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表C中有很多列  此表为数据接收表

设置那个事件，或者做一个按钮

可以提取表A中的数据依次填充到表C 的 对应列 （表A 和表C 结构不同）

如果接收列中条形码对应列有重复值，提示是否需要更新，如果没有重复值则直接填充

请教大神 

Dim Cols1() As String = {"来源列一","来源列二","来源列三"}
Dim Cols2() As String = {"接收列一","接收列二","接收列三"}
For Each dr1 As DataRow In DataTables("表A").Select("[金额] > 100")
    Dim dr2 As DataRow = DataTables("表B").AddNew()
    For i As Integer = 0 To Cols1.Length -1
        dr2(Cols2(i)) = dr1(Cols1(i))
    Next
Next

Dim Vals As List(of String())
Vals = DataTables("表A").GetValues("条形码|商品名称")
For i As Integer = 0 To Vals.Count - 1
    Dim dr As DataRow = DataTables("表B").AddNew()
    dr("第一列") = Vals(i)(0)
    dr("第二列") = Vals(i)(1)
Next

这段代码他确实填充了，但是填充了N多遍 食怎么回事

求教啊 

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
Next