.net5 WebAPI 参数验证 ModelValid

利用InvalidModelStateResponseFactory
官网推荐做法 覆盖ModelState管理的默认行为,只有在数据验证失败时才会执行

services.Configure<ApiBehaviorOptions>(options =>
{
  options.InvalidModelStateResponseFactory = (context) =>
  {
      //参数验证
            services.Configure<ApiBehaviorOptions>(options =>
            {
                //只有在数据验证失败时才会执行
                options.InvalidModelStateResponseFactory = (context) =>
                {
                    var errors = context.ModelState.Select(f => new KeyValuePair<string, IEnumerable<string>>(f.Key, f.Value.Errors.Select(e => e.ErrorMessage)));

                    return new JsonResult(new APIResponseModel<object> { Code = ResponseEnum.FAIL.GetHashCode(), Message = JsonConvert.SerializeObject(errors), Data = errors });
                };
            });  

  };
});

自定义验证

public class NoSpaceAttribute : ValidationAttribute
    {
        public override bool IsValid(object value)
        {
            if (value is string str)
            {
                return !str.Contains(' ');
            }
            return false;
        }
    }

参考