ASP.NET Corewebapi返回固定格式的json数据

在正常开发web api时需要返回固定格式的json数据，这样前端处理也方便，具体操作如下：

1.建立自定义过滤器

 public class WebApiResultFilter : ActionFilterAttribute
    {
        public override void OnResultExecuting(ResultExecutingContext context)
        {
            if (context.Result is ObjectResult)
            {
                var result = context.Result as ObjectResult;
                if (result.Value == null)
                {
                    context.Result = new ObjectResult(new { code = 0, msg = "未找到资源", data = "" });
                }
                else
                {
                    context.Result = new ObjectResult(new { code = 1, msg = "ok", data = result.Value });
                }
            }
            else if (context.Result is EmptyResult)
            {
                context.Result = new ObjectResult(new { code = 0, msg = "未找到资源", data = "" });
            }
            else if (context.Result is ContentResult)
            {
                context.Result = new ObjectResult(new { code = 1, msg = "ok", data = (context.Result as ContentResult).Content });
            }
            else if (context.Result is StatusCodeResult)
            {
                context.Result = new ObjectResult(new { code = 1, msg = "ok", data = "" });
            }
        }
    }

2.Startup.cs中注册过滤器

  public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllers(options =>
            {
                options.Filters.Add(typeof(WebApiResultFilter));
            });
        } 

3.实现效果：（这里推荐一个类似postman的测试工具：ApiPost）