Restoring treelist expanded state after refresh

[Keijo]

Is it possible to restore tree to the same opened state after page update with remote binding.

[Keijo]

This question was ment to be posted on: http://www.telerik.com/forums/aspnet-mvc/treelist forums. 

[Viktor Tachev]

Hello Keijo,

In order to implement the behavior you can use an approach similar to the one described in the thread below. 

• http://www.telerik.com/forums/how-to-save-the-expanded-state-of-kendo-treelist

The difference in your case would be that you should expand the items and not collapse them. The modified code for persisting the expanded items would look like below:

$("#save").click(function () {
    localStorage["toExpand"] = JSON.stringify($.map($("#treelist .k-i-collapse").closest("tr"), function (val, idx) { return $(val).index() }));
});

$("#load").click(function () {
    var items = localStorage["toExpand"];
    if (items) {
        items = JSON.parse(items);
        var tl = $("#treelist").data("kendoTreeList");
        $.each(items, function (idx, val) {
            var tr = tl.content.find("tr").eq(val);
            tl.expand(tr);
        })
    }
});

Regards,
Viktor Tachev
Progress Telerik