主题：代码中如下两句 总是不能实现正确判断，当有身份证号已经有记录是，执行第一个，然后写入二次登记表，当无记录时，执行第二个，然后写入登记表

Dim nms() As String = {"学校","班级","亲属姓名","学生姓名","是否有症状","是否外出"} '不能为空的列名数组

Dim nms() As String = {"学校","班级","亲属姓名","学生姓名","与学生关系","身份证号","联系电话","现居住地","居住类型","班主任姓名","是否有症状","是否外出"} '不能为空的列名数组

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