Extjs 4 ComboBox下拉框联动效果：?http://extjshelp.sinaapp.com/combo/?原理是，处理第一个combo的change
Extjs 4 ComboBox下拉框联动
效果：?http://extjshelp.sinaapp.com/combo/
?原理是，处理第一个combo的change事件，过滤第二个combo的store:
?
Ext.onReady(function(){Ext.create("Ext.form.ComboBox",{id:'schoolCombo',fieldLabel:'学校',labelAlign:'right',store:["红领小学","光辉中学"],listeners:{ change:function(schoolCombo){var school = schoolCombo.getValue() var studentStore = Ext.getCmp("studentCombo").getStore()studentStore.clearFilter();studentStore.filter("school",school) } },renderTo:'school'})Ext.create("Ext.form.ComboBox",{id:'studentCombo',fieldLabel:'学生',labelAlign:'right',displayField:'student',valueField:'student',store:{type:'array',fields:["school","student"],data:[["红领小学",'张三'],["红领小学",'朱重八'],["光辉中学",'陈九四'],["红领小学",'李咬金'],],},renderTo:'student'})})<html><head><link rel="stylesheet" type="text/css" href="../extjs/resources/css/ext-all.css"><script type="text/javascript" src="../extjs/ext-all.js"></script><script type="text/javascript" src="app.js"></script></head><body><div id="school"></div><div id="student"></div></body></html>