.net - MSChart - Auto Zoom Y Axis on X Axis Zoom

Question

I'm using MSChart and I want to enable zoom on the X Axis and once this is zoomed I want the Y Axis to auto zoom into a range appropriate for the data viewable.

Any assistance with the problem would be greatly appreciated!

Thanks

Answer 1

I was searching for a solution for a long time. I found this useful. Subscribe to AxisValueChanged event and use ScaleView to modify the view.

private void chart1_AxisViewChanged(object sender, ViewEventArgs e)
    {
        if (e.Axis.AxisName == AxisName.X)
        {
            int start = (int)e.Axis.ScaleView.ViewMinimum;
            int end = (int)e.Axis.ScaleView.ViewMaximum;

            double[] temp = chart1.Series[0].Points.Where((x, i) => i >= start && i <= end).Select(x => x.YValues[0]).ToArray();
            double ymin = temp.Min();
            double ymax = temp.Max();

            chart1.ChartAreas[0].AxisY.ScaleView.Position = ymin;
            chart1.ChartAreas[0].AxisY.ScaleView.Size = ymax - ymin;
        }
    }