combobox联动

 var store=new Ext.data.Store({
  3        autoLoad:true,
  4        proxy:new Ext.data.HttpProxy({
  5            url:'../admin/GetCatWise.aspx'
  6        }),
  7        reader:new Ext.data.JsonReader({
  8            id:'ID',
  9            fields:['ID','Name']
 10        }),
 11        remoteSort:true
 12    });
 13     //第二个ComboBox数据源
 14    var comstore =new Ext.data.Store({
 16        autoLoad:false,
 17        proxy:new Ext.data.HttpProxy({
 18            url:'../admin/GetCategory.aspx',
 20            method:'post'
 21        }),
 22        reader:new Ext.data.JsonReader({
 23            id:'ID',
 24            fields:['ID','CategoryName']
 25        }),
 26            remote:true
 27    });
 28
 29var form=new Ext.form.FormPanel({
 30        labelWidth:55,
 32        bodyStyle:'padding:5px 5px 0',
 33        frame:true,
 34        items:[{
 74            fieldLabel:'分类方式',
 75            xtype:'combo',
 76            editable :false,
 77            name:'labCatWise',
 78            id:'cmbCatWise',
 79            lazyInit:false,
 80            emptyText :'请选择',
 81            displayField:'Name',
 82            valueField :'ID',
 83            mode:'local',
 84            store:store,
 85            listeners:{select:function(){
 86                try{
 87                    var parent=Ext.getCmp('comParent');
 90                    parent.store.reload({params:{wiseID:this.value}});
 91                }
 92                catch(ex)
 93                {
 94                    Ext.MessageBox.alert(ex);
 95                }
 96            }},
 97            triggerAction:'all',
 98            typeAhead :true,
 99            anchor:'100%'
100            
101        }, {
102            fieldLabel:'所属父类',
103            xtype:'combo',
104            editable :false,
105            emptyText :'请选择',
106            id:'comParent',
107            loadingText :'正在请求数据,请稍后',
108            store:comstore,
109            displayField:'CategoryName',
110            valueField :'ID',
111            mode:'local',
112            triggerAction:'all',
113            name:'labParent',
114            anchor:'100%'
115        }]
121    });