主题：[求助]打印输出为何没有分组打印选项呢

分组打印

打印客户表，按地区分组打印，代码如下：

Dim doc As New PrintDoc
Dim rt As Prt.RenderTable
Dim rx As prt.RenderText
Dim tbl As Table = Tables("客户")
Dim Rows As List(Of DataRow)
Dim Regions As List(Of String) = tbl.DataTable.GetUniqueValues("","地区")
doc.Pagesetting.LandScape = True
For Each Region As String In Regions
rx = New prt.RenderText
rx.Style.FontSize = 14
rx.Style.FontBold = True
rx.Style.Spacing.Bottom = 2
rx.Text = "地区: " & Region
doc.Body.Children.Add(rx)
rt = New prt.RenderTable
rt.Style.Font = Tables("客户").Font
rt.Style.TextAlignVert = prt.AlignVertEnum.Center
rt.Style.GridLines.All = New prt.LineDef(0.3,Color.LightGray)
rt.Style.Spacing.Bottom = 5
rt.CellStyle.Spacing.All = 1
rt.Style.Font = tbl.Font
Rows = tbl.Datatable.Select("[地区] = '" & Region & "'")
For c As integer = 0 To tbl.Cols.Count - 1
rt.Cells(0,c).Text = tbl.Cols(c).Name
rt.Cols(c).Width = tbl.Cols(c).PrintWidth
For r As integer = 0 To Rows.Count -1
rt.Cells(r + 1, c).Text = rows(r)(tbl.Cols(c).Name)
Next
Next
rt.RowGroups(0,1).Header = prt.TableHeaderEnum.All
doc.Body.Children.Add(rt)
Next
doc.preview()