net core 方法 返回值 重改？

using BFManage.Util;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Filters;

namespace BFManage.Api
{
    /// <summary>
    /// 若Action返回对象为自定义对象,则将其转为JSON
    /// </summary>
    public class FormatResponseAttribute : BaseActionFilter, IActionFilter
    {
        /// <summary>
        /// Action执行之前执行
        /// </summary>
        /// <param name="context">过滤器上下文</param>
        public void OnActionExecuting(ActionExecutingContext context)
        {

        }

        /// <summary>
        /// Action执行完毕之后执行
        /// </summary>
        /// <param name="context"></param>
        public void OnActionExecuted(ActionExecutedContext context)
        {
            if (context.ContainsFilter<NoJsonParamterAttribute>())
                return;

            if (context.Result is EmptyResult)
                context.Result = Success();
            else if (context.Result is ObjectResult res)
            {
                if (res.Value is AjaxResult)
                    context.Result = JsonContent(res.Value.ToJson());
                else
                    context.Result = Success(res.Value);
            }
        }
    }
}

using BFManage.Business;
using BFManage.Util;
using Microsoft.AspNetCore.Mvc;
using System;

namespace BFManage.Api
{
    public abstract class BaseActionFilter : Attribute
    {
        public IOperator Operator { get => AutofacHelper.GetScopeService<IOperator>(); }

        /// <summary>
        /// 返回JSON
        /// </summary>
        /// <param name="json">json字符串</param>
        /// <returns></returns>
        public ContentResult JsonContent(string json)
        {
            return new ContentResult { Content = json, StatusCode = 200, ContentType = "application/json; charset=utf-8" };
        }

        /// <summary>
        /// 返回成功
        /// </summary>
        /// <returns></returns>
        public ContentResult Success()
        {
            AjaxResult res = new AjaxResult
            {
                Success = true,
                Msg = "请求成功！"
            };

            return JsonContent(res.ToJson());
        }

        /// <summary>
        /// 返回成功
        /// </summary>
        /// <param name="msg">消息</param>
        /// <returns></returns>
        public ContentResult Success(string msg)
        {
            AjaxResult res = new AjaxResult
            {
                Success = true,
                Msg = msg
            };

            return JsonContent(res.ToJson());
        }

        /// <summary>
        /// 返回成功
        /// </summary>
        /// <param name="data">返回的数据</param>
        /// <returns></returns>
        public ContentResult Success<T>(T data)
        {
            AjaxResult<T> res = new AjaxResult<T>
            {
                Success = true,
                Msg = "请求成功！",
                Data = data
            };

            return JsonContent(res.ToJson());
        }

        /// <summary>
        /// 返回错误
        /// </summary>
        /// <returns></returns>
        public ContentResult Error()
        {
            AjaxResult res = new AjaxResult
            {
                Success = false,
                Msg = "请求失败！"
            };

            return JsonContent(res.ToJson());
        }

        /// <summary>
        /// 返回错误
        /// </summary>
        /// <param name="msg">错误提示</param>
        /// <returns></returns>
        public ContentResult Error(string msg)
        {
            AjaxResult res = new AjaxResult
            {
                Success = false,
                Msg = msg,
            };

            return JsonContent(res.ToJson());
        }

        /// <summary>
        /// 返回错误
        /// </summary>
        /// <param name="msg">错误提示</param>
        /// <param name="errorCode">错误代码</param>
        /// <returns></returns>
        public ContentResult Error(string msg, int errorCode)
        {
            AjaxResult res = new AjaxResult
            {
                Success = false,
                Msg = msg,
                ErrorCode = errorCode
            };

            return JsonContent(res.ToJson());
        }
    }
}