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Select or Deselect All MultiSelect Items

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 select or deselect all items in the Kendo UI MultiSelect widget by using external buttons?

Solution

The following example demonstrates how to achieve the desired scenario.

    <div id="example" role="application">
      <div class="demo-section k-header">
        <h2>Invite Attendees</h2>
        <label for="required">Required</label>
        <select id="required" multiple="multiple" data-placeholder="Select attendees...">
          <option>Steven White</option>
          <option>Nancy King</option>
          <option>Nancy Davolio</option>
          <option>Robert Davolio</option>
          <option>Michael Leverling</option>
          <option>Andrew Callahan</option>
          <option>Michael Suyama</option>
          <option selected>Anne King</option>
          <option>Laura Peacock</option>
          <option>Robert Fuller</option>
          <option>Janet White</option>
          <option>Nancy Leverling</option>
          <option>Robert Buchanan</option>
          <option>Margaret Buchanan</option>
          <option selected>Andrew Fuller</option>
          <option>Anne Davolio</option>
          <option>Andrew Suyama</option>
          <option>Nige Buchanan</option>
          <option>Laura Fuller</option>
        </select>
        <button class="k-button" id="select">Select All</button>
        <button class="k-button" id="deselect">Deselect All</button>
      </div>
      <style scoped>
        .demo-section {
          width: 350px;
          min-height: 140px;
        }
        .demo-section h2 {
          font-weight: normal;
        }
        .demo-section label {
          display: inline-block;
          margin: 15px 0 5px 0;
        }
        .demo-section select {
          width: 350px;
        }
        #get {
          float: right;
          margin: 25px auto 0;
        }
      </style>
      <script>
        $(document).ready(function() {
          // create MultiSelect from select HTML element
          var required = $("#required").kendoMultiSelect().data("kendoMultiSelect");

          $("#select").click(function() {
            var values = $.map(required.dataSource.data(), function(dataItem) {
              return dataItem.value;
            });

            required.value(values);
          });

          $("#deselect").click(function() {
            required.value([]);
          });
        });
      </script>
    </div>

See Also

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