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Version Q2 2011 released 07/12/2011
select

TreeList / Accessibility

Restaurant menu
Category IDProductPriceParent Category ID
Change page:
AAppetizers  
  A1Southwestern Twisted Chips$6.79A
  A2Top Shelf Combo Appetizer$9.49A
BBeverages  

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.


  • This example demonstrates the accessibility compliance of the RadTreeList control. It satisfies the requirements of "Section 508" for software accessibility, as well as those of "Level AA" (in accordance with the W3C Web Accessibility Guidelines 2.0).

Source Code

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

    <%@ Register TagPrefix="telerik" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="telerik" TagName="Header" Src="~/Common/Header.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="HeadTag" Src="~/Common/HeadTag.ascx" %>
    <%@ Register TagPrefix="telerik" TagName="Footer" Src="~/Common/Footer.ascx" %>
    <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
    <%@ 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">
        <telerik:HeadTag runat="server" ID="Headtag2" />
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
        <telerik:Header runat="server" ID="Header1" NavigationLanguage="CS" />
        <!-- content start -->
        <telerik:RadScriptManager ID="RadScriptManager1" runat="server" />
        <telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" />
        <telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" LoadingPanelID="RadAjaxLoadingPanel1">
            <telerik:RadTreeList ID="RadTreeList1" runat="server" OnNeedDataSource="RadTreeList1_NeedDataSource"
                AutoGenerateColumns="false" ParentDataKeyNames="ParentID" AllowPaging="true"
                PageSize="4" AllowMultiItemSelection="true" DataKeyNames="ID" AllowSorting="true"
                Summary="Restaurant menu" Caption="Restaurant menu" OnItemDataBound="RadTreeList1_ItemDataBound">
                <PagerTemplate>
                    Change page:
    <asp:Button ID="Button1" ToolTip="Previous Page" CommandName="Page" CommandArgument="Prev"
    CssClass="rtlPagePrev" runat="server" />
    <asp:Button ID="Button2" ToolTip="Next Page" CommandName="Page" CommandArgument="Next"
    CssClass="rtlPageNext" runat="server" />
                </PagerTemplate>
                <ClientSettings Selecting-AllowToggleSelection="true" Selecting-AllowItemSelection="true" />
                <Columns>
                    <telerik:TreeListBoundColumn DataField="ID" UniqueName="ID" HeaderText="Category ID" />
                    <telerik:TreeListBoundColumn DataField="ProductName" UniqueName="ProductName" HeaderText="Product">
                    </telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="Price" UniqueName="Price" DataFormatString="{0:C}"
                        HeaderText="Price">
                        <ItemStyle HorizontalAlign="Right" />
                    </telerik:TreeListBoundColumn>
                    <telerik:TreeListBoundColumn DataField="ParentID" UniqueName="ParentID" HeaderText="Parent Category ID" />
                </Columns>
            </telerik:RadTreeList>
        </telerik:RadAjaxPanel>
        <div>
            <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>
        <telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" />
        <!-- content end -->
        <telerik:Footer runat="server" ID="Footer1"></telerik:Footer>
        </form>
    </body>
    </html>

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