Ext grid 如果在前台修改字段并显示

我的Grid 是没有分页的,左右数据在一页里显示。
我想改变grid里面某一行的值,并且实时显示,请文该怎么做
例如:
Ext.onReady(function(){

// NOTE: This is an example showing simple state management. During development,
// it is generally best to disable state management as dynamically-generated ids
// can change across page loads, leading to unpredictable results.  The developer
// should ensure that stable state ids are set for stateful components in real apps.    
Ext.state.Manager.setProvider(new Ext.state.CookieProvider());

var myData = [
    ['3m Co',71.72,0.02,0.03,'9/1 12:00am'],
    ['Alcoa Inc',29.01,0.42,1.47,'9/1 12:00am'],
    ['Altria Group Inc',83.81,0.28,0.34,'9/1 12:00am'],
    ['American Express Company',52.55,0.01,0.02,'9/1 12:00am'],
    ['American International Group, Inc.',64.13,0.31,0.49,'9/1 12:00am'],
    ['AT&T Inc.',31.61,-0.48,-1.54,'9/1 12:00am'],
    ['Boeing Co.',75.43,0.53,0.71,'9/1 12:00am'],
    ['Caterpillar Inc.',67.27,0.92,1.39,'9/1 12:00am'],
    ['Citigroup, Inc.',49.37,0.02,0.04,'9/1 12:00am'],
    ['E.I. du Pont de Nemours and Company',40.48,0.51,1.28,'9/1 12:00am'],
    ['Exxon Mobil Corp',68.1,-0.43,-0.64,'9/1 12:00am'],
    ['General Electric Company',34.14,-0.08,-0.23,'9/1 12:00am'],
    ['General Motors Corporation',30.27,1.09,3.74,'9/1 12:00am'],
    ['Hewlett-Packard Co.',36.53,-0.03,-0.08,'9/1 12:00am'],
    ['Honeywell Intl Inc',38.77,0.05,0.13,'9/1 12:00am'],
    ['Intel Corporation',19.88,0.31,1.58,'9/1 12:00am'],
    ['International Business Machines',81.41,0.44,0.54,'9/1 12:00am'],
    ['Johnson & Johnson',64.72,0.06,0.09,'9/1 12:00am'],
    ['JP Morgan & Chase & Co',45.73,0.07,0.15,'9/1 12:00am'],
    ['McDonald\'s Corporation',36.76,0.86,2.40,'9/1 12:00am'],
    ['Merck & Co., Inc.',40.96,0.41,1.01,'9/1 12:00am'],
    ['Microsoft Corporation',25.84,0.14,0.54,'9/1 12:00am'],
    ['Pfizer Inc',27.96,0.4,1.45,'9/1 12:00am'],
    ['The Coca-Cola Company',45.07,0.26,0.58,'9/1 12:00am'],
    ['The Home Depot, Inc.',34.64,0.35,1.02,'9/1 12:00am'],
    ['The Procter & Gamble Company',61.91,0.01,0.02,'9/1 12:00am'],
    ['United Technologies Corporation',63.26,0.55,0.88,'9/1 12:00am'],
    ['Verizon Communications',35.57,0.39,1.11,'9/1 12:00am'],            
    ['Wal-Mart Stores, Inc.',45.45,0.73,1.63,'9/1 12:00am']
];

// example of custom renderer function
function change(val){
    if(val > 0){
        return '<span style="color:green;">' + val + '</span>';
    }else if(val < 0){
        return '<span style="color:red;">' + val + '</span>';
    }
    return val;
}

// example of custom renderer function
function pctChange(val){
    if(val > 0){
        return '<span style="color:green;">' + val + '%</span>';
    }else if(val < 0){
        return '<span style="color:red;">' + val + '%</span>';
    }
    return val;
}

// create the data store
var store = new Ext.data.ArrayStore({
    fields: [
       {name: 'company'},
       {name: 'price', type: 'float'},
       {name: 'change', type: 'float'},
       {name: 'pctChange', type: 'float'},
       {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
    ]
});
store.loadData(myData);

// create the Grid
var grid = new Ext.grid.GridPanel({
    store: store,
    columns: [
        {id:'company',header: "Company", width: 160, sortable: true, dataIndex: 'company'},
        {header: "Price", width: 75, sortable: true, renderer: 'usMoney', dataIndex: 'price'},
        {header: "Change", width: 75, sortable: true, renderer: change, dataIndex: 'change'},
        {header: "% Change", width: 75, sortable: true, renderer: pctChange, dataIndex: 'pctChange'},
        {header: "Last Updated", width: 85, sortable: true, renderer: Ext.util.Format.dateRenderer('m/d/Y'), dataIndex: 'lastChange'}
    ],
    stripeRows: true,
    autoExpandColumn: 'company',
    height:350,
    width:600,
    title:'Array Grid'
});
grid.render('grid-example');

});

我想修改 里面某列的值 请问怎么修改

3个回答

[code="js"]
//i为行号
grid.store.getAt(i).set('company','华为')
[/code]

其实你可以使用可编辑的Grid组件。
官方里面已经有例子:
列编辑:[url]http://www.extjs.com/deploy/dev/examples/grid/edit-grid.html[/url]
整行编辑:[url]http://www.extjs.com/deploy/dev/examples/grid/row-editor.html[/url]

例子
{id:'company',
header: "Company",
width: 160,
sortable: true,
dataIndex: 'company',
renderer:function(v){
return "华为";

}
  } 

加个 renderer就行了

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