主题：圆饼图表生成

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

Chart=e.form.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 nms1() As String = {"经营汇总","支出汇总","负载汇总"}

Dim nms2() As String = {"变动金额","支出金额","欠款金额"}

Dim nms3() As String = {"经营日期","支持日期","欠款日期"}

Dim nms4() As String = {"经营项目","支出项目","欠款名称"}

Dim cls() = {Color.red, Color.blue}

For i As Integer = 0 To nms1.Length - 1

    Dim d As Date = new Date(Date.Today.Year, Date.Today.Month, 1)

    For Each s As String In DataTables(nms1(i)).GetValues(nms4(i), nms4(i) & " Is not null And " & nms3(i) & " >= #" & d & "# and " & nms3(i) & " < #" & d.AddMonths(1) & "#")

        Dim sum As Double = DataTables(nms1(i)).compute("sum(" & nms2(i) & ")", nms4(i) & "='" & s & "' and " & nms3(i) & " >= #" & d & "# and " & nms3(i) & " < #" & d.AddMonths(1) & "#")

        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 = s & "(" & sum & ")" '设置图系的标题

        Series.Y(0) = sum

        Series.TooltipText = s & " : {#YVAL}" '显示数据

        Series.DataLabelText = sum

        Series.FillColor = cls(i)

    Next

Next

Chart.LegendVisible = True '显示图列