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Version Q1 2012 released 04/11/2012
select

ComboBox / Multi-column ComboBox

select

select

  • RadComboBox provides support for multiple columns. Developers can now define any structure and it will be applied to all combobox items. The key benefit here is that this is achieved using templates.

    The second combobox features several items in one row by using the DropDownCssClass property (multipleRowsColumns class) and the following CSS rules: 

            .multipleRowsColumns .rcbItem,
        .multipleRowsColumns .rcbHovered
        {
            float:left;
            margin:0 1px;
            min-height:13px;
            overflow:hidden;
            padding:2px 19px 2px 6px;
            width:125px;
        }

    Multi-column mode supports all advanced AJAX features of the combo - load on demand, auto-complete, etc. Items loaded on demand are automatically formatted using the ItemTemplate as well.

    In addition, you can take advantage of the HeaderTemplate and FooterTemplate to improve the usability of the drop-down list.

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page AutoEventWireup="true" CodeFile="DefaultCS.aspx.cs" Inherits="Telerik.ComboboxExamplesCS.MultiColumnCombo.DefaultCS"
        Language="c#" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="sds" Namespace="Telerik.Web.SessionDS" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
        <qsf:HeadTag runat="server" ID="Headtag1" />
        <link rel="stylesheet" href="styles.css" type="text/css" />
        <style type="text/css">
            .multipleRowsColumns .rcbItem, .multipleRowsColumns .rcbHovered
            {
                float: left;
                margin: 0 1px;
                min-height: 13px;
                overflow: hidden;
                padding: 2px 19px 2px 6px;
                width: 125px;
            }
            html.rfdButton a.rfdSkinnedButton
            {
                vertical-align: middle;
                margin: 0 0 0 5px;
            }
            label
            {
                display: inline-block;
                width: 200px;
                text-align: right;
                padding-right: 5px;
                margin-top: 10px;
            }
            * html.rfdButton a.rfdSkinnedButton,
            * html.rfdButton input.rfdDecorated
            {
                vertical-align: top;
            }
        </style>
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
        <qsf:Header runat="server" ID="Header1" NavigationLanguage="C#" XhtmlCompliant="False" />
        <telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
            <AjaxSettings>
                <telerik:AjaxSetting AjaxControlID="Button1">
                    <UpdatedControls>
                        <telerik:AjaxUpdatedControl ControlID="Label1" />
                    </UpdatedControls>
                </telerik:AjaxSetting>
            </AjaxSettings>
        </telerik:RadAjaxManager>
        <telerik:RadFormDecorator ID="FormDecorator1" runat="server" DecoratedControls="all" ControlsToSkip="Scrollbars"></telerik:RadFormDecorator>
        <!-- content start -->
    <asp:Label runat="server" ID="LabelSupervisor" AssociatedControlID="RadComboBox1"
    Text="Grid-like multi-column:" />
        <telerik:RadComboBox runat="server" ID="RadComboBox1" Height="190px"
            Width="420px" MarkFirstMatch="true" DataSourceID="SessionDataSource1" EnableLoadOnDemand="true"
            HighlightTemplatedItems="true" OnClientItemsRequested="UpdateItemCountField"
            OnDataBound="RadComboBox1_DataBound" OnItemDataBound="RadComboBox1_ItemDataBound"
            OnItemsRequested="RadComboBox1_ItemsRequested">
            <HeaderTemplate>
                <ul>
                    <li class="col1">Contact Name</li>
                    <li class="col2">City</li>
                    <li class="col3">Title</li>
                </ul>
            </HeaderTemplate>
            <ItemTemplate>
                <ul>
                    <li class="col1">
                        <%# DataBinder.Eval(Container.DataItem, "ContactName") %></li>
                    <li class="col2">
                        <%# DataBinder.Eval(Container.DataItem, "City") %></li>
                    <li class="col3">
                        <%# DataBinder.Eval(Container.DataItem, "ContactTitle") %></li>
                </ul>
            </ItemTemplate>
            <FooterTemplate>
                A total of
                <asp:Literal runat="server" ID="RadComboItemsCount" />
                items
            </FooterTemplate>
        </telerik:RadComboBox>
        <asp:Button runat="server" ID="Button1" Text="Select" OnClick="Button1_Click" />
        <br />
        <asp:Label runat="server" ID="Label2" AssociatedControlID="RadComboBox2" Text="Multiple rows and columns:" />
        <telerik:RadComboBox ID="RadComboBox2" runat="server" Height="190px"
            Width="420px" DropDownCssClass="multipleRowsColumns" DropDownWidth="460px">
        </telerik:RadComboBox>
        <asp:Label runat="server" ID="Label1" CssClass="selection-result" />
        <sds:SessionDataSource ID="SessionDataSource1" runat="server" PrimaryKeyFields="CustomerID"
            DisplayWarning="False" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
            ClearSessionOnInitialLoad="True" SelectCommand="SELECT * FROM [Customers]" SessionKey="System.Web.UI.Page_DataSource1">
        </sds:SessionDataSource>

        <script type="text/javascript">
            function UpdateItemCountField(sender, args) {
                //set the footer text
                sender.get_dropDownElement().lastChild.innerHTML = "A total of " + sender.get_items().get_count() + " items";
            }
        </script>

        <!-- content end -->
        <qsf:Footer runat="server" ID="Footer1" />
        </form>
    </body>
    </html>

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