当我选择项目时，组合框验证可以改变

Question

当我从组合框中选择项目时，如何在mvc项目中更改验证？

Answer 1

<select id="sel">
  <option value="1">1</option>
  <option value="2">2</option>
  <option value="3">3</option>
</select>

JS

var sel = document.getElementById('sel');
sel.onchange = function() {
  var selected_value = this.value;
  // do your validation
}