wpf使用livecharts---柱状图顶端标出数值

"{Binding SeriesCollection}" LegendLocation="None" Margin="10,15,15,15">
    
        "{Binding Labels}" FontSize="12" LabelsRotation="0" DisableAnimations="True">
            
                "Hidden" Step="1" StrokeThickness="1.5" StrokeDashArray="0" Stroke="#404F56" >
                
            
        
    
    
        
            
                "Hidden" StrokeThickness="1" StrokeDashArray="3" Step="{Binding AxisStep}"  Stroke="#404F56" >
                
            
        
    

Labels = new string[] { "09-01", "09-02", "09-03", "09-04", "09-05", "09-06", "09-07", "09-08", "09-09", "09-10" };

ColumnSeries seriesPowerSave = new ColumnSeries();
seriesPowerSave.Title = "数据1";
seriesPowerSave.Fill = new SolidColorBrush(Color.FromRgb(34, 139, 34));
seriesPowerSave.DataLabels = true;
seriesPowerSave.Foreground = new SolidColorBrush(Color.FromRgb(255, 255, 255));
//显示文本内容
seriesPowerSave.LabelPoint = p => p.Y.ToString();
seriesPowerSave.Values = new ChartValues
{            
    new ObservablePoint(0, 12),
    new ObservablePoint(1, 14),
    new ObservablePoint(2, 28),
    new ObservablePoint(3, 62),
    new ObservablePoint(4, 29),
    new ObservablePoint(5, 29),
    new ObservablePoint(6, 7),
    new ObservablePoint(7, 31),
    new ObservablePoint(8, 13),
    new ObservablePoint(9, 11)
};

//柱子宽度
seriesPowerSave.Width = 20;
seriesPowerSave.MaxColumnWidth = 20;

SeriesCollection = new SeriesCollection { };
SeriesCollection.Add(seriesPowerSave);

//todo ...
//以此类推