Select Case e.datacol.Name
Case "列名1", "列名2"
Dim dr As DataRow
dr = DataTables("表B").Find("列名1='" & e.datarow("列名1") & "' And 列名2='" & e.datarow("列名2") & "'")
If dr IsNot Nothing Then '如果找到
dr("列名1") = e.datarow("列名1")
dr("列名2") = e.datarow("列名2")
Else
Dim dx As DataRow = DataTables("表B").AddNew
dx("列名1") = e.datarow("列名1")
dx("列名2") = e.datarow("列名2")
End If
End Select