C# 如何通过添加缩放按钮控制Windows窗体图表的放大和缩小

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

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

放大按钮：

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

缩小：

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;
}