Y 轴在折线图上的最大值处

Question

我有一个带有十字线的折线图，我想知道 y 轴十字线（水平）是否可能只沿着折线图的最大值移动。如果我的描述没有解决我的问题，希望这些图片能有所帮助？

图片 1 图 2

我想知道是否可以显示这个，因为目前我需要将鼠标移动到 40 到 60 之间的点来实现这个外观，是否可以在无需调整的情况下获得这个结果我自己十字准线？

Xaml

    <Grid>
    <Grid.DataContext>
        <local:ViewModel/>
    </Grid.DataContext>

    <syncfusion:SfChart Margin="10">

        <syncfusion:SfChart.PrimaryAxis>
            <syncfusion:CategoryAxis />
        </syncfusion:SfChart.PrimaryAxis>

        <syncfusion:SfChart.SecondaryAxis>
            <syncfusion:NumericalAxis Maximum="80" Minimum="0"/>
        </syncfusion:SfChart.SecondaryAxis>

        <syncfusion:SfChart.Behaviors>
            <local:CustomCrossHairBehavior />
        </syncfusion:SfChart.Behaviors>

        <syncfusion:LineSeries x:Name="series" 
                               ItemsSource="{Binding DataPoint}"
                               XBindingPath="XData"
                               YBindingPath="YData"/>           
    </syncfusion:SfChart>
</Grid>

编辑 C#

 public class Model
{
    public string XData
    {
        get;
        set;
    }
    public double YData
    {
        get;
        set;
    }

}

public class ViewModel
{
    public ObservableCollection<Model> DataPoint
    {
        get;
        set;
    }
    public ViewModel()
    {
        this.DataPoint = new ObservableCollection<Model>();
        var date = new DateTime(2000, 1, 1);
        DataPoint.Add(new Model { XData = "Jan", YData = 40});
        DataPoint.Add(new Model { XData = "Feb", YData = 60});
        DataPoint.Add(new Model { XData = "Mar", YData = 30});
        DataPoint.Add(new Model { XData = "Apr", YData = 20});
        DataPoint.Add(new Model { XData = "May", YData = 60});
        DataPoint.Add(new Model { XData = "June", YData = 50});
        DataPoint.Add(new Model { XData = "July", YData = 10});
        DataPoint.Add(new Model { XData = "August", YData = 40});

    }
}
public class CustomCrossHairBehavior:ChartTrackBallBehavior
{
    public Line newline;
    public CustomCrossHairBehavior()
    {
        newline = new Line();
        Binding binding = new Binding();
        binding.Path = new PropertyPath("LineStyle");
        binding.Source = this;
        newline.SetBinding(Line.StyleProperty, binding);
    }
    protected override void OnMouseMove(MouseEventArgs e)
    {
        var element = e.Source as SfChart;
        var positon = e.GetPosition(this.AdorningCanvas);
        newline.X1 = ChartArea.SeriesClipRect.Left;
        newline.Y1 = positon.Y;
        newline.Y2 = positon.Y;
        newline.X2 = ChartArea.SeriesClipRect.Width + ChartArea.SeriesClipRect.Left;
        AddElement(newline);
        base.OnMouseMove(e);
    }
}

Answer 1

这可能对控件供应商有所帮助....

Vendor Help page

Or this one, Strip Lines, you can adjust style

使用专有控件时，请先向供应商寻求支持和教程。

Y 轴在折线图上的最大值处

Y Axis at max values on line graph

wpf

charts

syncfusion