Clear and refresh jQuery Chosen dropdown list

Question

I'm trying to clear jQuery Chosen dropdown list and refresh it.

HTML:

<select data-placeholder="Select Picture..." class="chosen-select" style="width:250px;" id="picturegallery" tabindex="2">
    <option value="" selected="selected"></option>
    <option value="x">remove me</option>
</select>

When I click "Refresh" button, it should turn into this:

<select data-placeholder="Select Picture..." class="chosen-select" style="width:250px;" id="picturegallery" tabindex="2">
    <option value="1">test</option>
</select>

What I have tried:

$("#refreshgallery").click(function(){
    $('#picturegallery').empty();
    var newOption = $('<option value="1">test</option>');
    $('#picturegallery').append(newOption);
});

But I can't get it to update that dropdown list... Some help? :)

Answer 1

Using .trigger("chosen:updated"); you can update the options list after appending.

Updating Chosen Dynamically: If you need to update the options in your select field and want Chosen to pick up the changes, you'll need to trigger the "chosen:updated" event on the field. Chosen will re-build itself based on the updated content.

Your code:

$("#refreshgallery").click(function(){
        $('#picturegallery').empty(); //remove all child nodes
        var newOption = $('<option value="1">test</option>');
        $('#picturegallery').append(newOption);
        $('#picturegallery').trigger("chosen:updated");
    });

Answer 2

If trigger("chosen:updated"); not working, use .trigger("liszt:updated"); of @Nhan Tran it is working fine.

Answer 3

$("#idofBtn").click(function(){
        $('#idofdropdown').empty(); //remove all child nodes
        var newOption = $('<option value="1">test</option>');
        $('#idofdropdown').append(newOption);
        $('#idofdropdown').trigger("chosen:updated");
    });

Answer 4

MVC 4:

    function Cargar_BS(bs) {
        $.getJSON('@Url.Action("GetBienServicio", "MonitoreoAdministracion")',
                        {
                            id: bs
                        },
                        function (d) {
                            $("#txtIdItem").empty().append('<option value="">-Seleccione-</option>');
                            $.each(d, function (idx, item) {
                                jQuery("<option/>").text(item.C_DescBs).attr("value", item.C_CodBs).appendTo("#txtIdItem");
                            })
                            $('#txtIdItem').trigger("chosen:updated");
                        });
    }