主题：在表B中查找身份证相同行，并复制。

 表A，datacolchanged事件

If e.DataCol.Name = "身份证号" andalso e.DateRow.isnull("身份证号码") = false Then

dim dr as datarow = DataTables("表B").find ("身份证号= '" & e.DateRow("身份证号码") & "'")

if dr isnot nothing then

    Dim nma() As String = {"B1","B2","B3","B4"} 'A表数据来源列
    Dim nmb() As String = {"A1","A2","A3","A4"} 'B表数据接收列
    For i As Integer = 0 To nma.Length - 1
        e.DataRow(nma(i)) = dr(nmb(i))

    Next

end if
End If