Filter the MultiSelect DataSource Manually

Environment

Product	Progress Kendo UI MultiSelect for jQuery
Operating System	Windows 10 64bit
Visual Studio version	Visual Studio 2017
Preferred Language	JavaScript

Description

How can I manually filter the dataSource instance of the MultiSelect?

Solution

The Kendo UI MultiSelect has a built-in detection mechanism that checks whether the data is filtered or not. The widget uses this information to decide when to persist the selected value that does not exist in the source. When the source is manually filtered, the widget loses the details about the state of the DataSource, which might lead to inconsistent behavior.

The following example demonstrates how to achieve the desired scenario.

<div id="example">
    <div class="demo-section k-header">
        <h4>MultiSelect</h4>
        <select id="multiselect" multiple="multiple"></select>
    </div>
    <script>
        $(function() {
            var ms = $("#multiselect").kendoMultiSelect({
                dataTextField: "name",
                dataValueField: "value",
                dataSource: {
                    data: [{ name: "One", value: 1 }, { name: "Two", value: 2 }]
                }
            }).data('kendoMultiSelect');

            //Filter the source manually
            ms.dataSource.filter({
                field: 'value',
                operator: 'eq',
                value: 1
            });

            <!-- IMPORTANT: Update filter state of the widget -->
            ms.listView.setDSFilter(ms.dataSource.filter());

            ms.value(1);
        });
    </script>
</div>

See Also

• MultiSelect JavaScript API Reference
• How to Cascade from DropDownList
• How to Filter Values in Widgets Sharing the Same Data
• How to Preselect Items Using MVVM Binding
• How to Select All Values with Single Selection
• How to Use MultiSelect with Bootstrap Modal Window
• How to Wire Blur Event of the Filter Input