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Example code for jquery to operate select elements and options_jquery

WBOYOriginal: 2016-05-16 15:16:18971browse

Without further ado, I will post the code directly for you. The specific code is as follows:

<html>
<head>
  <title></title>
  <!--添加jquery-->
  <script src="../Script/jQuery/jquery-1.6.2.min.js" type="text/javascript"></script>
  <script type="text/javascript">
    $(function () {
      createSelect("addSel");
      addOption("addSel", "first", "第一个数据");
      addOption("addSel", "secord", "第二个数据");
      addOption("addSel", "three", "第三个数据");
      addOption("addSel", "four", "第四个数据");
      addOption("addSel", "fives", "第五个数据");
      removeOneByIndex("addSel", 0);
      removeOneByValue("addSel", "three");

      //****************以验证不可以根据text值取得option元素***********************
      //removeOneByText("addSel", "第三个数据");
      //****************以验证不可以根据text值取得option元素***********************

      //removeAll("addSel");   //删除select元素的所有options
      //removeSelect("addSel"); //删除select元素；

      setDefaultByValue("addSel", "four"); //设置option的默认值

      //添加一个option更改事件 调用自己写的方法
      $("#addSel").change(function () {
        alert("旧文本：" + getOptionText("addSel") + "   旧Value：" + getOptionValue("addSel"));
        editOptions("addSel", "新文本", "新Value"); //注意：不传value值的时候 value值默认为text的值
        alert("新文本：" + getOptionText("addSel") + "   新Value：" + getOptionValue("addSel"));
      })
    })

    //动态创建带id的select
    function createSelect(id) {
      $("body").append("<select id="+id+"></select>");
    }

    //根据select的id 添加选项option
    function addOption(selectID,value,text) {
      //根据id查找select对象， 
      var obj = $("#" + selectID + "");
      $("<option></option>").val(value).text(text).appendTo(obj);
    }

    //根据value的值设置options默认选中项
    function setDefaultByValue(selectID,value) {
      var obj = $("#" + selectID + "");
      obj.val(value);
    }

    //获得选中的Option Value；
    function getOptionValue(selectID) {
      //var obj = $("#" + selectID + " option:selected").val(); 
      //上面和下面两种都可以
      var obj = $("#" + selectID + "").find("option:selected").val();
      return obj;
    }

    //获得选中的option Text;
    function getOptionText(selectID) {
      //var obj = $("#" + selectID + " option:selected").text();
      //上面和下面两种都可以
      var obj = $("#" + selectID + "").find("option:selected").text();
      return obj;
    }

    //修改选中的option
    function editOptions(selectID, newText, newValue) {
      var obj = $("#" + selectID + "").find("option:selected");
      obj.val(newValue).text(newText);
    }

    //根据 index 值删除一个选项option
    function removeOneByIndex(selectID, index) {
      var obj = $("#" + selectID + " option[index=" + index + "]");
      obj.remove();
    }

    //根据 value值删除一个选项option
    function removeOneByValue(selectID, text) {
      var obj = $("#" + selectID + " option[value=" + text + "]");
      obj.remove();
    }

    //****************以验证不可以根据text值取得option元素***********************
    //根据text值删除一个选项option  感觉不可用 真的
    //function removeOneByText(selectID, text) {
    //var obj = $("#" + selectID + " option[text=" + text + "]");
    //obj.remove();
    //}
    //****************以验证不可以根据text值取得option元素***********************

    //删除所有选项option
    function removeAll(selectID) {
      var obj = $("#" + selectID + "");
      obj.empty();
    }

    //删除select
    function removeSelect(selectID){
      var obj = $("#" + selectID + "");
      obj.remove();
    }
  </script>
</head>
<body>

</body>
</html>

The above is the example code of jquery operating select elements and options shared by the editor. I hope it will be helpful to everyone.

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