主题：目录树筛选数据统计中如何对节点排序！

'首先生成统计表

Dim dt As DataTable

Dim b As New GroupTableBuilder("统计表1",DataTables("订单编码"))

b.Groups.AddDef("录入时间",DateGroupEnum.Year,"年")

b.Groups.AddDef("录入时间",DateGroupEnum.Month,"月")

'b.Groups.AddDef("录入时间",DateGroupEnum.Date,"日")

b.Groups.AddDef("组别")

b.Groups.AddDef("业务人员")

b.Totals.AddDef("业务人员",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(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 trv2 As WinForm.TreeView = e.Form.Controls("TreeView2")

trv2.BuildTree(dt, "年|月|组别|业务人员")

trv2.StopRedraw

For Each nd As WinForm.TreeNode In trv2.AllNodes

    Dim Year As Integer = nd.DataRow("年")

    Dim Month As Integer = nd.DataRow("月")

    Dim Product As String = nd.DataRow("组别")

    Dim yewurenyuan As String = nd.DataRow("业务人员")

    Select Case nd.Level

        Case 0

            nd.Text = nd.text & "年(" & dt.Compute("Sum(订单数)","年 = " & Year) & "单)"

        Case 1

            nd.Text = nd.text & "月(" & dt.Compute("Sum(订单数)","年 = " & Year & " And 月 = " & Month) & "单)"

        Case 2

            nd.Text = nd.text & "(" & dt.Compute("Sum(订单数)","年 = " & Year & " And 月 = " & Month &  " And 组别 = '" & nd.DataRow("组别") & "'") & "单)"

        Case 3

             nd.Text = nd.text & "(" & dt.Compute("Sum(订单数)","年 = " & Year & " And 月 = " & Month &  " And 组别 = '" & nd.DataRow("组别") & "'   And 业务人员 = '" & nd.DataRow("业务人员") & "'") & "单)" 

 Case 4

            nd.Text = nd.text & "(" & nd.DataRow("订单数") & "单)"

    End Select

Next

trv2.Nodes.Insert("显示所有行","显示所有行(" & dt.Compute("Sum(订单数)") & "单)",0)