Unable to populate my CollectionView with sqlite xamarin.forms? - sqlite

Question

I am trying to follow this tutorial to plug my sqlite database : https://learn.microsoft.com/en-us/xamarin/get-started/quickstarts/database?pivots=windows
On step 9 they say to do :
protected override async void OnAppearing()
{
base.OnAppearing();
listView.ItemsSource = await App.Database.GetNotesAsync();
}
In my XAML i have a CollectionView and not a list view so i tried : CollectionView.ItemsSource but i get the following error : An object reference is required for the nonstatic field, method, or property 'ItemsView.ItemsSource'
Heres my .xaml code ( note that i have a pancakeview inside which is a plugin, maybe that could have a link but i am not sure : https://github.com/devcrux/Xamarin.Forms-Expander
The .XAML code :
<TabbedPage xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:local="clr-namespace:Calculette"
xmlns:pv="clr-namespace:Xamarin.Forms.PancakeView;assembly=Xamarin.Forms.PancakeView"
x:Class="Calculette.MainPage"
BarBackgroundColor = "White"
BarTextColor="#008A00">
<ContentPage Icon="icontache.png" BackgroundColor="#F6F8F9">
<ContentPage.Content>
<!-- ScrollView nous permet d'avoir une page scrollable-->
<ScrollView Orientation="Vertical">
<CollectionView Grid.Row="2" Margin="25" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand"
SelectionMode="None" ItemsSource="{Binding MyAgenda}">
<CollectionView.Header>
<StackLayout Orientation="Horizontal" Spacing="220">
<Label Text="Agenda" TextColor="Black" FontSize="18"/>
<ImageButton Source="iconplus.png" HeightRequest="30" WidthRequest="30" Clicked="GoToNewFormPage"></ImageButton>
</StackLayout>
</CollectionView.Header>
<CollectionView.ItemsLayout>
<LinearItemsLayout Orientation="Vertical" ItemSpacing="20"/>
</CollectionView.ItemsLayout>
<CollectionView.ItemTemplate >
<DataTemplate>
<pv:PancakeView HasShadow="True" BackgroundColor="White" VerticalOptions="StartAndExpand "
HorizontalOptions="FillAndExpand" >
<Grid VerticalOptions="StartAndExpand" HorizontalOptions="FillAndExpand">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<BoxView BackgroundColor="{Binding Color}" WidthRequest="3" HorizontalOptions="Start"
VerticalOptions="FillAndExpand"/>
<Expander Grid.Column="1">
<Expander.Header>
<Grid HorizontalOptions="FillAndExpand">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="3.5*"/>
</Grid.ColumnDefinitions>
<StackLayout HorizontalOptions="Center" VerticalOptions="Center">
<Label Text="{Binding Date, StringFormat='{0:dd}'}" TextColor="#008A00" FontSize="27"
HorizontalOptions="Center"/>
<Label Text="{Binding Date, StringFormat='{0:MMMM}'}" TextColor="Black" FontSize="10"
HorizontalOptions="Center" Margin="0,-10,0,0" FontAttributes="Bold"/>
<ImageButton Source="iconplus.png" HorizontalOptions="Center" HeightRequest="30" WidthRequest="30" Clicked="GoToFormPage"></ImageButton>
</StackLayout>
<BoxView Grid.Column="1" BackgroundColor="#F2F4F8" WidthRequest="1" HorizontalOptions="Start"
VerticalOptions="FillAndExpand"/>
<StackLayout Grid.Column="2" HorizontalOptions="Start" VerticalOptions="Center" Margin="20">
<Label Text="{Binding Topic}" TextColor="#008A00" FontSize="15" FontAttributes="Bold"/>
<Label Text="{Binding Duration}" TextColor="#2F3246" FontSize="12" Margin="0,-10,0,0"/>
</StackLayout>
</Grid>
</Expander.Header>
<Grid HorizontalOptions="FillAndExpand">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="3.5*"/>
</Grid.ColumnDefinitions>
<BoxView Grid.Column="1" BackgroundColor="#F2F4F8" WidthRequest="1" HorizontalOptions="Start"
VerticalOptions="FillAndExpand"/>
<StackLayout Grid.Column="2" Spacing="10">
<Label Text="Tâches" TextColor="Black" FontSize="15" Margin="20,0"/>
<StackLayout BindableLayout.ItemsSource="{Binding Speakers}" HorizontalOptions="Start" VerticalOptions="Center" Margin="20,0,0,20">
<BindableLayout.ItemTemplate>
<DataTemplate>
<Label TextColor="#2F3246" FontSize="12">
<Label.FormattedText>
<FormattedString>
<FormattedString.Spans>
<Span Text="{Binding Time}"/>
<Span Text=" - "/>
<Span Text="{Binding Name}" FontAttributes="Bold"/>
</FormattedString.Spans>
</FormattedString>
</Label.FormattedText>
</Label>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
</StackLayout>
</Grid>
</Expander>
</Grid>
</pv:PancakeView>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</ScrollView>
</ContentPage.Content>
</ContentPage>
Thanks !