TypeError: record.get is not a function

错误信息为：TypeError: record.get is not a function
custCardCode.setValue(record.get('custCardCode'));

items : [{
xtype : 'button',
text : '确定',
listeners : {
'click':function(){
var grid = Ext.getCmp('custCardCode-grid');
var record = grid.getSelectionModel().getSelection();
if(record.length == 0){
Ext.Msg.alert('提示', '请选择一条记录！');
return;
}
var custCardCode = Ext.getCmp(me.custCardCodeId);
if(custCardCode){
custCardCode.setValue(record.get('custCardCode'));  //提示错误处
//解决方法  custCardCode.setValue(record[0].get('custCardCode'));
}
me.close();
}
}
}]