classno 和studentno两个参数下拉框选择数据库中学生表信息。 要求参数为空时,填报新增记录,该怎么实现 ${if(len(classno) == 0,"","or classno = ('" +classno+ "' )")} ${if(len(studentno) == 0,"","or studentno = ('" +studentno+ "' )")} 这个对嘛,错哪儿了== |
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