jquery easyui-datagrid错误

jquery.easyui.min.js:8853 Uncaught TypeError: Cannot read property 'data' of undefined
    at Object.getData (jquery.easyui.min.js:8853)
    at init.$.fn.datagrid (jquery.easyui.min.js:8610)
    at board_list_datagrid_onLoadSuccess (eval at globalEval (jquery.min.js:1), <anonymous>:4:73)
    at eval (eval at parseOptions (jquery.easyui.min.js:51), <anonymous>:2:23)
    at Object.parseOptions (jquery.easyui.min.js:51)
    at Function.$.fn.panel.parseOptions (jquery.easyui.min.js:2989)
    at Function.$.fn.datagrid.parseOptions (jquery.easyui.min.js:9001)
    at HTMLTableElement.<anonymous> (jquery.easyui.min.js:8620)
    at Function.each (jquery.min.js:1)

    at init.each (jquery.min.js:1)

问题已经找到，数据还没加载，通过下面获取不到

var data = $("#proPurGoodsTotalDemand_list_datagrid_wholesale_${depot.id}").datagrid("getData");

解决方法：

data-options="onLoadSuccess:function(data){   board_list_datagrid_onLoadSuccess(${it},data)}"

onLoadSuccess会传一个data参数