分享一个使用Yii2中dropdownlist实现地区三级联动的例子 [ 2.0 版本 ]

之前也一直在找这方面的资料,拼拼凑凑的终于用js实现了地区三级联动,说实话,看源代码有点吃力,功力不够,吃了很多苦,加上百度出来的资料虽然没啥用,但总还是能找到出发点的.

    <?php
    use yii\helpers\Url;
    use yii\widgets\ActiveForm;
    use yii\helpers\ArrayHelper;
    use yii\helpers\Html;

    /* @var $this yii\web\View */
    /* @var $model common\search\service\ItemSearch */
    /* @var $form yii\widgets\ActiveForm */
    ?>
    <div class="row">
        <div class="item-search">
            <?php $form = ActiveForm::begin([
                'action' => ['index'],
                'method' => 'get',
                'options' => ['class' => 'form-inline']
            ]); ?>

            <?= $form->field($model, 'cityName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($cities, 'id', 'name'), ['prompt' => '请选择城市'])->label('请选择城市', ['class' => 'sr-only']) ?>

            <?= $form->field($model, 'areaName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($areas, 'id', 'name'), ['prompt' => '请选择区县'])->label('请选择区县', ['class' => 'sr-only']) ?>

            <?= $form->field($model, 'communityName', ['options' => ['class' => 'form-group col-lg-2']])->dropDownList(ArrayHelper::map($communities, 'id', 'name'), ['prompt' => '请选择小区'])->label('请选择小区', ['class' => 'sr-only']) ?>

            <div class="col-lg-2 col-lg-offset-1">
                <input class="form-control" id="keyword" placeholder="请输入小区名" value="" />
            </div>
            <div class="col-lg-1">
                <button type="button" id="search-community" class="btn btn-info">搜索</button>
            </div>
            <p></p>

            <div class="form-group col-lg-1 pull-right">
                <?= Html::submitButton('搜索', ['class' => 'btn btn-primary']) ?>
            </div>

            <?php ActiveForm::end(); ?>
        </div>
    </div>
    <p>&nbsp;</p>
    <?php
    $this->registerJs('
        //市地址改变
        $("#itemsearch-cityname").change(function() {
            //市id值
            var cityid = $(this).val();
            $("#itemsearch-areaname").html("<option value=\"0\">请选择区县</option>");
            $("#itemsearch-communityname").html("<option value=\"0\">请选择小区</option>");
            if (cityid > 0) {
                getArea(cityid);
            }
        });

        //区地址改变
        $("#itemsearch-areaname").change(function() {
            //区id值
            var areaid = $(this).val();
            $("#itemsearch-communityname").html("<option value=\"0\">请选择小区</option>");
            if (areaid > 0) {
                getCommunity(areaid);
            }
        });

        //获取市下面的区列表
        function getArea(id)
        {
            var href = "' . Url::to(['/service/base/get-area-list'], true). '";

            $.ajax({
                "type"  : "GET",
                "url"   : href,
                "data"  : {id : id},
                success : function(d) {
                    $("#itemsearch-areaname").append(d);
                }
            });
        }

        //获取区下面的小区列表
        function getCommunity(id)
        {
            var href = "' . Url::to(['/service/base/get-community-list'], true) . '";
            $.ajax({
                "type"  : "GET",
                "url"   : href,
                "data"  : {id : id},
                success : function(d) {
                    $("#itemsearch-communityname").append(d);
                }
            });
        }

        //搜索小区
        $("#search-community").click(function() {
            var word   = $("#keyword").val();
            var areaid = $("#itemsearch-areaname option:selected").val();
            var href   = "' . Url::to(['/service/base/search-community'], true) . '";

            if (areaid > 0) {
                $.ajax({
                    "type"  : "GET",
                    "url"   : href,
                    "data"  : {id : areaid, word : word},
                    success : function(d) {
                        $("#itemsearch-communityname").html(d);
                    }
                });
            }
        });
    ');
    ?>