主题：[求助]自定义汇总模式

Dim t As Table = Tables("订单")
Dim g As Subtotalgroup
t.SubtotalGroups.Clear()
t.GroupAboveData = False
t.TreeVisible = False
g = New Subtotalgroup
g.Aggregate = AggregateEnum.Sum
g.GroupOn = "雇员"
g.Caption = "{0}"
t.SubtotalGroups.Add(g)
g = New Subtotalgroup
g.Aggregate = AggregateEnum.Sum
g.GroupOn = "客户"
g.Caption = "{0}"
t.SubtotalGroups.Add(g)
g = New Subtotalgroup
g.Aggregate = AggregateEnum.Sum
g.GroupOn = "产品"
g.Caption = "{0}"
t.SubtotalGroups.Add(g)
t.Subtotal()

Dim r As Row
For i As Integer = 0 To t.Rows.Count(True) - 1
    r = t.Rows(i,True)
    If r.IsGroup '如果是分组行
        If r.Level = 0 Then
            Dim f As String = "产品 = '" & r("产品") & "'"
            Dim v As String = " 订单数:" & t.Compute("Count(日期)",f)
            v = v & " 订购数量:" & t.Compute("Sum(数量)",f)
            v = v & " 订购金额:" & t.Compute("Sum(金额)",f)
            r("产品") = r("产品") & ":" & v
        ElseIf r.Level = 1 Then
            Dim pr As Row = t.Rows(r.Index-2, True)
            Dim f As String = "产品 = '" & pr("产品") & "' and 客户 = '" & pr("客户") & "'"
            Dim v As String = " 订单数:" & t.Compute("Count(日期)",f)
            v = v & " 订购数量:" & t.Compute("Sum(数量)",f)
            v = v & " 订购金额:" & t.Compute("Sum(金额)",f)
            r("产品") = pr("产品") & "-" & pr("客户") & ":" & v
        ElseIf r.Level = 2 Then
            Dim pr As Row = t.Rows(r.Index-1, True)
            Dim f As String = "产品 = '" & pr("产品") & "' and 客户 = '" & pr("客户") & "' and 雇员 = '" & pr("雇员") & "'"
            Dim v As String = " 订单数:" & t.Compute("Count(日期)",f)
            v = v & " 订购数量:" & t.Compute("Sum(数量)",f)
            v = v & " 订购金额:" & t.Compute("Sum(金额)",f)
            r("产品") = pr("产品") & "-" & pr("客户") & "-" & pr("雇员") & ":" & v
        End If
    End If
Next