ext 页面自动刷新3

是这样的？？我有个不段变化的数据源。。想grid显示的随数据源不段变化。可是为什么grid显示就是不变啊。。grid里面的store是不段变的，，真晕啊，，那位大大帮忙看看啊 
Java代码 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="HFC2.aspx.cs" Inherits="pro_HFC2" %>   
  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"    
  
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">   
  
<html xmlns="http://www.w3.org/1999/xhtml" >   
<head runat="server">   
    <title>无标题页</title>   
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">   
    <link href="../js/ext-all.css" rel="stylesheet" type="text/css" />   
    <script src="../js/ext-base.js"></script>   
    <script src="../js/ext-all.js"></script>   
    <script type="text/javascript" src="../js/ext-lang-zh_CN.js"></script>   
    <script type="text/javascript" src="../js/Portal.js"></script>   
    <script type="text/javascript" src="../js/PortalColumn.js"></script>   
    <script type="text/javascript" src="../js/Portlet.js"></script>   
    <link href="../js/portal.css" rel="stylesheet" type="text/css" />   
    <script type="text/javascript">Ext.BLANK_IMAGE_URL = '../images/default/s.gif';</script>          
  
    
</head>   
<script>   
     Ext.onReady(function(){   
        
var task={run:function(){   
     Ext.Ajax.request({   
          url:'../pro/HFC2.aspx?cmd=grid',   
                     success:function(response){    
                    var data=Ext.decode(response.responseText);   
//因为有几个grid，所以打算1次取到所有数据，再分个要的grid   
                    var store = new Ext.data.SimpleStore({   
                        fields:  [   
                            {name: 'oid'},   
                            {name: 'value'}   
                        ]   
                    });   
  
  
                     var cm=new Ext.grid.ColumnModel([   
                             {header:'名称',dataIndex:"oid",width:152, align:'center'},   
                             {header:'参数',dataIndex:"value",width:150, align:'center'}   
                            ]);   
                        var grid = new Ext.grid.GridPanel({   
                            width:325,   
                            height:300,   
                           stripeRows: true,   
                           autoScroll:true,    
                           cm:cm,   
                          // renderTo:'grid',   
                           store:store   
                        });    
                        
                        if(document.getElementById("grid").innerHTML=="")   
                        {   
                            grid.render("grid");   
                        }   
                        //store.removeAll();   
                        //grid.render("grid");   
                        grid.store.loadData(data);//store里面的数据是变的。但为什么显示不变啊？？   
  
？？   
                           
                        //alert(store.getAt(1).get('value')  )   
                        //grid.store.reload();   
                      // grid.reconfigure(store,cm);   
                    },   
                    failure:function(){}           
     });   
  
     }, interval:3000};   
        var taskRunner=new Ext.util.TaskRunner();   
        taskRunner.start(task);   
var viewport = new Ext.Viewport({   
        border :false,   
       autoScroll:true,    
        region:'nori',   
        items:[   
        {   
            xtype:'portal',   
            margins:'5 0 5 0',   
            items:[{   
                columnWidth:.33,   
                style:'padding:3px 0 3px 3px',   
                items:[{   
                    title: 'aa',   
                    html: "<div id='main' style:'height:500px'>d</div>"  
                }]   
            },{   
                columnWidth:.33,   
                   
                style:'padding:3px 0 3px 3px',   
                items:[{   
                    title: '基本属性',   
//                    items:[grid]   
                     html:"<div id='grid'></div>"  
                }]   
            },{   
                columnWidth:.33,   
                style:'padding:3px 0 3px 3px',   
                items:[{   
                    title: '统计信息',   
                    html: "dadad"  
                },{   
                    title: 'Another Panel 3',   
                    html: "dadad"  
                }]   
                }   
             ]   
        },{title:'da',html:'ddaa',height:100}   
        ]   
    });   
        
        
     });      
</script>   
<body>   
    <div id="nori"></div>   
      
</body>   
</html>  <%@ Page Language="C#" AutoEventWireup="true" CodeFile="HFC2.aspx.cs" Inherits="pro_HFC2" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <link href="../js/ext-all.css" rel="stylesheet" type="text/css" />
    <script src="../js/ext-base.js"></script>
    <script src="../js/ext-all.js"></script>
    <script type="text/javascript" src="../js/ext-lang-zh_CN.js"></script>
    <script type="text/javascript" src="../js/Portal.js"></script>
    <script type="text/javascript" src="../js/PortalColumn.js"></script>
    <script type="text/javascript" src="../js/Portlet.js"></script>
    <link href="../js/portal.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript">Ext.BLANK_IMAGE_URL = '../images/default/s.gif';</script>        
</head>
<script>
     Ext.onReady(function(){
     
var task={run:function(){
     Ext.Ajax.request({
          url:'../pro/HFC2.aspx?cmd=grid',
                     success:function(response){ 
                    var data=Ext.decode(response.responseText);
//因为有几个grid，所以打算1次取到所有数据，再分个要的grid
                    var store = new Ext.data.SimpleStore({
                        fields:  [
                            {name: 'oid'},
                            {name: 'value'}
                        ]
                    });
                     var cm=new Ext.grid.ColumnModel([
                             {header:'名称',dataIndex:"oid",width:152, align:'center'},
                             {header:'参数',dataIndex:"value",width:150, align:'center'}
                            ]);
                        var grid = new Ext.grid.GridPanel({
                            width:325,
                            height:300,
                           stripeRows: true,
                           autoScroll:true, 
                           cm:cm,
                          // renderTo:'grid',
                           store:store
                        }); 
                     
                        if(document.getElementById("grid").innerHTML=="")
                        {
                            grid.render("grid");
                        }
                        //store.removeAll();
                        //grid.render("grid");
                        grid.store.loadData(data);//store里面的数据是变的。但为什么显示不变啊？？？？
                        
                        //alert(store.getAt(1).get('value')  )
                        //grid.store.reload();
                      // grid.reconfigure(store,cm);
                    },
                    failure:function(){}        
     });     }, interval:3000};
        var taskRunner=new Ext.util.TaskRunner();
        taskRunner.start(task);
var viewport = new Ext.Viewport({
        border :false,
       autoScroll:true, 
        region:'nori',
        items:[
        {
            xtype:'portal',
            margins:'5 0 5 0',
            items:[{
                columnWidth:.33,
                style:'padding:3px 0 3px 3px',
                items:[{
                    title: 'aa',
                    html: "<div id='main' style:'height:500px'>d</div>"
                }]
            },{
                columnWidth:.33,
                
                style:'padding:3px 0 3px 3px',
                items:[{
                    title: '基本属性',
//                    items:[grid]
                     html:"<div id='grid'></div>"
                }]
            },{
                columnWidth:.33,
                style:'padding:3px 0 3px 3px',
                items:[{
                    title: '统计信息',
                    html: "dadad"
                },{
                    title: 'Another Panel 3',
                    html: "dadad"
                }]
                }
             ]
        },{title:'da',html:'ddaa',height:100}
        ]
    });
     
     
     });   
</script>
<body>
    <div id="nori"></div>
   
</body>
</html>问题补充：
我用grid.reconfigure(store, new Ext.grid.ColumnModel(cm)); 
怎么包错啊。包错信息：this.view is null 问题补充：
自己解决了 
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该问题已经关闭: 自己解决了 
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其实很简单的,主要就是以下三项. 
//重新绑定grid 
this.grid.reconfigure(newStore, new Ext.grid.ColumnModel(cm1)); 
//重新绑定分页工具栏 
this.pagingBar.bind(newStore); 
//重新加载数据集 
newStore.load({params:{start:0,limit:10}}); lovewhzlq (CTO) 2009-06-23 
设置一个定时器进行轮询，每隔多少秒调用一次加载store的url，然后重新load
laitaogood (资深程序员) 2009-06-23 
lovewhzlq 正解

解决方案 »

  1.   

    Extjs 局部定时刷新
     悬赏分：50 - 解决时间：2010-6-15 14:55 
    求一个简单完整的例子，能够实现Extjs 页面中某个容器里面的一个子容器的定时自动刷新。例如，定时select 数据库中的内容，并显示在子容器中，页面不能闪 
    完整的例子懒得写了。
    其实很简单，如果是 GridPanel，只要定时刷新他的 store 即可。setInterval(function() {
       dataStore.reload();  // dataStore 换成你的 store 的变量名
    }, 1000);  //每隔 1 秒  0