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Version Q2 2011 released 07/12/2011
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Slider / Accessibility

Single handle; AccessKey: A

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Accessibility validation

Validate with WAVE

WAVE is a free web accessibility evaluation tool, which checks for compliance issues with many of the Section 508 and WCAG guidelines. Have in mind that only humans can determine whether a web page is accessible - the above validation link is provided for the sake of completeness.


  • The interface of RadSlider for ASP.NET AJAX is level A accessible (in compliance with the W3C Web Accessibility Guidelines 2.0) as well as Section 508 compliant.

    RadSlider passes the check of the WAVE automated content compliance tool for Section 508 and WCAG 2.0 - Compliance Level A.

    Keyboard Support:

    • Press "Alt + AccessKey" ("Shift + Alt + AccessKey" for Firefox) or use Tab to focus the first handle of a slider. Press Tab to focus the second handle.
    • Press "RightArrow/UpArrow" to increase the value of a focused handle with a small change. Press "LeftArrow/DownArrow" to decrease the value of a focused handle with a small change.
    • Press "PageUp" to increase the value of a focused handle with a large change. Press "PageDown" to increase the value of a focused handle with a large change.
    • Press "Home" to put a focused handle to the minimum value. Press "End" to to put a focused handle to the maximum value.

    Note: By default tab-access is disabled in Safari. To enable it, check "Preferences > Advanced > Press tab to highlight each item on a page".

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="c#" AutoEventWireup="false" Inherits="Telerik.Web.Examples.Slider.Accessibility.DefaultCS"
        CodeFile="DefaultCS.aspx.cs" %>

    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="qsf" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="qsf" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <!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 ID="Headtag1" runat="server" />
    </head>
    <body class="BODY">
        <form id="Form1" method="post" runat="server">
        <qsf:Header ID="Header1" runat="server" ShowSkinChooser="false" NavigationLanguage="c#" />
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
        </telerik:RadScriptManager>
        <div style="margin:auto;width: 320px;">
        Single handle; AccessKey: A<br />
        <br />
        <telerik:RadSlider runat="server" Skin="Simple" ID="RadSlider1" Orientation="Horizontal" Width="300"
            Height="50" MinimumValue="0" MaximumValue="50" LargeChange="10" ItemType="Tick"
            EnableServerSideRendering="true" AccessKey="A" TabIndex="1">
        </telerik:RadSlider>
        </div>
        <div style="padding-top: 15px;">
            <h3>
                Accessibility validation</h3>
            <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">Validate with WAVE</asp:LinkButton>
            <p>
                WAVE is a free web accessibility evaluation tool, which checks for compliance issues
                with many of the Section 508 and WCAG guidelines. Have in mind that only humans
                can determine whether a web page is accessible - the above validation link is provided
                for the sake of completeness.</p>
        </div>
        <qsf:Footer runat="server" ID="Footer1" />
        </form>
    </body>
    </html>

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