主题：如何根据各列数据生成饼形图？

此主题相关图片如下：2011-7-16 10-41-34.png

Dim g As New GroupTableBuilder("分组统计", DataTables("总览"))
g.Groups.AddDef("乡名")
g.Totals.AddDef("退耕地")

g.Totals.AddDef("平坡退耕","平坡")
g.Totals.AddDef("退耕斜坡","缓坡")
g.Totals.AddDef("斜坡退耕","斜坡")

g.Totals.AddDef("陡坡退耕","陡坡")
g.Build()

Dim Chart As WinForm.Chart '定义一个图表变量
Dim Series As WinForm.ChartSeries '定义一个图系变量
Dim t As Table = Tables("分组统计") '定义一个变量t引用数据表
Chart= Forms("构成分析").Controls("Chart1") ' 引用窗口中的图表
Chart.SeriesList.Clear() '清除图表原来的图系
Chart.VisualEffect = True '加上这一行,让你的图表更漂亮
Chart.ChartType = ChartTypeEnum.Pie '图表1类型改为Bar(条形)

Dim nms() As String = {"平坡","缓坡","斜坡","陡坡"}
For Each nm  As String In nms
    Series = Chart.SeriesList.Add() '增加一个图系
    Series.Length = 1 '一个系列只能包括一个值
    Series.Text = nm
    Series.Y(0) = Tables("分组统计").Current(nm)
    Series.DataLabelText = "{#YVAL}" & "亩" 

    Series.DataLabelForeColor = Color.Red

Next
Chart.LegendVisible = True '显示图列
Chart.LegendCompass= CompassEnum.East '图列显示在东方(右方)

希望显示：253.6亩占32.51%

根据各列数据生成饼形图（3楼）不知怎么变通成下面效果

Series.DataLabelText =" {#YVAL}" & "亩" & "占" &  Math.Round(r("设计面积")*100/sm,2) & "%"

此主题相关图片如下：2011-7-17 16-58-10.png

谢谢!成功了

.........

 Series.Text = nm
    Dim r As Row = Tables("分组统计").Current
    Dim sm As Double=r("平坡")+r("缓坡")+r("斜坡")+r("陡坡")
    Series.Y(0) = r(nm)
    Series.DataLabelText =" {#YVAL}" & "亩 占" &  Math.Round(r(nm)*100/sm,2) & "%"
    Series.DataLabelForeColor = Color.Red 'White '白字
    Chart.HeaderText="" & cmb.Value & "退耕地坡度级分布"
...........