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Version Q1 2012 released 04/11/2012
select

Menu / ADO.NET Service


  • Hover a menu item to populate its children from the ADO.NET Service

Source Code

C# VB.NET
Show code in new window Demo isolation steps
  • <%@ Page Language="C#" %>

    <%@ Register TagPrefix="qsf" Namespace="Telerik.QuickStart" %>
    <%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
    <%@ 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" %>
    <%@ Register Assembly="System.Web.Entity, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
        Namespace="System.Web.UI.WebControls" TagPrefix="asp" %>

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head id="Head1" runat="server">
        <qsf:HeadTag ID="Headtag1" runat="server"></qsf:HeadTag>
    </head>
    <body class="BODY">
        <form id="form1" runat="server">
        <div>
            <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
            </telerik:RadScriptManager>
            <qsf:Header ID="Header1" runat="server" NavigationLanguage="C#"></qsf:Header>

            <script type="text/javascript">
            //<![CDATA[
                function onSuccess(result, item) {
                    //the result in JSON format is available as a "d" field
                    var data = result.d;
                    //Traverse the array of objects and create combobox items
                    for (var i = 0; i < data.length; i++) {
                        var dataItem = data[i];

                        var childitem = new Telerik.Web.UI.RadMenuItem();
                        childitem.set_text(dataItem.Text);
                        childitem.set_value(dataItem.id);
                        item.get_items().add(childitem);
                    }
                    item.set_expandMode(Telerik.Web.UI.MenuItemExpandMode.ClientSide);
                    item.open();
                }

                function itemPopulating(sender, args) {
                    var item = args.get_item();
                    
                    //filter only the child items of the current item
                    var filter = "&$filter=parentId eq " + item.get_value();
                    
                    //Call the ADO.NET Data Service
                    $telerik.$.ajax({
                        type: "GET", // HTTP method
                        url: '<%= ResolveUrl("menuadonetservice.svc/Links?") %>' + filter, // ADO.NET DataService URL
                        contentType: "application/json; charset=utf-8", //request the result to be in JSON
                        dataType: "json",
                        success: function(result) { //callback method to invoke when the request is complete
                            onSuccess(result, item);
                        }
                    });
                    args.set_cancel(true);
                }
            //]]>
            </script>

            <telerik:RadMenu runat="server" ID="RadMenu1" DataSourceID="EntityDataSource1"
                DataTextField="Text" DataValueField="id" OnClientItemPopulating="itemPopulating"
                EnableRoundedCorners="true" EnableShadows="true">
                <DataBindings>
                    <telerik:RadMenuItemBinding Depth="0" ExpandMode="WebService" />
                </DataBindings>
            </telerik:RadMenu>
    <asp:EntityDataSource runat="server" ID="EntityDataSource1" ConnectionString="name=TelerikEntities"
    DefaultContainerName="TelerikEntities" EntitySetName="Links" Where="it.[parentId] IS NULL">
            </asp:EntityDataSource>        
            <div style="padding-top:80px;"></div>
            <qsf:Footer ID="Footer1" runat="server"></qsf:Footer>
        </div>
        </form>
    </body>
    </html>

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