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WCAG 2.0 and Section 508 Accessibility Compliance

RadComboBox is compliant with Section 508 and Level AA of the WCAG 2.0 Guidelines. Run WAVE, the automated web accessibility evaluation tool, to check the accessibility level of the control yourself.

This example shows the accessibility features of RadComboBox for ASP.NET AJAX. RadComboBox has keyboard navigation enabled as well as its ToolTip property set.

The control is also visible in Windows High Contrast mode when using Simple skin and when ShowToggleImage property is disabled.

  • DefaultVB.aspx
  • DefaultVB.aspx.vb
  • styles.css
<%@ Page Language="vb" CodeFile="DefaultVB.aspx.vb" AutoEventWireup="false" Inherits="ComboBox.Examples.Accessibility.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<!DOCTYPE html>
<html xmlns=''>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
    <link rel="stylesheet" type="text/css" href="styles.css" />

    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />

    <div class="demo-container size-thin">
        <telerik:RadComboBox RenderMode="Lightweight" ID="RadComboBox1" runat="server" Width="250" Height="150" 
            ShowToggleImage="true" EmptyMessage="Select a Company" DataSourceID="SqlDataSource1"
            DataTextField="CompanyName" DataValueField="CompanyName" EnableAutomaticLoadOnDemand="True"
            ItemsPerRequest="10" ToolTip="People ComboBox" ShowMoreResultsBox="true" EnableVirtualScrolling="true"
            Skin="Simple" AccessKey="T" TabIndex="1" MarkFirstMatch="true">

    <asp:LinkButton ID="LinkButton1" runat="server">Validate with WAVE</asp:LinkButton>
    <asp:SqlDataSource runat="server" ID="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
        ProviderName="System.Data.SqlClient" SelectCommand="SELECT [CompanyName] from [Customers] ORDER By [CompanyName]" />


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