Ext.form.ComboBox and loadRecord

ExtJs修改窗口combobox数据绑定及初始化
在Window 中侦听show
listeners:{
   "show":function()
       {
        EditUserInfoForm.getForm().loadRecord(row);
       }
     }    
窗体加载后ComboBox的值并不能被正确赋值，如下：

可能是ComboBox数据加载在后，loadRecord赋值在前，导致赋值失败，那么侦听下ComboBox数据的加载load事件看看可行，在它的load事件里加上 EditUserInfoForm.getForm().loadRecord(row); 呵呵，果然可以。是一个绑定顺序出了问题。ok.那么在ComboBox的数据加载的load事件里为其赋值typeCombo.setValue(1) 可以吗？测试了下，不行，原因不明。
http://extjs.com/forum/showthread.php?t=42699

items还不能有id属性，有的话，comboobx可能显示不出来，或combobox不能显示对应选择的display值。
1.combobox不能显示对应选择的display值

2.comboobx显示不出来


3.在cmb数据加载是窗体初始化，同时去掉combobox的id属性后即可


部分代码如下：

  var  EditUserRoleFields  =  Ext.data.Record.create([      
        {name:  ' roleid ' ,mapping: ' roleid ' },{name:  ' rolename ' ,mapping: ' rolename ' },{name: ' roledesc ' ,mapping: ' roledesc ' }                     
    ]);    
    
    var   EditUserRoleStore  =   new  Ext.data.Store({      
        proxy:  new  Ext.data.HttpProxy({      
            url: ' DATA/RoleInfo/GetRoleInfo.aspx '   
        }),      
        reader:  new  Ext.data.JsonReader({      
            root:  ' data ' ,      
            id:  ' roleid '      
        },
        EditUserRoleFields 
        )      
    });
    EditUserRoleStore.on( ' load ' ,
                              function ()
                             {                             
                                 EditUserInfoForm.getForm().loadRecord(row); 
                             } 
                          )  
    EditUserRoleStore.load();
    

  var  EditUserInfoForm = new  Ext.form.FormPanel({
            width: 315 ,
            height: 270 ,
            plain: true ,
            layout: " form " ,
            defaultType: " textfield " ,
            labelWidth: 45 ,
            baseCls: " x-plain " ,
            defaults:{anchor: " 95% " ,msgTarget: " side " },
            buttonAlign: " center " ,
            bodyStyle: " padding:0 0 0 0 " ,
            items:[   
            {
                    name: " userid " ,
                    fieldLabel: " 帐号 " ,
                    allowBlank: false ,
                    blankText: " 帐号不允许为空 "
            },{
                    name: " userpwd " ,
                    fieldLabel: " 密码 " ,
                    allowBlank: false ,
                    blankText: " 密码不能为空 " ,
                    inputType: " password "
            },{
                    name: " username " ,
                    fieldLabel: " 称谓 " ,
                    allowBlank: false ,
                    blankText: " 称呼不能为空 " ,
                    regex: / ^[\s\S]{1,10}$ / ,
                    regexText: " 昵称请不要超过10个字符 "
            },{     
                    
                    name: " userstate " ,
                    xtype: " combo " ,
                    fieldLabel: " 状态 " ,
                    editable:  false ,
                    typeAhead:  true ,
                     // 传入后台真实值value field /value
                    hiddenName: " userstate " ,
                    mode: " local " ,
                    displayField: " show " ,
                    valueField: " value " ,
                    triggerAction: " all " ,
                    value: " 0 " ,
                    store: new  Ext.data.SimpleStore({
                        fields:[ " show " , " value " ],
                        data:[[ " 正常 " , " 0 " ],[ " 禁用 " , " 1 " ]]
                    })
            },{               
                    xtype: " combo " ,
                    tpl:  ' <tpl for="."><div ext:qtip="{rolename}. {roledesc}" class="x-combo-list-item">{rolename}</div></tpl> ' ,
                    store: EditUserRoleStore,
                    typeAhead:  true ,
                    fieldLabel: ' 角色 ' ,
                    hiddenName: ' roleid ' ,
                    name: ' roleid ' ,
                    //  id:'roleid',
                    forceSelection:  true ,
                    triggerAction:  ' all ' ,
                    emptyText: ' 选择角色类型 ' ,
                    selectOnFocus: true ,
                    width: 130 ,
                    editable:  false , 
                    allowBlank: false , 
                    blankText: ' 请选择角色类型 ' , 
                    displayField: ' rolename ' ,
                    valueField:  ' roleid ' ,
                    mode:  ' remote '                    
            }            
            ]});