gridpanel动态加载数据的例子

<script type='text/javascript'>

function editEsOrder(options,success,response){
if (success){
var tagModelManager_maxOrderIdJson=Ext.util.JSON.decode(response.responseText);
var orderValue = tagModelManager_maxOrderIdJson.maxOrderId ;
Ext.getCmp('esorder').setValue(orderValue) ;
}
}

var tagModelManager_toolBar=new Ext.Toolbar({
items:[
{id:'tagModel_Save',text:'添加',iconCls:'add',handler:tagModel_Save}
,'-',
{id:'tagModel_dropSelected',text:'删除',iconCls:'remove',handler:tagModel_dropSelected}
]});

new Ext.grid.GridPanel({
id:'tagModelManager_tagModelGrid',
autoScroll:true,  store:new Ext.data.Store(),
cm:new Ext.grid.ColumnModel([new Ext.grid.RowNumberer()]),
sm:new Ext.grid.CheckboxSelectionModel(),
renderTo:'tagModelManager_tagModelDiv',
        width:Ext.getCmp('TagModel_win').getSize().width-16,
        height:Ext.getCmp('TagModel_win').getSize().height-35,
hideHeaders :false,
loadMask:{msg:'正在加载数据，请稍候....'},
collapsible : true,
collapsed : false,
bbar:new Ext.PagingToolbar({
id:'tagModelManager_tagModelPagingBar',
pageSize:getComboValue(),
store:new Ext.data.Store(),
displayInfo:true
}),
tbar:tagModelManager_toolBar
});
Ext.getCmp('tagModelManager_tagModelGrid').render() ;
Ext.getCmp('tagModelManager_tagModelGrid').on('rowdblclick', tagModelSelectRowDblClickEvent);
function tagModelSelectRowDblClickEvent(selectionModel, rowIndex, selectedRecord) {
  var selectedRows = Ext.getCmp('tagModelManager_tagModelGrid').getSelectionModel().getSelections();
      var row=selectedRows[0];   
      tagModel_SaveOrEdit('edit',row);
}
function tagModel_Save() {
      tagModel_SaveOrEdit('save');
}
function tagModelList_search() {
  Ext.Ajax.request({
  url:'editTagModel.html?method=getParams',
   callback:getSearchList
   });
}
function getSearchList(options,success,response) {
if (success){
var tagModelManager_json=Ext.util.JSON.decode(response.responseText);
tagModelManager_tagModelGridTitle = tagModelManager_json.tagModelManager_tagModelGridTitle;
var record = tagModelManager_json.record ;
var tagModelManager_tagModelColumnModels = tagModelManager_json.tagModelManager_tagModelColumnModels ;
        var tagModelManager_tagModelColumnModel=new Ext.grid.ColumnModel(Ext.util.JSON.decode("["+"new Ext.grid.RowNumberer()"+","+"new Ext.grid.CheckboxSelectionModel()"+","+tagModelManager_tagModelColumnModels+"]"));
tagModelManager_tagModelColumnModel.defaultSortable=true;
var strucutreModelManager_tagModelDataStore = new Ext.data.Store({
         baseParams: { tagModelKeyword : Ext.getCmp('tagModelManager_search_button').el.dom.value.trim() },
proxy:new Ext.data.HttpProxy({
url:'editTagModel.html?method=getTagModelDataList'
}),
reader:new Ext.data.JsonReader({
totalProperty:'resultSize',root:'tagModelList'},Ext.util.JSON.decode(record))  });
Ext.getCmp('tagModelManager_tagModelPagingBar').bind(strucutreModelManager_tagModelDataStore);
strucutreModelManager_tagModelDataStore.load({params:{start:0,limit:getComboValue()}}) ;
Ext.getCmp('tagModelManager_tagModelGrid').setTitle(tagModelManager_tagMod