主题：[求助]如果统计后台数据，还需加什么代码？

Dim bd1 As New GroupTableBuilder("统计表1",DataTables("成品进仓表"))

Dim dt1 As fxDataSource

bd1.Groups.AddDef("仓库名称") '根据型号分组

bd1.Groups.AddDef("箱号")

bd1.Groups.AddDef("入库条码")

bd1.Groups.AddDef("型号")

bd1.Groups.AddDef("规格")

'bd1.Groups.AddDef("厂商代号")

'bd1.Groups.AddDef("单边方向")

'bd1.Groups.AddDef("进仓日期")

'bd1.Groups.AddDef("冻结")

bd1.Filter = "仓库名称 = '单边仓' And 冻结 = 1 "

bd1.Totals.AddDef("只数","进仓只数") '对数量进行统计

bd1.Totals.AddDef("净重","进仓重量") '对金额进行统计

dt1 = bd1.BuildDataSource()

Dim bd2 As New GroupTableBuilder("统计表2",DataTables("成品出仓表"))

Dim dt2  As fxDataSource

bd2.Groups.AddDef("仓库名称") '根据型号分组

bd2.Groups.AddDef("箱号") '根据型号分组

bd2.Groups.AddDef("入库条码")

bd2.Groups.AddDef("型号") '根据型号分组

bd2.Groups.AddDef("规格") '根据型号分组

'bd2.Groups.AddDef("厂商代号") '根据型号分组

'bd2.Groups.AddDef("出仓日期") '根据型号分组

bd2.Filter = "确认日期 is not null"

bd2.Totals.AddDef("只数","出仓只数") '对数量进行统计

bd2.Totals.AddDef("净重","出仓重量") '对金额进行统计

dt2 = bd2.BuildDataSource()

Dim nms As String() = {"仓库名称","箱号","入库条码","型号","规格"}

dt1.Combine(nms,dt2,nms) '将销售统计数据组合到进货统计数据

Tables("选择单边_单边库存表").DataSource = dt1 '将统计结果绑定到Table

With DataTables("选择单边_单边库存表").DataCols  '用表达式列计算库存数据

    .Add("当前库存只数",Gettype(Double), "IsNull([进仓只数],0) - ISNULL([出仓只数],0)")

    .Add("当前库存重量",Gettype(Double), "IsNull([进仓重量],0) - ISNULL([出仓重量],0)")

End With