主题：数据汇总

比如

Dim dic As new Dictionary(of String,Integer)
DataTables("生产计划下达_BOM分析表").DataRows.Clear()
For Each dr1 As DataRow In DataTables("生产计划下达_生产在制").DataRows
    For Each dr2 As DataRow In DataTables("BOM基础数据").SQLSelect("[成品编码] = '" & dr1("成品编码") & "'")
        Dim nm As String = dr1("生产批次") & "|" & dr2("材料编码") & "|" & dr2("材料描述")
        Dim vl As Integer = dr1("计划数量") * dr2("用量")
        If dic.ContainsKey(nm) = False
            dic.Add(nm,vl)
        Else
            dic(nm) = dic(nm)+ vl
        End If
    Next
Next
For Each key As String In dic.keys
    Dim dr As DataRow = DataTables("生产计划下达_BOM分析表").AddNew()
    Dim cr As Row = Tables("生产计划下达_生产在制").Current
    dr("材料编码") = key.split("|")(1)
    dr("材料描述") = key.split("|")(2)
    dr("生产批次") = key.split("|")(0)
    dr("需求数量") = dic(key)
    dr("毛坯产地") = cr("毛坯产地")
    dr("成品编码") = cr("成品编码")
    dr("成品描述") = cr("成品描述")
    dr("下达日期") = cr("下达日期")
Next