主题：关于数据引用与填充

做个按钮，执行代码

Dim Cols1() As String = {"条形码","商品名称","规格"}
Dim Cols2() As String = {"第一列","第二列","第三列"}
For Each dr1 As DataRow In DataTables("表A").Select("[条形码] Is Not Null")
    Dim dr2 As DataRow = DataTables("表C").Find("第一列='" & dr1("条形码") & "'")
    If dr2 Is Nothing Then dr2 = DataTables("表C").AddNew()
    For i As Integer = 0 To Cols1.Length -1
        dr2(Cols2(i)) = dr1(Cols1(i))
    Next
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