主题：获取不重复的值填充

Dim Cols1() As String = {"试样编号"}
Dim Cols2() As String = {"试样编号"}
For Each dr1 As DataRow In DataTables("表A").Select("[部件图号] > 0")
    Dim dr2 As DataRow = DataTables("表B").Find("试样编号 = '" & dr1("试样编号") & "'")
    If dr2 Is Nothing Then
        dr2 = DataTables("表B").AddNew()
    End If
    For i As Integer = 0 To Cols1.Length -1
        dr2(Cols2(i)) = dr1(Cols1(i))
    Next
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