Xamarin Microcharts and when should I create the Chart instance?

I have been trying to integrate Microcharts within my Xamarin project. As I wanted them to exist within a listview, I added them to a Model-View-Class and instantiated the BarChart class right there:

public class ChangeOverview


Chart _SuccessChart = null;
public Chart SuccessChart get;
List<Entry> _entries = new List<Entry>()

new Entry(200)

Label = "January",
ValueLabel = "200",
Color = SKColor.Parse("#FF0033")
,
new Entry(300)

Label = "February",
ValueLabel = "300",
Color = SKColor.Parse("#FF0000")
,
new Entry(400)

Label = "March",
ValueLabel = "400",
Color = SKColor.Parse("#AA0000")
,
;
public List<Entry> ChartEntries

get

return _entries;


public ChangeOverview(Change c)

_SuccessChart = new BarChart()

Entries = _entries
;




So in my ContentPage.xaml.cs, I did the following:

public ChangeList ()

InitializeComponent ();
Debug.WriteLine("### Changes: " + User.LoggedUser.AllMyChanges.Count);


foreach (Change c in User.LoggedUser.AllMyChanges)

list.Add(new ChangeOverview(c));


TestChart.Chart = list[0].SuccessChart;



This should have been pretty straight forward, however this did not show me a chart. As I searched around, I found out that I should put the code within my OnAppearing method:

protected override void OnAppearing()

base.OnAppearing();
TestChart.Chart = list[0].SuccessChart;
TestChart.Chart = new BarChart() Entries = list[0].ChartEntries ;




Just assigning the chart doesn't help me, I really have to instantiate the BarChart() within this method.

Is there another way? Can I just somehow refresh the chart? Or do I really have to instantiate the Chart here in the OnAppearing method?

Thanks in advance!

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