Property null not found
![[java] javax.el.PropertyNotFoundException: Property 'id' not found on type bean.Student](http://img.it610.com/image/info5/7e0c328a238d45d6bfa17e93fadfd8fe.jpg@!118x99b)
摘要: When you got error message like "Property null not found ***", try to fix it by the following way:
1)if you are using AdvancedDatagrid, make sure you only update the data in the data prov
When you got error message like "Property null not found ***", try to fix it by the following way:
1)if you are using AdvancedDatagrid, make sure you only update the data in the data provider instead of setting a new reference to data provider each time.
right way:
(dgPortfolioViewer.dataProvider as ArrayCollection).removeAll();
(dgPortfolioViewer.dataProvider as ArrayCollection).addAll(value);
wrong way:
dgPortfolioViewer.dataProvider=oldData;
dgPortfolioViewer.dataProvider=newData;
2) make sure the propery name in datafield is existed in your object
1)if you are using AdvancedDatagrid, make sure you only update the data in the data provider instead of setting a new reference to data provider each time.
right way:
(dgPortfolioViewer.dataProvider as ArrayCollection).removeAll();
(dgPortfolioViewer.dataProvider as ArrayCollection).addAll(value);
wrong way:
dgPortfolioViewer.dataProvider=oldData;
dgPortfolioViewer.dataProvider=newData;
2) make sure the propery name in datafield is existed in your object
-
0票
开心
-
0票
板砖
-
0票
感动
-
0票
有用
-
0票
疑问
-
0票
难过
-
0票
无聊
-
0票
震惊
顶
踩
推荐文章
编辑推荐
问题提出： 在使用MyEclipse开发Java Web时，调用DAO和Java Bean出现了如下错误： 严重: Servlet.se
异常： 我的查询方法： 对应的vo类[img] 数据库 解决bug:查出的数据supervisionState是null，查询结
org.hibernate.PropertyValueException: not-null property references a null or transient value a
现象: Data Tables在IE上使用时报异常Error Unable to get value of the property 'style' object i
问题描述： 如图所示： 当我在第2页编辑学号为11的学生后，修改学生的信息，然后保存。处理过程如下
先来一个例子： view的 invalidate 和 requestLayout方法是不一样的， invalidate ValueAnimator va
原文： http://blog.csdn.net/jackiezhw/archive/2007/05/30/1631846.aspx 在使用RMI编程的时候，有
file:///Users/baidu/android-sdk/docs/guide/topics/graphics/index.html Animation and Graphics
http://www.360doc.com/content/10/0329/09/1014216_20687179.shtml 大家应该都知道@代表“Objectiv
3.0以前，android支持两种动画模式，tween animation,frame animation，在android3.0中又引入了一个