此主题相关图片如下：111.png
Dim dt As DataTable
Dim b As New GroupTableBuilder("统计表1",DataTables("供应商订货总表"))
b.Groups.AddDef("供应商名称","供应商名称")
b.Groups.AddDef("日期",DateGroupEnum.Year,"年")
b.Groups.AddDef("日期",DateGroupEnum.Month,"月")
b.Totals.AddDef("供应商名称",AggregateEnum.Count,"订单数") '根据客户列来统计记录数,也就是订单数
dt = b.Build(True) '参数设置为False,生成一个临时表,不在主界面显示
Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")
trv.BuildTree(dt, "供应商名称|年|月")
trv.StopRedraw
For Each nd As WinForm.TreeNode In trv.AllNodes
Dim Year As Integer = nd.DataRow("年")
Dim Month As Integer = nd.DataRow("月")
Dim Product As String = nd.DataRow("供应商名称")
Select Case nd.Level
Case 0
nd.Text = nd.text & "供应商名称(" & dt.Compute("Sum(订单数)","供应商名称 = " & Product) & "条)"
Case 1
nd.Text = nd.text & "年(" & dt.Compute("Sum(订单数)","年 = " & Year & " And 供应商名称 = " & Product) & "条)"
Case 2
nd.Text = nd.text & "年(" & dt.Compute("Sum(订单数)","年 = " & Year & " And 供应商名称 = " & Product) & "条)"
End Select
Next
trv.Nodes.Insert("显示所有行","显示所有行(" & dt.Compute("Sum(订单数)") & "条)",0)
trv.ResumeRedraw
老师，帮我看一下case里面的语句，我想生成 供应商名称（条），年（条），月（条）条数的目录树，参照的帮助里的例子，写不对，请看一下哪块错了
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Post By：2018/11/6 8:40:00 [只看该作者]
