格式设置，自己想写什么样都可以。

public class LJsonResult : JsonResult
{
    public int StatusCode { get; }
    public LJsonResult(dynamic result, int statusCode=200, JsonRequestBehavior jsonRequestBehavior= JsonRequestBehavior.AllowGet)
    {
        StatusCode = statusCode;
        Data = result;
        JsonRequestBehavior = jsonRequestBehavior;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        if (context == null)throw new ArgumentNullException("Context is null.");
        if ((JsonRequestBehavior == JsonRequestBehavior.DenyGet) && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("JsonRequest_GetNotAllowed");
        var response = context.HttpContext.Response;
        response.ContentType = !string.IsNullOrEmpty(this.ContentType) ? this.ContentType : "application/json";
        if (ContentEncoding != null)response.ContentEncoding = this.ContentEncoding;
        if (Data != null)response.Write(JsonConvert.SerializeObject(Data, new JsonSerializerSettings { DateFormatString = "yyyy/MM/dd HH:mm:ss" }));
        response.StatusCode = StatusCode;
    }
}

用js转一下就要以了

配置一下就行了..这个东西是可以配置的.默认序列化方式.