webAPI过滤器返回数据加密

项目需求：

　　接口返回的数据，存在一些敏感信息，不希望其他用户看到，将Data进行加密传输

代码如下：

    public class EncryptDataFilterAttribute : ActionFilterAttribute
    {
        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {

            base.OnActionExecuted(actionExecutedContext);

            var actionList=actionExecutedContext.ActionContext.ActionDescriptor.GetCustomAttributes<EncryptDataAttribute>();
            var controllList= actionExecutedContext.ActionContext.ControllerContext.ControllerDescriptor.GetCustomAttributes<EncryptDataAttribute>();

            if (actionList.Any()||controllList.Any())
            {
                if (((System.Net.Http.ObjectContent)actionExecutedContext.Response.Content).Value is AjaxResCode)
                {
                    AjaxResCode result = actionExecutedContext.Response.Content.ReadAsAsync<AjaxResCode>().Result;
                    if (result.Data!=null&&!string.IsNullOrWhiteSpace(result.Data.ToString()))
                    {
                        string data= Newtonsoft.Json.JsonConvert.SerializeObject(result.Data);
                        //数据加密过程
                        result.Data = AesEncrypt.Encrypt(data, "");
                        string res = Newtonsoft.Json.JsonConvert.SerializeObject(result);

                        HttpResponseMessage response = new HttpResponseMessage { Content = new StringContent(res, Encoding.GetEncoding("UTF-8"), "application/json") };
                        actionExecutedContext.Response = response;
                    }
                }
            }
        }
    }