通过Upload 的action方法 返回不了结果，可以通过on-success方法中获取返回结果

<Upload accept=".xls, .xlsx" :action="uploadUrl" :on-success="onSuccess" :on-error="handleError" :before-upload="beforeUpload" style="float:right">

          <Button type="primary" icon="ios-cloud-upload-outline" >导入</Button>

 </Upload>

--------------------------------------------------------------------------------------------------------------

computed: {

     uploadUrl() {       

      return baseUrl + "/ImportExcel/";     

    }

//file为ImportExcel方法返回的结果

onSuccess(file){

       if(file.code=="1")

       {

         this.$Message.error("导入失败:" + file.msg);

         return;

       }            

     },