尝试使用Firebase进行GET orderB时发生C＃WebRequest 400错误，无需orderby即可正常工作

Question

因此，我试图借助WebRequest从Firebase在线数据库中获取对象列表，效果很好，但是当我尝试使用orderyBy =“ Price”＆startAt = 2查询它时，请求将给出我有一个400错误，我不明白为什么。这是代码

private static string url = "https://project-name.firebaseio.com/Services.json?orderBy=\"Price\"&startAt=2"; 



 public static async Task<List<Service>> GetServices()
    {
        List<Service> services = new List<Service>();
        JObject j;
        var request = WebRequest.CreateHttp(url.ToString());
        request.Method = "GET";
        request.ContentType = "application/json";

        using (var response = await request.GetResponseAsync())
        {
            var json = (new StreamReader(response.GetResponseStream()).ReadToEnd());

            dynamic deserialized = JsonConvert.DeserializeObject(json);
            j = (Newtonsoft.Json.Linq.JObject)(deserialized);
            try
            {
                foreach (System.Collections.Generic.KeyValuePair<string, Newtonsoft.Json.Linq.JToken> obj in j)
                {
                    Service s = JsonConvert.DeserializeObject<Service>(obj.Value.ToString());
                    services.Add(s);
                }
                return services;
            }
            catch (NullReferenceException exception)
            {
                return new List<Service>();
            }
        }


    }

请帮助！

Answer 1

我设法解决了该错误，显然我应该做的是编辑Firebase Realtime Databse的规则以使其具有index.On属性。对于遇到此错误的任何人，请注意