实现treegrid组件的(CRUD)读取、新增、修改、删除//设置grid单元格处于编辑状态selcell:function(arow,acol){this.editingPlugin.startEditByPosition({row:arow,column:acol});},selcell2:function(node,acol){this.editingPlugin.startEdit(node,acol);}//将grid更新为已保存状态(客户端)commit:function(records){Ext.Array.each(records,function(record){record.updateInfo();