计数更改为求和 - 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 sum as integer

For Each f As Row In Tables("包装箱需求明细_发货明细").GetCheckedRows
    Dim s2 As DataRow = w.DataTable.Find("材料编码='" & f("材料编码") & "' and 材料描述 ='" & f("材料描述") & "'")
    If s2 Is Nothing Then
        s2 = w.DataTable.addnew
        s2("材料编码") = f("材料编码")
        s2("材料描述") = f("材料描述")
        s2("下达日期") = Date.Today
        s2("规格型号") = f("规格型号")
        s2("包装箱尺寸") = f("包装箱尺寸")
  sum = sum +1

s2("需求数量") =sum
End If
Next

主题：计数更改为求和