ExtJS中Store数据变化后刷新功能

/*删除操作*/
	rmvItem : function(grid, rowIndex, colIndex) {
		Ext.MessageBox
				.confirm("提示","确认要删除该代理吗？",
						function(id) {
							if (id == "yes") {
								var r = this.getStore().getAt(
										rowIndex);
								 /*remove请求*/
								var req = {
									url : IsmpYH.req.SITE_RMV,
									params : {
										timestamp : new Date().valueOf(),
										site_id : r.data.site_id,
										method:‘delete‘
									},
									scope : this,
									callback : function(o) {
										if (o.success) {
											Ext.MessageBox
													.alert(
															‘提示‘,
															‘删除成功‘,
															function() {
																this.getStore().remove(r);
																Ext.StoreMgr.get(‘situs‘).reload();
															},
															this);
										} else {
											var msg = o.message;
											if (msg === null) {
												msg = ‘对不起，处理失败！请稍后重试。‘;
											}
											Ext.MessageBox
													.alert(‘提示‘,msg);
										}
									}
								};
								IsmpYH.Ajax.send(req);
							}
						}, this);
	},

Ext.StoreMgr.get(‘situs‘).reload();