Question

I am making a plot which has both primary and secondary y axis but on zooming the chartarea only primary x axis and primary y axis are zooming and the scrollbar doesn t appear on the secondary Y Axis

        chrtarea.CursorX.IsUserEnabled = true;
        chrtarea.CursorX.IsUserSelectionEnabled = true;
        chrtarea.CursorY.IsUserEnabled = true;
        chrtarea.CursorY.IsUserSelectionEnabled = true;

        chrtarea.AxisX.ScaleView.Zoomable = true;
        chrtarea.AxisY.ScaleView.Zoomable = true;
        chrtarea.AxisY2.ScaleView.Zoomable = true;

守则有问题。请说明如何做到这一点。

Answer 1

我认识到这个问题是老的,但今天我反对这个问题。

我能实现一个可聚居的亚轴线的唯一途径是在轴心认为变化时改变Y轴线的大小和min:

private void ChartMainAxisViewChanged(object sender, ViewEventArgs e)
{
    chartMain.ChartAreas[0].AxisY2.ScaleView.Position = chartMain.ChartAreas[0].AxisY.ScaleView.Position / 10.0;
    chartMain.ChartAreas[0].AxisY2.Minimum = chartMain.ChartAreas[0].AxisY.ScaleView.ViewMinimum / 10.0;
    chartMain.ChartAreas[0].AxisY2.Maximum = chartMain.ChartAreas[0].AxisY.ScaleView.ViewMaximum / 10.0;
    chartMain.ChartAreas[0].AxisY2.Interval = chartMain.ChartAreas[0].AxisY.Interval / 10.0;
    chartMain.ChartAreas[0].AxisY2.IntervalOffset = chartMain.ChartAreas[0].AxisY.IntervalOffset / 10.0;
}

这取决于Y轴和Y2轴之间的比例。地雷有时是10:1,因此很容易转化,但如果你有活力,则需要计算这一比率。

最后两条路线也调整了间隔,但如果你不希望间隔一致,你就不必这样做。

Answer 2

我认识到这个问题是老的,但今天我反对这个问题。

您可以将CursorY转而与二级轴线合作(AxisY2):

    chartarea.CursorY.AxisType = System.Windows.Forms.DataVisualization.Charting.AxisType.Secondary;

This will disable zooming on primary Y axis so if you wish to have zooming on both, stick to Erresen s answer

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