Select all / Unselect all in Bootstrap Select plugin

问题

<select id="divRatings" class="selectpicker" multiple title='Choose one of the following...' data-size="5" data-selected-text-format="count>2">
                <option value="All" selected="selected">All Ratings</option>
                <option value="EC">EC (Early Childhood)</option>
                <option value="E">E (Everyone)</option>
                <option value="E10+">E10+ (Everyone 10+)</option>
                <option value="T">T (Teen)</option>
                <option value="M">M (Mature)</option>
                <option value="AO">AO (Adults Only)</option>
            </select>

In html above there are option with value All. I want to select all items if that option is selected and unselect all if i unselect this option.

I think it will be simple to do, but i can't get why nothing happens on $('#divRatings').change(function(){//some logic});

My function to select/ unselect items:

  function toggleSelectAll(control) {
    if (control.val().indexOf("All,") > -1) {
        control.selectpicker('selectAll');
    } else {
        control.selectpicker('deselectAll');
    }
}

JSFiddle example

回答1:

Problem with your javascript is that anytime user clicks any option you check, if "All ratings" option is still checked - you check all other options too (even if you just unchecked any option). And if "All ratings" is unchecked, you uncheck all other options. So, in fact only "All ratings" option is clickable. If you click any other option, it's immediatelly checked/unchecked in your onchange handler.

Try this code:

function toggleSelectAll(control) {
    var allOptionIsSelected = (control.val() || []).indexOf("All") > -1;
    function valuesOf(elements) {
        return $.map(elements, function(element) {
            return element.value;
        });
    }

    if (control.data('allOptionIsSelected') != allOptionIsSelected) {
        // User clicked 'All' option
        if (allOptionIsSelected) {
            // Can't use .selectpicker('selectAll') because multiple "change" events will be triggered
            control.selectpicker('val', valuesOf(control.find('option')));
        } else {
            control.selectpicker('val', []);
        }
    } else {
        // User clicked other option
        if (allOptionIsSelected && control.val().length != control.find('option').length) {
            // All options were selected, user deselected one option
            // => unselect 'All' option
            control.selectpicker('val', valuesOf(control.find('option:selected[value!=All]')));
            allOptionIsSelected = false;
        } else if (!allOptionIsSelected && control.val().length == control.find('option').length - 1) {
            // Not all options were selected, user selected all options except 'All' option
            // => select 'All' option too
            control.selectpicker('val', valuesOf(control.find('option')));
            allOptionIsSelected = true;
        }
    }
    control.data('allOptionIsSelected', allOptionIsSelected);
}

$('#divRatings').selectpicker().change(function(){toggleSelectAll($(this));}).trigger('change');

http://jsfiddle.net/bu5vjdk6/4/

Updated code
http://jsfiddle.net/surajkm33/tsomyckj/

回答2:

Try this select All

$('#idSelect option').attr("selected","selected");
$('#idSelect').selectpicker('refresh');

Unselect All

$('#idSelect option').attr("selected",false);
$('#idSelect').selectpicker('refresh');

for my, this worked.

回答3:

Use data-actions-box="true" attribute to get select all and deselect all option. Try this code

<select id="divRatings" class="selectpicker" multiple title='Choose one of the following...' data-size="5" data-selected-text-format="count>2" data-actions-box="true">
            <option value="All" selected="selected">All Ratings</option>
            <option value="EC">EC (Early Childhood)</option>
            <option value="E">E (Everyone)</option>
            <option value="E10+">E10+ (Everyone 10+)</option>
            <option value="T">T (Teen)</option>
            <option value="M">M (Mature)</option>
            <option value="AO">AO (Adults Only)</option>
        </select>

Please visit [https://silviomoreto.github.io/bootstrap-select/options/][1]

[1]: https://silviomoreto.github.io/bootstrap-select/options/ To Know more

Hope this help...

回答4:

$('.selectpicker option[value=All]').click(function(){
    $('.selectpicker option').each(function(){
        this.selected = $('.selectpicker option[value=All]').attr('selected');
    });
});

回答5:

You can use my functions :

first change your code

<option value="All" selected="selected">All Ratings</option>

to

<option value="All" id="target" selected="selected">All Ratings</option>

and second add between your <script> tags

$( "#target" ).toggle(function() {
  selectAll($( "#divRatings" ))
}, function() {
  selectClear($( "#divRatings" ))
});

function selectAll(element){//Select All Function
    element.prop('selected', true);
    element.selectpicker('refresh');
}
function selectClear(element){//Clear All Function
    element.prop('selected', false);
    element.selectpicker('refresh');
}

回答6:

I came accross this question while seeking for a quick solution to toggle on/off all option in a selectpicker <select> and I ended up drafting my own, one-liner style, that works for both on and off states:

So for a given select#my-select:

HTML

<div>
    <input type="checkbox" id="select_all" data-id-select="my-select">
    <label for="select_all">Toggle all</label>
</div>

JS/jQuery

$('#select_all').on('click', function() {
    $('#' + $(this).data('id-select')).find('option').prop('selected', $(this).is(':checked')).parent('select').selectpicker('refresh');
});

回答7:

I started with @glyuck answer but changed it a little bit. I didn't want the 'All' item to be selected and then have the bootstrap-select show 'N items selected' in which one of them was the 'All' item. So basically, for me, that item will 'never select', it is more or less just a 'button' to toggle the states.

My markup would look like this:

<select size="4" multiple="multiple" class="form-control selectpicker show-tick select-all" data-selected-text-format="count > 2">
    <option value="[all]" class="select-all">All Items</option>
    <option value="" data-divider="true"></option>
    <option value="0">Members Selected</option>
    <option value="1">Separated Members Selected</option>
    <option value="2">Request Approval</option>
    <option value="3">Approved</option>
    <option value="4">Rejected</option>
</select>

Then the code to make it work the way I wanted was:

$('.selectpicker.select-all').on('change', function () {
    var selectPicker = $(this);
    var selectAllOption = selectPicker.find('option.select-all');
    var checkedAll = selectAllOption.prop('selected');
    var optionValues = selectPicker.find('option[value!="[all]"][data-divider!="true"]');

    if (checkedAll) {
        // Process 'all/none' checking
        var allChecked = selectAllOption.data("all") || false;

        if (!allChecked) {
            optionValues.prop('selected', true).parent().selectpicker('refresh');
            selectAllOption.data("all", true);
        }
        else {
            optionValues.prop('selected', false).parent().selectpicker('refresh');
            selectAllOption.data("all", false);
        }

        selectAllOption.prop('selected', false).parent().selectpicker('refresh');
    }
    else {
        // Clicked another item, determine if all selected
        var allSelected = optionValues.filter(":selected").length == optionValues.length;
        selectAllOption.data("all", allSelected);
    }
}).trigger('change');

Thanks @glyuck for the inspiration.

Fiddle: http://jsfiddle.net/3Lr4jsz0/

来源：https://stackoverflow.com/questions/28111340/select-all-unselect-all-in-bootstrap-select-plugin