c# - 如何使用 C# 在双 Y 轴 ZedGraph 图中添加实时数据？

Question

对于我的项目，我需要向我的双 y 轴图表添加和更新实时数据。 Y 和 Y2 值共享相同的 X 值，我已经创建了它。现在我有一个函数可以将新的点对添加到曲线列表中。

这是我的问题:我的 Y 和 Y2 值总是添加到第一条曲线的曲线列表中。如何将 Y2 值添加到图表中的第二条曲线列表？

这是我的函数代码:

    private void AddDataToGraph(ZedGraphControl zg1, XDate xValue, double yValue1, double yValue2)
    {
        // Make sure that the curvelist has at least one curve.
        if (zg1.GraphPane.CurveList.Count <= 0)
            return;

        // Get the first CurveItem in the graph.
        LineItem curve = zg1.GraphPane.CurveList[0] as LineItem;

        if (curve == null)
            return;

        // Get the PointPairList.
        IPointListEdit list = curve.Points as IPointListEdit;
        IPointListEdit list2 = curve.Points as IPointListEdit;

        // If this is null, it means the reference at curve.Points does not
        // support IPointListEdit, so we won't be able to modify it.
        if (list == null || list2 == null)
            return;

        // Add new data points to the graph.
        list.Add(xValue, yValue1);
        list2.Add(xValue, yValue2);

        // Force redraw.
        zg1.Invalidate();
    }

如何将 Y2 值添加到第二个曲线列表中？

Answer 1

我自己找到了一个可能的解决方案。这是我的代码更改:

private void AddDataToGraph(ZedGraphControl zg1, XDate xValue, double yValue1, double yValue2)
    {
        // Make sure that the curvelist has at least one curve
        if (zg1.GraphPane.CurveList.Count <= 0)
            return;

        // Get the first CurveItem in the graph
        LineItem curve = zg1.GraphPane.CurveList[0] as LineItem;
        LineItem curve2 = zg1.GraphPane.CurveList[1] as LineItem;

        if (curve == null || curve2 == null)
            return;

        // Get the PointPairList
        IPointListEdit list = curve.Points as IPointListEdit;
        IPointListEdit list2 = curve2.Points as IPointListEdit;
        // If this is null, it means the reference at curve.Points does not
        // support IPointListEdit, so we won't be able to modify it
        if (list == null || list2 == null)
            return;

        // add new data points to the graph
        list.Add(xValue, yValue1);
        list2.Add(xValue, yValue2);

        // force redraw
        zg1.Invalidate();
    }

重要的是使用“CurveList[i]”中的索引。所以 [0] 是我的 Y 值曲线，[1] 是我的 Y2 值曲线，依此类推。

我希望这对遇到相同或类似问题的任何人有所帮助。