treegrid 折叠全部节点

$(".easyui-treegrid").treegrid({
url: '@Url.Action("GetDataDictionaryList", "DataDictionary")',
onLoadSuccess: function (row, data) {
$.each(data, function (i, val) { $('.easyui-treegrid').treegrid('collapseAll', data[i].id); });
}
});