请前辈看下为啥这三表合并不了 - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

Dim g As New GroupTableBuilder("进货表", DataTables("ic_t_inout_store_detail"))

Dim dt1 As fxDataSource

'g.Groups.AddDef("sheet_no")

g.Groups.AddDef("barcode")

g.Totals.AddDef("in_qty", "进货_数量")

g.Totals.AddDef("金额", "进货_金额")

g.Filter = "[sheet_no] Like 'PI%'"

dt1 = g.BuildDataSource()

Dim g2 As New GroupTableBuilder("销售流水表", DataTables("pos_t_saleflow"))

Dim dt2 As fxDataSource

g2.Groups.AddDef("商品条码")

'g.Groups.AddDef("商品名称")

g2.Totals.AddDef("sale_qnty", "销售_数量")

g2.Totals.AddDef("实际金额", "销售_金额")

g2.Filter = "[商品属性] = 0118 And sell_way = 'A'"

dt2 = g2.BuildDataSource()

Dim g3 As New GroupTableBuilder("销售退货表", DataTables("pos_t_saleflow"))

Dim dt3 As fxDataSource

g3.Groups.AddDef("商品条码")

'2.Groups.AddDef("商品名称")

g3.Totals.AddDef("sale_qnty", "退货_数量")

g3.Totals.AddDef("实际金额", "退货_金额")

g3.Filter = "[商品属性] = " & txt & " and sell_way = 'B'"

dt3 = g3.BuildDataSource()

dt1.Combine("barcode",dt2,"商品条码")

dt1.Combine("barcode",dt3,"商品条码")

Tables("库销存_Table1").DataSource = dt1 '将统计结果绑定到Table

这是代码，情况是每一个表单独Tables("库销存_Table1").DataSource = dt1、2、3 都能显示出来唯独combine一合并只显示dt1的 dt2dt3的不显示

主题：请前辈看下为啥这三表合并不了