests()
+        {
+            ExtraPropertyBindingHelper.ExtractContainerName(
+                "MyObject.UserInfo.ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("MyObject.UserInfo");
+
+            ExtraPropertyBindingHelper.ExtractContainerName(
+                "UserInfo.ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("UserInfo");
+
+            ExtraPropertyBindingHelper.ExtractContainerName(
+                "ExtraProperties[SocialSecurityNumber]"
+            ).ShouldBe("");
+
+            ExtraPropertyBindingHelper.ExtractContainerName(
+                "SocialSecurityNumber"
+            ).ShouldBeNull();
+        }
+    }
+}