UWP StackedLineSeries doesn't show values

Question

I am trying to use WinRTXamlToolkit.Controls.DataVisualization.UWP

trying to draw any of the stacked charts like this:

But only this comes out:

Answer 1

Since I don't know how you define the code behind, I just provide the sample code as follows which can create a StackedLineSeries chart successfully.

XAML Code

<Page
x:Class="CStackLineChat.MainPage"
...
xmlns:charting="using:WinRTXamlToolkit.Controls.DataVisualization.Charting" 
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Padding="50"  > 
    <charting:Chart x:Name="MyChart" Title="Stacked column Chart">
        <charting:StackedLineSeries>
            <charting:StackedLineSeries.SeriesDefinitions>
                <charting:SeriesDefinition                       
                    DependentValuePath="Amount"   
                    IndependentValuePath="Name"
                    IsTapEnabled="True"
                    Title="Doodad"    />
                <charting:SeriesDefinition
                    Title="Stan2"                      
                    DependentValuePath="Amount"
                    IndependentValuePath="Name"/>
            </charting:StackedLineSeries.SeriesDefinitions>
        </charting:StackedLineSeries> 
    </charting:Chart> 
</Grid>
</Page>

Code behind

public sealed partial class MainPage : Page
{
    private Random _random = new Random();
    List<NameValueItem> Records = new List<NameValueItem>();
    List<NameValueItem> Records2 = new List<NameValueItem>();
    public MainPage()
    {
        this.InitializeComponent(); 
        for (int i = 0; i < 5; i++)
        {
            Records.Add(new NameValueItem { Name = "Name" + i, Amount = _random.Next(10, 100) });
            Records2.Add(new NameValueItem { Name = "Name" + i, Amount = _random.Next(10, 100) });
        }
        this.RunIfSelected(this.MyChart, () => ((StackedLineSeries)this.MyChart.Series[0]).SeriesDefinitions[0].ItemsSource = Records);
        this.RunIfSelected(this.MyChart, () => ((StackedLineSeries)this.MyChart.Series[0]).SeriesDefinitions[1].ItemsSource = Records2); 
    }
    private void RunIfSelected(UIElement element, Action action)
    {
        action.Invoke();
    } 
}

public class NameValueItem
{
    public string Name { get; set; }
    public int Amount { get; set; }
}

And the result

Additionally, by testing on my side, it seems like DependentValuePath and IndependentValuePath properties can not directly binding in your scenario. The best way to use this package is to follow the official sample. Here is the chart sample.