Firebase.Database.FirebaseException : Exception occured while processing the request

Question

Unhandled Exception: Firebase.Database.FirebaseException: Exception occured while processing the request. Url: https://mylimo-b2029.firebaseio.com/users/.json Request Data: Response: {"first_name":"dsadas"} occurred

Mainpage.xaml.cs :

 protected async override void OnAppearing()
    {

      base.OnAppearing();
       var allUsers = await firebaseHelper.GetAllUsers();
       lstPersons.ItemsSource = allUsers;
   }

Firebasehelper.cs :

public async Task<List<Users>> GetAllUsers()
    {

        return (await firebase
          .Child("users")

          .OnceAsync<Users>()).Select(item => new Users
          {
              //user_id = item.Object.user_id,
              first_name = item.Object.first_name
          }).ToList();
    }

Answer 1

我遇到了同样的问题，并决定检查是否所有属性都设置了我的本地对象。只是验证属性是否为空，没有解决。

前:

var item = await firebase.Child("users").OnceAsync <Users> ());

然后:

using Newtonsoft.Json.Linq;

var item = await firebase.Child("users").OnceAsync <JObject> ());

问题在于反序列化。您可以通过以下方式访问 JObject 中的属性:

var itemProperty = item.Object.GetValue("<property_name>").