jQuery从下拉列表中获取选定的选项

You can select using exact selected option : Below will give innerText

$("select#aioConceptName > option:selected").text()

While below will give you value.

$("select#aioConceptName > option:selected").val()

You can use $("#drpList").val();

Use the jQuery.val() function for select elements, too:

The .val() method is primarily used to get the values of form elements such as input, select and textarea. In the case of select elements, it returns null when no option is selected and an array containing the value of each selected option when there is at least one and it is possible to select more because the multiple attribute is present.

$(function() {
  $("#aioConceptName").on("change", function() {
    $("#debug").text($("#aioConceptName").val());
  }).trigger("change");
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

<select id="aioConceptName">
  <option>choose io</option>
  <option>roma</option>
  <option>totti</option>
</select>
<div id="debug"></div>

尝试此物有所值...

$("select#id_of_select_element option").filter(":selected").val();

或这个文本...

$("select#id_of_select_element option").filter(":selected").text();