Binding Xamarin XAML to code behind properties (ListView) - xamarin

Question

I want to bind my code-behind property, which is a list, to a XAML ListView. However, my ListView is never populated and I have no idea why.
<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
x:Class="BLEPl.EvaluationPage"
Title="Evaluation">
<ContentPage.Content>
<StackLayout Padding="0,20,0,20">
<ListView HasUnevenRows="True" IsVisible="True" x:Name="TableLayout" ItemsSource="{Binding Path=SensorValues}">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Grid>
<Label Style="{StaticResource TitleLabel}" Grid.Column="0" Grid.Row="0" Text="Zeitstempel: " />
<Label Style="{StaticResource DataLabel}" Grid.Column="1" Grid.Row="0" Text="{Binding TimeStamp}" />
<Label Style="{StaticResource TitleLabel}" Grid.Column="0" Grid.Row="1" Text="Wert: " />
<Label Style="{StaticResource DataLabel}" Grid.Column="1" Grid.Row="1" Text="{Binding Value}" />
<Label Style="{StaticResource TitleLabel}" Grid.Column="0" Grid.Row="2" Text="Sensor: " />
<Label Style="{StaticResource DataLabel}" Grid.Column="1" Grid.Row="2" Text="{Binding Sensor.Name}" />
</Grid>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
</ContentPage.Content>
</ContentPage>
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class EvaluationPage : ContentPage
{
private ObservableCollection<SensorValue> SensorValues = new ObservableCollection<SensorValue>();
public EvaluationPage ()
{
InitializeComponent ();
using (var context = new BlepContext(true))
{
var repo = new BLEPRepository(context);
SensorValues = new ObservableCollection<SensorValue>(repo.GetAllSensorValues());
}
}
}
When I run this, my ListView doesn't contain any items. I do not get errors and my app compiles fine. Am I doing something wrong here?

Answer 1

<ListView HasUnevenRows="True" IsVisible="True" x:Name="TableLayout" ItemsSource="{Binding SensorValues}">
you can only bind to public properties, and you need to set a BindingContext for the page
// needs to be a PUBLIC PROPERTY
public ObservableCollection<SensorValue> SensorValues { get; set; }
public EvaluationPage ()
{
InitializeComponent ();
// set the BindingContext
this.BindingContext = this;
using (var context = new BlepContext(true))
{
var repo = new BLEPRepository(context);
SensorValues = new ObservableCollection<SensorValue>(repo.GetAllSensorValues());
}
}