参考
Select Case e.DataCol.Name
Case "姓名","罚款人1","罚款人2","罚款人3","罚款人4"
Dim fdr As DataRow = DataTables("目录").Find("姓名 = '" & e.newValue & "'")
If fdr Is Nothing Then
MessageBox.Show(e.DataCol.name & "输入错误","提示")
e.DataRow.SetError(e.DataCol.name, "姓名输入错误")
Else
e.DataRow.SetError(e.DataCol.name, "")
'e.cancel = True
End If
End Select