Dim Chart As WinForm.Chart
Dim Series As WinForm.ChartSeries
Chart= e.Form.Controls("Chart1")
Chart.DataSource = "质量目标"
Chart.SeriesList.Clear()
Series = Chart.SeriesList.Add()
Series.X.DataField = "年份"
Series.Y.DataField = "合格率"
Series.DataLabelText = "{#YVAL}"
Chart.AxisY.AnnoFormatString = "##.#%"

以上代码生成的图表，曲线坐标上的数据是数字（如：0.8523），如果要将其变开百分率（如：85.23%），应如何编写。