How to control Zoom In and Zoom Out in Windows form Chart by adding Zoom buttons

Question

如何通过添加ZoomIn和ZoomOut按钮控制Windows窗体图表中的放大和缩小

chart1.ChartAreas["draw"].AxisY.ScaleView.ZoomReset();

Answer 1

Zoom-in button:

Axis ax = chart1.ChartAreas[0].AxisX;
ax.ScaleView.Size = double.IsNaN(ax.ScaleView.Size)?   
                    (ax.Maximum - ax.Minimum) / 2 : ax.ScaleView.Size /= 2;

Zoom-out:

Axis ax = chart1.ChartAreas[0].AxisX;
ax.ScaleView.Size = double.IsNaN(ax.ScaleView.Size)?   
                    ax.Maximum : ax.ScaleView.Size *= 2;
if (ax.ScaleView.Size > ax.Maximum - ax.Minimum)
{
    ax.ScaleView.Size = ax.Maximum;
    ax.ScaleView.Position = 0;
}