以前一直是用jsonstore加載遠(yuǎn)程數(shù)據(jù)，最近要做combox加載webservice返回的本地?cái)?shù)據(jù)，進(jìn)了誤區(qū)弄了好久，不過(guò)把store研究了下，自己做個(gè)記錄方便以后使用，也給遇到同樣問(wèn)題的同學(xué)做個(gè)參考
1.1：jsonstore加載遠(yuǎn)程數(shù)據(jù)：
var dictComboBox = new Ext.form.ComboBox({
fieldLabel:'證件類(lèi)型',
id:'idNoType',
name:'dictType',
readOnly:false,
triggerAction:'all',
editable:false,
anchor:'90%',
emptyText:'請(qǐng)選擇...',
store:new Ext.data.JsonStore({
url:this.basePath+'BasePackage/common_getSystemDictionaryItem?item_id=20003',
fields:["dictValue","dictValueDesc"],
root:'field1'       
}),
valueField:'dictValue',
displayField:'dictValueDesc'
});
遠(yuǎn)程返回?cái)?shù)據(jù)格式：json
{"field1":[{"dictValue":"","dictValueDesc",""},{"dictValue":"","dictValueDesc",""}]}
最好加上editable:false，否則可以自己輸入，導(dǎo)致傳的數(shù)據(jù)格式出問(wèn)題

1.2：jsonstore加載本地?cái)?shù)據(jù)
var cardComboBox = new Ext.form.ComboBox({
fieldLabel:'卡號(hào)',
id:'oldCard',
name:'dictType',
readOnly:false,
triggerAction:'all',
editable:false,
anchor:'90%',
mode:'local',
emptyText:'請(qǐng)選擇...',
store:cardStore,
displayField:'card_no'
});
var cardStore = new Ext.data.JsonStore({
fields:['card_no'],
root:'field1'
});
Ext.Ajax.request({url:...,
params:{requesttype:"ajax"},
jsonData:jsonString,
callback:function (options, success, response) {
if (success) {
var jsonObj = Ext.util.JSON.decode(response.responseText);
if (jsonObj.result) {
var retField1 = jsonObj.field1;
if(retField1.length == 0){
...
return;
}else{
cardStore.loadData(jsonObj);
}
} else {GridView之CommandField的點(diǎn)擊提示刪除
    ...
}
} else {
...
}
}});
ajax返回的json數(shù)據(jù)格式：
{"result":true,"field1":[{"card_no":""},{"card_no":""}]}
之前沒(méi)怎么看過(guò)combobox，combobox默認(rèn)的讀取數(shù)據(jù)方式是遠(yuǎn)程讀取，需要設(shè)url或proxy，沒(méi)設(shè)會(huì)一直包proxy對(duì)象為空，mode:'local'將combobox設(shè)置為讀取本地?cái)?shù)據(jù)。