ExtJs报表没有显示数据

ExtJs报没有显示数据 ExtJs表格没有显示数据 菜鸟求助，为什么下面的代码没有显示。求解。。。。。 JS如下: JScript code Ext.onReady(function(){ var cm = new Ext.grid.ColumnModel([ {header:'编号',dataIndex:'id'}, {header:'名称',dataIndex:'name'}, {header:'描述',dataIndex:'descn'} ]); var data = [ ['1','name1','descn1'], ['2','name2','descn2'], ['3','name3','descn3'], ['4','name4','descn4'], ['5','name5','descn5'] ]; var store = new Ext.data.Store({ proxy:new Ext.data.MemoryProxy(data), reader:new Ext.data.ArrayReader([ {name:'id'}, {name:'name'}, {name:'descn'} ]) }); store.load(); var grid = new Ext.grid.GridPanel({ renderTo:'grid', store:store, cm:cm }); }); HTML如下: HTML code html head meta http-equiv= content-type content= text/html; charset=utf-8 link rel= stylesheet type= text/css href= ../../resources/css/ext-all.css script type= text/javascript src= ../../adapter/ext/ext-base.js /script script type= text/javascript src= ../../ext-all-debug.js /script script type= text/javascript src= Hello.js /script script type= text/javascript src= ../../source/locale/ext-lang-zh_CN.js /script /head body div id='grid' /div /body /html 结果如下: ------解决-------------------------------------------------------- var cm = new Ext.grid.ColumnModel([ {header:'编号',dataIndex:'id'}, {header:'名称',dataIndex:'name'}, {header:'描述',dataIndex:'descn'} ]); 把这一部分放到 var store = new Ext.data.Store({ proxy:new Ext.data.MemoryProxy(data), reader:new Ext.data.ArrayReader([ {name:'id'}, {name:'name'}, {name:'descn'} ]) }); 后面，dataIndex:''指向已经定义好的列，你都没定义，怎么使用