插入图表

利用ChartBuilder，我们可以很轻松地在专业报表中插入图表：

示例

Dim doc As New PrintDoc
Dim rt As New prt.RenderTable
Dim cmd As New SQLCommand '定义一个SQL命令
Dim dt As DataTable '定义一个数据表变量
Dim Count As Integer = 0
'生成临时表
cmd.CommandText = "Select 产品,Sum(数量) As 数量,Sum(数量 * 单价 * (1 - 折扣)) As 金额 From {订单} Group By 产品"
dt = cmd.ExecuteReader() '生成一个临时表
'生成图表
Dim Chart As New ChartBuilder '定义一个图表变量
Dim Series As WinForm.ChartSeries '定义一个图系变量
Chart.VisualEffect = True '加上这一行,让你的图表更漂亮
Chart.ChartType = ChartTypeEnum.Bar '图表1类型该为Bar(条形)
Chart.ChartType2 = ChartTypeEnum.XYPlot '图表2类型该为线形
Chart.DataTable = dt '设置绑定表
Chart.SeriesList.Clear() '清除图表原来的图系
Series = Chart.SeriesList.Add() '增加一个图系
Series.Text = "数量"
Series.X.DataField = "产品" 'X轴绑定到月份列
Series.Y.DataField = "数量" 'Y轴绑定到数量列
Series = Chart.SeriesList2.Add() '给图表2增加一个图系
Series.Text = "金额"
Series.X.DataField = "产品" 'X轴绑定到月份列
Series.Y.DataField = "金额" 'Y轴绑定到数量列
Chart.LegendVisible = True '显示图列
Chart.LegendCompass= CompassEnum.South '图列显示在南方(底端)
Chart.AxisY.Text = "数量"
Chart.AxisY2.Text = "金额"
Chart.PrintWidth = 150 '图表宽度为150毫米
Chart.PrintHeight = 100 '图标高度为100毫米
'打印表
For Each Col As DataCol In Dt.DataCols
    rt.Cells(0,Count).Text = Col.Name
    For r As integer = 0 To dt.DataRows.Count - 1
        rt.Cells(r +1,Count).Text = dt.DataRows(r)(Col.Name)
    Next
    Count = Count + 1
Next
rt.Style.Gridlines.All = New prt.Linedef(Color.Gray) '灰色网格线
rt.CellStyle.Spacing.All = 1 '内容距离网格线1毫米
rt.Rows(0).Style.TextAlignHorz = prt.AlignHorzEnum.Center '第一行内容水平居中
doc.Body.Children.Add(rt)
'打印图表
Dim rm As New prt.RenderImage
rm.Width = 150 '设置尺寸，这个尺寸最好和图表尺寸一致，以免打印出来的图表变形。
rm.Height = 100
rm.Image = Chart.Image()
rm.Style.ImageAlign.StretchHorz = False '禁止拉伸
rm.Style.ImageAlign.StretchVert = False
rm.Style.Spacing.Top = 3
doc.Body.Children.Add(rm) '将图片对象加入报表
doc.Preview()

执行结果：