Refactor property conversion logic to TypeHelper

Moved the primitive type conversion logic from HasExtraPropertiesExtensions.GetProperty<TProperty> to a new TypeHelper.ChangeTypePrimitiveExtended<TProperty> method. This centralizes and simplifies type conversion, improving code maintainability and reuse.

framework/src/Volo.Abp.Core/Volo/Abp/Reflection/TypeHelper.cs

@@ -80,6 +80,37 @@ public static class TypeHelper
         return false;
     }
 
+    public static TProperty? ChangeTypePrimitiveExtended<TProperty>(object? value)
+    {
+        if (value == null)
+        {
+            return default;
+        }
+        
+        if (IsPrimitiveExtended(typeof(TProperty), includeEnums: true))
+        {
+            var conversionType = typeof(TProperty);
+            if (IsNullable(conversionType))
+            {
+                conversionType = conversionType.GetFirstGenericArgumentIfNullable();
+            }
+
+            if (conversionType == typeof(Guid))
+            {
+                return (TProperty)TypeDescriptor.GetConverter(conversionType).ConvertFromInvariantString(value.ToString()!)!;
+            }
+
+            if (conversionType.IsEnum)
+            {
+                return (TProperty)Enum.Parse(conversionType, value.ToString()!);
+            }
+
+            return (TProperty)Convert.ChangeType(value, conversionType, CultureInfo.InvariantCulture);
+        }
+
+        throw new AbpException("ChangeTypePrimitiveExtended<TProperty> does not support non-primitive types. Use non-generic GetProperty method and handle type casting manually.");
+    }
+
     public static bool IsNullable(Type type)
     {
         return type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>);

framework/src/Volo.Abp.ObjectExtending/Volo/Abp/Data/HasExtraPropertiesExtensions.cs

@@ -26,34 +26,9 @@ public static class HasExtraPropertiesExtensions
 
     public static TProperty? GetProperty<TProperty>(this IHasExtraProperties source, string name, TProperty? defaultValue = default)
     {
-        var value = source.GetProperty(name);
-        if (value == null)
-        {
-            return defaultValue;
-        }
-
-        if (TypeHelper.IsPrimitiveExtended(typeof(TProperty), includeEnums: true))
-        {
-            var conversionType = typeof(TProperty);
-            if (TypeHelper.IsNullable(conversionType))
-            {
-                conversionType = conversionType.GetFirstGenericArgumentIfNullable();
-            }
-
-            if (conversionType == typeof(Guid))
-            {
-                return (TProperty)TypeDescriptor.GetConverter(conversionType).ConvertFromInvariantString(value.ToString()!)!;
-            }
-
-            if (conversionType.IsEnum)
-            {
-                return (TProperty)Enum.Parse(conversionType, value.ToString()!);
-            }
-
-            return (TProperty)Convert.ChangeType(value, conversionType, CultureInfo.InvariantCulture);
-        }
-
-        throw new AbpException("GetProperty<TProperty> does not support non-primitive types. Use non-generic GetProperty method and handle type casting manually.");
+        return TypeHelper.ChangeTypePrimitiveExtended<TProperty>(
+            source.GetProperty(name, (object?) defaultValue)
+        ) ?? defaultValue;
     }
 
     public static TSource SetProperty<TSource>(