jquery easyui-datagrid错误

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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