"firebase database xaamarin forms trigger" Code Answer's
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firebase database xaamarin forms trigger
public class FirebaseHelper
{
public ObservableCollection<ViewProgramModel> _returnedEvents { get; set; }
public FirebaseHelper()
{
_returnedEvents = new ObservableCollection<ViewProgramModel>();
}
// internal ViewProgramModel MyViewProgramModel { get; set; }
FirebaseClient firebase = new FirebaseClient("https://xxxxxxxxxx.firebaseio.com/");
private readonly string ChildProgram = "ControllerData/xxxxxx_Pirate_1/Program";
public static IDisposable returnedEvents;
public async Task AddViewProgramModel()
{
//new ViewProgramModel() { MODE="test", TARGET=122, TRIGGER="122", TRIGGERVALUE=333, }
await firebase
.Child(ChildProgram)
.PostAsync( new ViewProgramModel() { MODE = "test", TARGET = 122, TRIGGER = "122", TRIGGERVALUE = 333, });
GetAllData();
}
public async Task UpdateViewProgramModel(ViewProgramModel viewProgramModel , string oldValue)
{
var toUpdatePerson = (await firebase
.Child(ChildProgram)
.OnceAsync<ViewProgramModel>()).FirstOrDefault(a => a.Object.TARGET == Convert.ToInt32( oldValue));
await firebase
.Child(ChildProgram)
.Child(toUpdatePerson.Key)
.PutAsync(viewProgramModel);
GetAllData();
}
public async Task DeleteViewProgramModel(string mode)
{
var toDeletePerson = (await firebase
.Child(ChildProgram)
.OnceAsync<ViewProgramModel>()).FirstOrDefault(a => a.Object.MODE == mode);
await firebase.Child(ChildProgram).Child(toDeletePerson.Key).DeleteAsync();
GetAllData();
}
public async void GetAllData()
{
_returnedEvents.Clear();
var programs = await firebase.Child(ChildProgram).OnceAsync<ViewProgramModel>();
for (int i = 0; i < programs.Count; i++)
{
_returnedEvents.Add(programs.ElementAt(i).Object);
}
}
public async void listenForEvents()
{
_returnedEvents.Clear();
var programs = await firebase.Child(ChildProgram).OnceAsync<ViewProgramModel>();
for (int i = 0; i < programs.Count; i++)
{
_returnedEvents.Add(programs.ElementAt(i).Object);
}
//returnedEvents = firebase.Child(ChildProgram).OrderByKey().AsObservable<ViewProgramModel>()
// .Subscribe(eventReceived =>
// {
// if (eventReceived.EventType == Firebase.Database.Streaming.FirebaseEventType.InsertOrUpdate)
// {
// var found = _returnedEvents.FirstOrDefault(i => i._KEY == eventReceived.Key);
// if (found == null)
// {
// // not in observable collection, add it
// _returnedEvents.Add(eventReceived.Object);
// }
// else
// {
// // event was updated
// int tempIndex = _returnedEvents.IndexOf(found);
// _returnedEvents[tempIndex] = eventReceived.Object;
// }
// }
//});
}
}
}
Source: stackoverflow.com
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