CODEWITHSUNDEEP
c#xamluwp
user12601909
user12601909

Reputation:

C# UWP - Adding object to ObservableCollection causes XAML generated UnhandledException

I have an ObservableCollection<DiscoveredScooter> DiscoveredScooters = new ObservableCollection<DiscoveredScooter>. The DiscoveredScooter class looks like this:

public class DiscoveredScooter : ViewModel
{
    public string Id { get; set; }
    public string Name { get; set; }
    public string Model { get; set; }

    public int RSSI { get; set; }

    public DiscoveredScooter(string id, string name, string model, int rssi)
    {
        Id = id;
        Name = name;
        Model = model;
        RSSI = rssi;
    }

    public void Update(DeviceInformationUpdate d, string model, int rssi)
    {
        Id = d.Id;
        RSSI = rssi;
        Model = model;
        RaisePropertyChanged(nameof(Id));
        RaisePropertyChanged(nameof(RSSI));
        RaisePropertyChanged(nameof(Model));
    }

    public void UpdateRSSI(int rssi)
    {
        RSSI = rssi;
        RaisePropertyChanged(nameof(RSSI));
    }
}

My XAML has a Listview which is bound to this ObservableCollection. I have a BluetoothAdvertismentEvent that gets fired whenever I receive advertisement data. I do some validation and then I do

 await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () => {
                                DiscoveredScooters.Add(new DiscoveredScooter(args.BluetoothAddress.ToString(), bleDeviceName, beaconParser.HumanReadableModel, (int)args.RawSignalStrengthInDBm));
                            });

But this causes a "XAML generated UnhandledException" and it doesn't say any more about the error whatsoever. Here is a screenshot https://gyazo.com/42ee2cae9018c05087335f77db83cb99 Any help is appreciated.

Upvotes: 0

Views: 58

Answers (1)

user12601909
user12601909

Reputation:

The issue was that I was using .Substring(41) on a property, where the length was way less than that.

Upvotes: 1

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