[英]How to control Zoom In and Zoom Out in Windows form Chart by adding Zoom buttons
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();
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;
}
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