主题：[求助]生成带统计的筛选树时，月份出现重复

'首先生成统计表

Dim dt As DataTable

Dim b As New GroupTableBuilder("统计表1",DataTables("收文登记"))

b.Groups.AddDef("收到时间",DateGroupEnum.Year,"年")

b.Groups.AddDef("收到时间",DateGroupEnum.Month,"月")

b.Groups.AddDef("来文机关")

b.Totals.AddDef("编号",AggregateEnum.Count,"记录数") '根据客户列来统计记录数,也就是订单数

dt = b.Build(False) '参数设置为False,生成一个临时表,不在主界面显示

'然后根据统计表生成目录树

Dim trv As WinForm.TreeView = e.Form.Controls("TreeView1")

trv.BuildTree(dt, "年|月|来文机关",,"年 desc")

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 lwjg As String = nd.DataRow("来文机关")

    Select Case nd.Level

        Case 0

            nd.Text = nd.text & "年(" & dt.Compute("Sum(记录数)","年 = " & Year) & "条)"

        Case 1

            nd.Text = nd.text & "月(" & dt.Compute("Sum(记录数)","年 = " & Year & " And 月 = " & Month) & "条)"

        Case 2

            nd.Text = nd.text & "(" & nd.DataRow("记录数") & "条)"

    End Select

Next

trv.Nodes.Insert("显示所有记录","显示所有记录(" & dt.Compute("Sum(记录数)") & "条)",0)

trv.ResumeRedraw