extjs JsonStore加载数据,Combobox只显示最后一项值问题

extjs3.3.1版本

JsonStore代码

var sexStore_para = new Ext.data.JsonStore({//对应类别store url:'/himp/related_user_info!getTheDataProvidedToComboboxAjax.action',//'/financeStaff.do?method=dictData', // root:'model', fields:[{ name:'returnValue', mapping:'itemid' },{ name:'displayText', mapping:'itemname' }] });
请求返回Json数据

[{"id":0,"itemid":"","itemname":"<全部>","pycode":null,"wbcode":null,"gbcode":null,"parentcode":null,"issys":null,"numvalue":null},{"id":2,"itemid":"1","itemname":"男","pycode":null,"wbcode":null,"gbcode":null,"parentcode":null,"issys":"2","numvalue":null},{"id":2,"itemid":"2","itemname":"女","pycode":null,"wbcode":null,"gbcode":null,"parentcode":null,"issys":"2","numvalue":null},{"id":2,"itemid":"9","itemname":"未知","pycode":null,"wbcode":null,"gbcode":null,"parentcode":null,"issys":"2","numvalue":null}]
id代表的是数据库中的一个字段,代表的是类型ID,而非位置的id值

问题;

如何解决这个问题:

需要将以上代码改正为一下代码:

var sexStore_para = new Ext.data.JsonStore({//对应类别store url:'/himp/related_user_info!getTheDataProvidedToComboboxAjax.action',//'/financeStaff.do?method=dictData', // root:'model', idProperty: 'itemid', fields:[{ name:'returnValue', mapping:'itemid' },{ name:'displayText', mapping:'itemname' }] });
在这个时候需要你手动指定idProperty如果你不指定默认为id,id值一样当然会在循环的过程中一直被覆盖值,直到最后看见的是该id的最后一项的值,改正后的效果.

问题解决后效果图:

combobox代码:

//性别类型 var sexCode_para = new Ext.form.ComboBox({//对应类别的下拉框 id: 'sexCode_para', name:'sexCode_para', store: sexStore_para, width:60, mode: 'local', triggerAction: 'all', valueField: 'returnValue', displayField: 'displayText', editable:false });