bootstrap与Select2使用小结

2022-06-20 02:14:57

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：

bootstrap与Select2使用小结

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="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="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="stylesheet"/>

<link href="http://select2.github.io/font-awesome/css/font-awesome.min.css" rel="stylesheet"/>

<link rel="stylesheet" href="http://fanyi.youdao.com/web2/styles/all-packed.css?572877" 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="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",

            "*省",

            "内蒙古自治区",

            "广西壮族自治区",

            "*自治区",

            "宁夏回族自治区",

            "**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 = , 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() : lstRes.Skip(Convert.ToInt32(page) *  - ).Take();

            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; }

    }

}

详细demo下载地址： http://pan.baidu.com/s/1qYvpzo4 密码：yvag

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