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MultiSelect JSP Tag Overview

The MultiSelect JSP tag is a server-side wrapper for the Kendo UI MultiSelect widget.

Getting Started

The Basics

There are two ways to bind a Kendo UI MultiSelect:

  • server—The data is serialized to the client. No Ajax requests are going to be made.
  • ajax—The MultiSelect is going to make Ajax requests to get the data. For more information on this type of binding, refer to the MultiSelect API reference article on Ajax binding.

Configuration

Below are listed the steps for you to follow when configuring the Kendo UI MultiSelect for binding to data, passed as a model attribute in Spring MVC.

Step 1 Make sure you have followed all the steps from the Introduction help topic.

Step 2 Create a new action method and pass the Products table to the View.

Example
    @RequestMapping(value = {"index"}, method = RequestMethod.GET)
    public String index(Model model) {
        model.addAttribute("products", product.getList());

        return "web/multiselect/index";
    }

Step 3 Add the Kendo UI taglib mapping to the page.

Example
    <%@taglib prefix="kendo" uri="http://www.kendoui.com/jsp/tags"%>

Step 4 Add a server-bound MultiSelect.

Example
    @RequestMapping(value = {"index"}, method = RequestMethod.GET)
    public String index(Model model) {
        model.addAttribute("products", product.getList());
        return "web/multiselect/index";
    }

    <kendo:multiSelect name="productMultiSelect" dataTextField="productName" dataValueField="productId" filter="startswith">
        <kendo:dataSource data="${products}"></kendo:dataSource>
    </kendo:multiSelect>

Pre-Selection of Values on Initial Loading

When deferred binding (autoBind="false") is used, you need to specify a list of data items instead of just a list of strings. This functionality is supported in the Kendo UI Q1 2013 SP1 release and later versions of Kendo UI.

Example
    @RequestMapping(value = {"index"}, method = RequestMethod.GET)
    public String index(Model model) {
        model.addAttribute("products", product.getList());

        Product product1 = new Product();
        product1.setProductId(1);
        product1.setProductName("Chai");

        List<Product> values = new ArrayList<>();
        values.add(product1);

        model.addAttribute("values", values);

        return "web/multiselect/index";
    }

<kendo:multiSelect name="productMultiSelect" taTextField="productName" dataValueField="productId" filter="startswith"
    autoBind="false" value="${values}">
    <kendo:dataSource data="${products}"></kendo:dataSource>
</kendo:multiSelect>

Event Handling

Subscribe to Events

You can subscribe to all events exposed by Kendo UI MultiSelect by the handler name.

Example
<kendo:multiSelect name="productMultiSelect" dataTextField="productName" dataValueField="productId" change="multiselect_change">
    <kendo:dataSource data="${products}">
    </kendo:dataSource>
</kendo:multiSelect>

<script>
    function multiselect_change() {
        //Handle the change event
    }
</script>

Reference

Existing Instances

You are able to reference an existing MultiSelect instance via the jQuery.data(). Once a reference is established, you are able to use the MultiSelect API to control its behavior.

Example
//Put this after your Kendo MultiSelect tag declaration
<script>
$(function() {
    // Notice that the Name() of the multiselect is used to get its client-side instance
    var multiSelect = $("#productMultiSelect").data("kendoMultiSelect");
});
</script>

See Also

Other articles on Telerik UI for JSP and on the MultiSelect:

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