简单实现方式如下所示：（加载的时候会自动显示值 数据库存的是学历名称值 ）
managDegree : new Ext.ux.BaseDataComboBox({
fieldLabel : "学历",
name : "managDegree",
storeParams:{className:'ManagerDegree',author:'',orderBy:' order by {managDegreeCode}'},
fields : ['managDegreeCode','managDegreeName'],
title : "(<font color=black>学历代码</font>)<font color=blue>学历名称</font>",
tpl:'<tpl for="."><div class="x-combo-list-item">({managDegreeCode})<font color=blue>{managDegreeName}</font></div></tpl>',
//disabled : this.readOnly,
allowBlank : true,
emptyText : '请选择',
selectOnFocus:true,
valueField:'managDegreeName',
directFn: IORegisterChangeAction.getJsonArrayResultPagesByValues,
listeners : {
change : function(field, newValue, oldValue) {
this.editStatus = "系统正在校验<" + field.fieldLabel + ">,请稍后尝试保存!";
IORegisterChangeAction.getJsonObjectForBaseData('ManagerDegree','managDegreeName',newValue, function(result, e){
this.editStatus = null;
if (!Ext.isEmpty(result)) {
if (result.success) {
field.setValue("");
if (!Ext.isEmpty(result.data) && result.data.length>0) {
var c = '('+result.data[0].managDegreeCode+')'+result.data[0].managDegreeName;
field.setValue(c);
}
}
}
}.createDelegate(this));
}.createDelegate(this)
}
}),