angularjs实现下拉列表的选中事件示例

网络编程 2024/11/15 佚名

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select标签的对于大家来说很熟悉了，下面我来讲讲AngularJS中对select的属性设置，做出选择某个下拉选项后控制其他标签的隐藏；

<select style="height:31px; width:100px" id="rewardMethod"name="rewardMethod" class="status_select" ng-model="state">
<option value="0" ng-selected='rewardMethod == "0"'>自动发放</option>
<option value="1" ng-selected='rewardMethod == "1"'>指定中奖人</option>
<option value="2" ng-selected='rewardMethod == "2"'>不发放奖品</option>
</select>

<div class="form-group" ng-if="state != 2">
            <label class="col-sm-3 control-label no-padding-right"
                for="form-field-1">优惠券</label>
            <div class="col-sm-9">
              <select style="height:31px; width:100px" id="reward"
                  name="reward" class="status_select">
                <option ng-repeat='item in couponList' ng-value="item.id"
                    ng-selected="couponInfoid == item.couponName">{{item.couponName}}
                  总数:{{item.countLimit}}
                </option>
              </select>
            </div>
          </div>
          <div class="form-group" ng-if="state == 0">
            <label class="col-sm-3 control-label no-padding-right"
                for="form-field-1"><span class="red">*</span>奖品发放数量</label>
            <div class="col-sm-9">
              <input type="text" name="rewardProvideCount" id="rewardProvideCount"
                  class="form-control"
                  check-type="required">
            </div>
          </div>
        </form>
      </div>

其中在select中设ng-model = “state”双向绑定数据，他的值会随你选择下拉项而改变，就是选中的option的value；在下面的div中设置ng-if="state == 1" 进行控制；

当页面进行修改操作的时候，需要把原来的值填入表单中，所以加了ng-selected='rewardMethod == "2"'

在controller。js中设置$scope.rewardMethod=2;这样加载页面就会选中第三项；效果如下：