程式碼如下：

        <div id="groupNameList" style="overflow-x: auto; overflow-y: auto; height:250px; width:90%;" hidden>
          <ul style="text-decoration:none" *ngFor="let item of list">
            <div (click)="selectGroupName(item.id,item.groupName)">
              <div>
                <label class="groupNameFromList">{{item.groupName}}</label>
              </div>
              <hr style="height:1px;border:none;border-top:1px dashed #0066CC;" />
            </div>
          </ul>
        </div>
 

效果展示：