主题：统计目录树问题

b.Groups.AddDef("项目名称")
b.Groups.AddDef("施工合同段")
b.Groups.AddDef("劳务队名称")
b.Groups.AddDef("工种")
b.Totals.AddDef("姓名",AggregateEnum.Count,"人数") '根据客户列来统计记录数,也就是订单数
b.Totals.AddExp("退场人数", "iif(退场时间 is null, 0, 1)")  '根据客户列来统计记录数,也就是订单数

dg = b.Build(True) '参数设置为True,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(dg,"项目名称|施工合同段|劳务队名称|工种")
trv.StopRedraw
For Each nd As WinForm.TreeNode In trv.AllNodes
    Dim Xmmc As String = nd.DataRow("项目名称")
    Dim Xghtd As String =  nd.DataRow("施工合同段")
    Dim Lwdmc As String = nd.DataRow("劳务队名称")
    Dim Gz As String = nd.DataRow("工种")
    Select Case nd.Level
        Case 0
            'nd.Text = nd.text & "(" & dg.Compute("Sum(人数)","项目名称 = " & Xmmc) & "人)"
            Dim sy = dg.Compute("Sum(人数)", "项目名称 = '" & Xmmc & "'")
            Dim ttc = dg.Compute("Sum(退场人数)", "项目名称 = '" & Xmmc & "'")
            nd.Text = nd.text & "(在场" & sy-ttc & "人,退场" & ttc & "人)"
        Case 1
            'nd.Text = nd.text & "(" & dg.Compute("Sum(人数)","项目名称 = " & Xmmc & " And 施工合同段 = " & Xghtd) & "人)"
            Dim sy = dg.Compute("Sum(人数)", "项目名称 = '" & Xmmc & "' And 施工合同段 = '" & Xghtd & "'")
            Dim ttc = dg.Compute("Sum(退场人数)", "项目名称 = '" & Xmmc & "' And 施工合同段 = '" & Xghtd & "'")
            nd.Text = nd.text & "(在场" & sy-ttc & "人,退场" & ttc & "人)"
        Case 2
            'nd.Text = nd.text & "(" & dg.Compute("Sum(人数)","项目名称 = " & Xmmc & " And 施工合同段 = " & Xghtd & " And 劳务队名称 = " & Lwdmc) & "人)"
            Dim sy = dg.Compute("Sum(人数)", "项目名称 = '" & Xmmc & "' And 施工合同段 = '" & Xghtd & "'")
            Dim ttc = dg.Compute("Sum(退场人数)", "项目名称 = '" & Xmmc & "' And 施工合同段 = '" & Xghtd & "' And 劳务队名称 = '" & Lwdmc & "'")
            nd.Text = nd.text & "(在场" & sy-ttc & "人,退场" & ttc & "人)"
        Case 3
            nd.Text = nd.text & "(" & nd.DataRow("人数") & "人)"
    End Select
Next
'trv.Nodes.Insert("加载所有数据","加载所有数据(" & dg.Compute("Sum(人数)") & "人)",0)

Dim suoyou = dg.Compute("Sum(人数)")
Dim tc = dg.Compute("Sum(退场人数)")
trv.Nodes.Insert("加载所有数据","加载所有数据(在场" & suoyou-tc & "人,退场" & tc & "人)",0)
trv.ResumeRedraw