BootStrap与Select2使用小结

2019-11-19 17:32:18

字体：大中小

来源：转载

供稿：网友

这个select2组件的功能确实很强大，可以将图片放入到select里面随着文字一起显示。

组件的下载地址以及API说明地址：

1、Select2使用示例地址：https://select2.github.io/examples.html 、http://select2.github.io/select2/

2、Select2参数文档说明：https://select2.github.io/options.html

3、Select2源码：https://github.com/select2/select2

效果图：

HTML代码：

@{ Layout = "~/Views/Shared/_Layout.cshtml";}<script src="/Content/jquery-3.1.1/jquery-3.1.1.min.js" type="text/javascript"></script><script src="/Content/bootstrap-3.3.0/js/bootstrap.min.js" type="text/javascript"></script><link href="/Content/bootstrap-3.3.0/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" type="text/css"/><script src="/Content/Select2_4.0.3/dist/js/select2.full.min.js" type="text/javascript"></script><link href="/Content/Select2_4.0.3/dist/css/select2.min.css" rel="external nofollow" rel="stylesheet" type="text/css" /><script src="/Content/Select2_4.0.3/dist/js/i18n/zh-CN.js" type="text/javascript"></script><script src="/Content/jquery-placeholders-master/jquery.placeholders.min.js" type="text/javascript"></script>@*<link href="http://select2.github.io/select2/bootstrap/css/bootstrap.css" rel="external nofollow" rel="stylesheet"/><link href="http://select2.github.io/font-awesome/css/font-awesome.min.css" rel="external nofollow" rel="stylesheet"/><link rel="stylesheet" href="http://fanyi.youdao.com/web2/styles/all-packed.css?572877" rel="external nofollow" type="text/css"/><script src="http://select2.github.io/js/jquery-1.7.1.min.js" type="text/javascript"></script><script src="http://select2.github.io/select2/bootstrap/js/bootstrap.min.js" type="text/javascript"></script><link href="http://select2.github.io/select2-3.5.3/select2.css?ts=2015-08-29T20%3A09%3A48%2B00%3A00" rel="external nofollow" rel="stylesheet"/><script src="http://select2.github.io/select2-3.5.3/select2.js?ts=2015-08-29T20%3A09%3A48%2B00%3A00" type="text/javascript"></script>*@<script type="text/javascript"> $(document).ready(function () {  $("#test").select2();  //--------------------------------------  $("#test_1").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   theme: "classic"  });  //------------------------------------------------------  $("#test_2").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   placeholder: "请选择",   minimumInputLength: 10 //最小需要输入多少个字符才进行查询  });  //-------------------------------------------------------  $("#test_3").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   placeholder: "请选择",   tags: true,   maximumSelectionLength: 2 //设置最多可以选择多少项  });  //----------------------------------------------------  $("#test_4").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   placeholder: "请选择",   allowClear: true,   tags: true,   maximumSelectionLength: 2, //设置最多可以选择多少项   templateResult: function (state) {   if (!state.id) {     return state.text;   }    console.log(state.element.getAttribute("imgPath"));    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   },   templateSelection: function (state) {    if (!state.id) return state.text; // optgroup    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   }  });  //----------------------------------------------------------  $("#test_5").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   placeholder: "请选择",    tags: true,   maximumSelectionLength: 3, //设置最多可以选择多少项   templateResult: function (state) {    if (!state.id) {     return state.text;    }    console.log(state.element.getAttribute("imgPath"));    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   },   templateSelection: function (state) {    if (!state.id) return state.text; // optgroup    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   }  }).select2('val', ['HI', 'OR', 'NV']);  //-------------------------------------------------------------------  $("#test_6").select2({   language: "zh-CN", //设置 提示语言   width: "100%", //设置下拉框的宽度   placeholder: "请选择",   tags: true,   maximumSelectionLength: 3, //设置最多可以选择多少项   templateResult: function (state) {    if (!state.id) {     return state.text;    }    console.log(state.element.getAttribute("imgPath"));    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   },   templateSelection: function (state) {    if (!state.id) return state.text; // optgroup    var $state = $('<span><img style="width: 30px;height: 20px;" src="' + state.element.getAttribute("imgPath") + '" class="img-flag" /> ' + state.text + '</span>');    return $state;   }  });  //------------------------------------------------------------------  $("#test_7").select2({   ajax: {    url: "Home/GetArea",    dataType: 'json',    delay: 250,    data: function (params) {     return {      q: params.term, // search term      page: params.page     };    },    processResults: function (data, params) {     params.page = params.page || 1;     return {      results: data.items,      pagination: {       more: (params.page * 30) < data.total_count      }     };    },    cache: true   },   escapeMarkup: function (markup) { return markup; }, // let our custom formatter work   minimumInputLength: 1,    language: "zh-CN", //设置 提示语言   maximumSelectionLength: 3, //设置最多可以选择多少项   placeholder: "请选择",   tags: false, //设置必须存在的选项 才能选中   templateResult: function (repo) { //搜索到结果返回后执行，可以控制下拉选项的样式    console.log("====================templateResult开始==================");    console.log(repo);    console.log("====================templateResult结束==================");    if (repo.loading) return repo.text;    var markup = "<div class=''>" + repo.text + "</div>";    return markup;   },   templateSelection: function (repo) { //选中某一个选项是执行    console.log("------------------templateSelection开始-------------------------------------");    console.log( repo);    console.log("------------------templateSelection结束-------------------------------------");    return repo.full_name || repo.text;   }  });  $("#btn").click(function() {   alert($("#test_4").select2("val"));  });  //$("#test_5").prop("disabled", true); //设置是否可用 }); </script><article > 默认 <br/> <select style="width: 300px" id="test" class="form-control">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select> <br/> ---------------------------------------------------- <br/>

1、可搜索选项

<select id="test_1" class="form-control">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select></article>================================<br/>

2、可搜索选项（有搜索关键字控制）

<article> <select id="test_2" class="form-control">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select></article>===============================<br/>

3、多选

<article> <select id="test_3" class="form-control js-example-placeholder-multiple js-states select2-hidden-accessible" multiple="multiple">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select></article>===============================<br/>

4、图文选项

<article> <select id="test_4" class="js-example-templating js-states form-control select2-hidden-accessible" multiple="multiple">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select></article><br/>======================================<br/>

5、默认选中某个选项

<article> <select id="test_5" class="form-control" multiple="multiple">  <optgroup label="Alaskan/Hawaiian Time Zone">   <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>   <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option>  </optgroup>  <optgroup label="Pacific Time Zone">   <option value="CA" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>   <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>   <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>   <option value="WA" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option>  </optgroup>  <optgroup label="Mountain Time Zone">   <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>   <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>   <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>   <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>   <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>   <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>   <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>   <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>   <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option>  </optgroup>  <optgroup label="Central Time Zone">   <option value="AL">Alabama</option>   <option value="AR">Arkansas</option>   <option value="IL">Illinois</option>   <option value="IA">Iowa</option>   <option value="KS">Kansas</option>   <option value="KY">Kentucky</option>   <option value="LA">Louisiana</option>   <option value="MN">Minnesota</option>   <option value="MS">Mississippi</option>   <option value="MO">Missouri</option>   <option value="OK">Oklahoma</option>   <option value="SD">South Dakota</option>   <option value="TX">Texas</option>   <option value="TN">Tennessee</option>   <option value="WI">Wisconsin</option>  </optgroup>  <optgroup label="Eastern Time Zone">   <option value="CT">Connecticut</option>   <option value="DE">Delaware</option>   <option value="FL">Florida</option>   <option value="GA">Georgia</option>   <option value="IN">Indiana</option>   <option value="ME">Maine</option>   <option value="MD">Maryland</option>   <option value="MA">Massachusetts</option>   <option value="MI">Michigan</option>   <option value="NH">New Hampshire</option>   <option value="NJ">New Jersey</option>   <option value="NY">New York</option>   <option value="NC">North Carolina</option>   <option value="OH">Ohio</option>   <option value="PA">Pennsylvania</option>   <option value="RI">Rhode Island</option>   <option value="SC">South Carolina</option>   <option value="VT">Vermont</option>   <option value="VA">Virginia</option>   <option value="WV">West Virginia</option>  </optgroup> </select></article><br/>=========================================<br/>

6、某些选项不能选中

<select id="test_6" class="form-control"> <optgroup label="Alaskan/Hawaiian Time Zone">  <option value="AK" imgPath="https://select2.github.io/vendor/images/flags/ak.png">Alaska</option>  <option value="HI" imgPath="https://select2.github.io/vendor/images/flags/hi.png">Hawaii</option> </optgroup> <optgroup label="Pacific Time Zone">  <option value="CA" disabled="disabled" imgPath="https://select2.github.io/vendor/images/flags/ca.png">California</option>  <option value="NV" imgPath="https://select2.github.io/vendor/images/flags/nv.png">Nevada</option>  <option value="OR" imgPath="https://select2.github.io/vendor/images/flags/or.png">Oregon</option>  <option value="WA" disabled="disabled" imgPath="https://select2.github.io/vendor/images/flags/wa.png">Washington</option> </optgroup> <optgroup label="Mountain Time Zone">  <option value="AZ" imgPath="https://select2.github.io/vendor/images/flags/az.png">Arizona</option>  <option value="CO" imgPath="https://select2.github.io/vendor/images/flags/co.png">Colorado</option>  <option value="ID" imgPath="https://select2.github.io/vendor/images/flags/id.png">Idaho</option>  <option value="MT" imgPath="https://select2.github.io/vendor/images/flags/mt.png">Montana</option>  <option value="NE" imgPath="https://select2.github.io/vendor/images/flags/ne.png">Nebraska</option>  <option value="NM" imgPath="https://select2.github.io/vendor/images/flags/nm.png">New Mexico</option>  <option value="ND" imgPath="https://select2.github.io/vendor/images/flags/nd.png">North Dakota</option>  <option value="UT" imgPath="https://select2.github.io/vendor/images/flags/ut.png">Utah</option>  <option value="WY" imgPath="https://select2.github.io/vendor/images/flags/wy.png">Wyoming</option> </optgroup> <optgroup label="Central Time Zone">  <option value="AL">Alabama</option>  <option value="AR">Arkansas</option>  <option value="IL">Illinois</option>  <option value="IA">Iowa</option>  <option value="KS">Kansas</option>  <option value="KY">Kentucky</option>  <option value="LA">Louisiana</option>  <option value="MN">Minnesota</option>  <option value="MS">Mississippi</option>  <option value="MO">Missouri</option>  <option value="OK">Oklahoma</option>  <option value="SD">South Dakota</option>  <option value="TX">Texas</option>  <option value="TN">Tennessee</option>  <option value="WI">Wisconsin</option> </optgroup> <optgroup label="Eastern Time Zone">  <option value="CT">Connecticut</option>  <option value="DE">Delaware</option>  <option value="FL">Florida</option>  <option value="GA">Georgia</option>  <option value="IN">Indiana</option>  <option value="ME">Maine</option>  <option value="MD">Maryland</option>  <option value="MA">Massachusetts</option>  <option value="MI">Michigan</option>  <option value="NH">New Hampshire</option>  <option value="NJ">New Jersey</option>  <option value="NY">New York</option>  <option value="NC">North Carolina</option>  <option value="OH">Ohio</option>  <option value="PA">Pennsylvania</option>  <option value="RI">Rhode Island</option>  <option value="SC">South Carolina</option>  <option value="VT">Vermont</option>  <option value="VA">Virginia</option>  <option value="WV">West Virginia</option> </optgroup></select><br/>======================================<br/>

7、搜索动态加载下拉选项功能（即在用户输入搜索内容时动态去后台取数据）

<article> <select id="test_7" class=" form-control " multiple="multiple"> </select></article><br/>=========================================<button id="btn">获取选中的值</button>

控制器action代码：

public class HomeController : Controller {  public IEnumerable<string> areaList = new List<string>()  {    "北京市",    "天津市",   "重庆市",   "上海市",   "广州市",    "长沙",    "哈尔滨",    "长春",   "杭州市",    "南京市",   "福建市",   "河北省",    "山西省",    "辽宁省",    "吉林省",    "黑龙江省",   "江苏省",   "浙江省",    "安徽省",    "福建省",    "江西省",    "山东省",    "河南省",   "湖北省",    "湖南省",   "广东省",    "海南省",    "四川省",   "贵州省",    "云南省",    "陕西省",    "甘肃省",   "青海省",   "台湾省",   "内蒙古自治区",    "广西壮族自治区",    "西藏自治区",    "宁夏回族自治区",   "新疆维吾尔自治区",    "香港特别行政区",    "澳门特别行政区"   };  public JsonResult GetArea(string q, string page)  {   var area = new { id = 1, name = "" };   var lstRes = areaList.Select((t, i) => new Area   {    id = i,    text = t,    element = "element" + i   });   if (!string.IsNullOrEmpty(q.Trim()))   {    lstRes = lstRes.Where(x => x.text.Contains(q));   }   var lstCurPageRes = string.IsNullOrEmpty(page) ? lstRes.Take(10) : lstRes.Skip(Convert.ToInt32(page) * 10 - 10).Take(10);   return Json(new { items = lstCurPageRes, total_count = lstRes.Count() }, JsonRequestBehavior.AllowGet);  }  public ActionResult Index()  {   return View();  } }namespace Select2Demo.Models{ public class Area {  public int id { get; set; }  public string text { get; set; }  public string element { get; set; } }}

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