增加可以獲取的兩個選擇屬性:
//alert($("#cc").combotree("getValue"));  //獲取key
var wordstr=   $("#aa").combotree("getValues");  //獲取多選的key

alert($("#cc").combotree("getText"));      //獲取文字

新增 multiple="true"  支援多選

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 <div class="fl">
                <label class="labelBoxes">@ViewBag.Device</label>
                 <input id="aa" name="DeviceSelected" class="easyui-combotree" multiple="true"
                data-options="valueField:'TypeID',textField:'TypeName'"   panelHeight="100"
                  style=" width:146px;_width:146px;+width:140px; z-index:999; position:relative;"/>             
            </div>
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