extjs 简单问题?请帮忙回答

[Jamy325]

Ext.GoupManage=Ext.extend(Ext.Window ,{
xtype:"window",
	title:"分组管理",
	width:356,
	height:296,
	layout:"form",
	plain:true,
	animCollapse:true,
	initComponent: function(){
		this.fbar=[
			"->",
			{
				xtype:"textfield",
				fieldLabel:"Label",
				id:"txt_add"
			},
			{	
				text:"添加",
				id:"btnAdd"
			},
			{
				
				text:"关闭",
				id:"btnClose"
			}
		]
		this.items=[
			{
				xtype:"grid",
				title:"已经存在的分类",
				store:{
					xtype:"jsonstore",
					autoLoad:true,
					storeId:"MyStore",
					url:"/blog/ext_new_group",
					sortDir:"ASC",
					sortField:"name",
					root:"Group",//数组对象
					totalProperty:"Total",//数组总数
					fields:[
						{
							name:"name",
							type:"string",
							mapping:"name"
						},
						{
							name:"created_at",
							type:"string",
							mapping:"created_at"
						}
						]
				},
				height:220,
				columns:[
					{
						header:"分组名称",
						sortable:true,
						resizable:true,
						dataIndex:"name",
						width:100
					},
					{
						header:"创建日期",
						sortable:true,
						resizable:true,
						dataIndex:"created_at",
						width:200
					}
				]
			}
		]
		Ext.GoupManage.superclass.initComponent.call(this);
	}
})

这样的一段extjs程序,我想在grid中双击某条记录产生一个双击事件以实现删除该记录怎么实现.
载入数据以后我想刷新store中的数据.应该怎么访问.

[hookee]

gridpanel中配置：
listeners:{rowdblclick:function()
var store = grid.getStore(); // grid是gridpanel
var record = grid.getSelectionModel().getSelected();
store.remove(record);
},


刷新store用
store.baseParams = {key:value,key:value}// key:value是新的url get参数
store.reload()

[Jamy325]

刷新的时候如何引用store.
因为store是在Ext.GoupManage中的.找不到引用.怎么操作他.
第一问题已经解决了.