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我正在使用 Oxyplot 中的 AreaSeries 来绘制两点之间的范围，并希望跟踪器在悬停时显示它们。通过为 DataPoints 创建自定义类并相应地更改 TrackerFormat，我实现了使 Tracker 与其他系列一起显示自定义属性。这是一个例子：

    public class CommentPoint : IScatterPointProvider
    {
        public CommentPoint(double x, double y, string text)
        {
            X = x; Y = y; Text = text;
        }
        public double X, Y;
        public string Text { get; set; }
        public ScatterPoint GetScatterPoint()
        {
            return new ScatterPoint(X, Y);
        }
    }

和 TrackerFormat：

Series.TrackerFormatString = "{2}\n{Text}";

但是，这仅在添加新点数组作为系列的 ItemSource 时才有效。使用 Line/ScatterSeries 很容易，因为它们只需要一个点列表。但是 AreaSeries 需要绘制 2 个点。

我尝试将这些自定义点的二维数组添加为 ItemSource：

    public class AreaPoint : IDataPointProvider
    {
        public AreaPoint(double x, double y, double y2)
        {
            X = x; Y1 = y; Y2 = y2;
        }

        public double X { get; set; }
        public double Y1 { get; set; }
        public double Y2 { get; set; }
        public DataPoint GetDataPoint()
        {
            return new DataPoint(X, Y1);
        }
    }

所以基本上：

AreaPoint[,] points = new AreaPoint[2,amount.Count]
AreaPoint[0,i] = new AreaPoint(x,y,y2);
....
Series.ItemSource = points;

这不起作用，我收到一个错误“不是一维数组”。

接下来我尝试通过 GetDataPoint 方法直接添加点：

Series.Points.Add(new AreaPoint(x,y,y2).GetDataPoint());
Series.Points2.Add(new AreaPoint(x2,y2,y3).GetDataPoint());
Series.TrackerFormatString = "{2}\n{4}\n{Y2}";

这适用于 AreaSeries 被正确绘制，但 Tracker 不会显示我的自定义属性。

所以我想我的问题是，如何将自定义 ItemSource 添加到 AreaSeries？

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1 回答 1

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您只需将 X2、Y2 字段添加到您的自定义点类并DataField在AreaSeries.

public class AreaPoint : IDataPointProvider
{
    public AreaPoint(double x, double y, double x2, double y2, string customValue)
    {
        X = x;
        Y = y;
        X2 = x2;
        Y2 = y2;
        CustomValue = customValue;
    }

    public double X { get; set; }
    public double Y { get; set; }
    public double X2 { get; set; }
    public double Y2 { get; set; }
    public string CustomValue { get; set; }
}

...
series = new AreaSeries();
series.DataFieldX = "X";
series.DataFieldY = "Y";
series.DataFieldX2 = "X2";
series.DataFieldY2 = "Y2";
series.TrackerFormatString = "{0}\n{1}: {2}\n{3}: {4}" + 
    "\nMy custom value: {CustomValue}"
于 2020-08-07T10:38:56.170 回答