将垂直线添加到 LiveCharts.WinForms.CartesianChart

Question

下面是我的 LiveChart.WinForms.CartesianChart，我想知道如何在下面的图表中添加一条垂直线 - 例如，我想在 8 月 21 日的点添加一条黑色垂直线（带有工具提示）并且想知道我该怎么做？

这是我正在使用的代码：

        cartesianChart1.AxisX.Add(new Axis
        {
            Labels = myDateLabels,
            Separator = new LiveCharts.Wpf.Separator { Step = 1 },
            LabelsRotation = 270
        });

        cartesianChart1.AxisY.Add(new Axis
        {
        });
        cartesianChart1.LegendLocation = LegendLocation.Bottom;

        var axisSection = new AxisSection
        {
            Stroke = System.Windows.Media.Brushes.Black,
            StrokeThickness = 1,
            Value = 2
        };

        cartesianChart1.AxisX.Add(new Axis
        {
            Sections = new SectionsCollection
            {
                axisSection
            }
        });

        SeriesCollection series = new SeriesCollection();

        series.Add(new LineSeries { Title = "Sign Ups", Values = signUpsValues, Stroke = System.Windows.Media.Brushes.Blue, Fill = System.Windows.Media.Brushes.Transparent });

        cartesianChart1.Series = series;

Answer 1

你只需要添加如下代码：根据你的情况修改Value的值。

var axisSection = new AxisSection {
    Stroke=Brushes.Black,//colocr
    StrokeThickness=1,
    Value=2,//Modify this.
};

cartesianChart1.AxisX.Add(new Axis {
            Sections=new SectionsCollection
         {
             axisSection         
        }
});

输出：

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