问使用引用获取表单文件

EN

this.stdForm  = new Ext.form.Panel(this.createStdForm());
this.stdForm.getForm().load({
     params: { action: 'load', id: 1234, dep: 'std' },
     success: this.formLoaded,
     scope: this
});

createStdForm: function () {    
    var flds = {
       items: [
           { fieldLabel: 'Roll Number', name: 'ROLL_NUMBER', xtype: 'displayfield' } }
       ]
    };

    var fldSet = {
       title: 'Student Information',
       xtype: 'panel',
       defaultType: 'fieldset',
       defaults: { autoHeight: true, baseCls: 'x-fieldset-noborder', reference:'RollNumber'},
       items: [flds]
    };

    return {
        layout: 'column',          
        border: false,
        defaults: {                           
           border: false
        },                        
        url: this.getUrl(),
        items: [
           col1
        ]
     };    
}

formLoaded:function (form, action) {
  form.getreferences('RollNumber') // not working
  form.lookupreference(); // not working
}