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Version Q2 2011 released 07/12/2011
select

Menu / Add/Remove/Disable Items

Available actions

  • This example demonstrates how to add, remove and disable items using the server-side API.

    C#

    • Adding item
      //Creating root item
      RadMenuItem item = new RadMenuItem("Root item text");
      RadMenu1.Items.Add(item);
      //Creating child item
      RadMenuItem childItem = new RadMenuItem("Child item text");
      item.Items.Add(childItem);
      
    • Removing an item
      //Removing root item
      RadMenu1.Items.Remove(RadMenu1.Items[0]);
      //Removing child item (the first one)
      RadMenu1.Items[0].Items.RemoveAt(0);
      //Removing arbitrary item
      RadMenu1.SelectedItem.Remove();
      
    • Disabling an item
      RadMenu1.SelectedItem.Enabled = false;
      

    VB.NET

    • Adding item
      'Creating root item
      Dim item As RadMenuItem = New RadMenuItem("Root item text")
      RadMenu1.Items.Add(item)
      'Creating child item
      Dim childItem As RadMenuItem = New RadMenuItem("Child item text")
      item.Items.Add(childItem)
      
    • Removing an item
      'Removing root item
      RadMenu1.Items.Remove(RadMenu1.Items(0))
      'Removing child item (the first one)
      RadMenu1.Items[0].Items.RemoveAt(0)
      'Removing arbitrary item
      RadMenu1.SelectedItem.Remove()
      
    • Disabling an item
      RadMenu1.SelectedItem.Enabled = false
      

Source Code

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

    <%@ Page CodeFile="DefaultCS.aspx.cs" Language="c#" AutoEventWireup="true" Inherits="Telerik.Web.Examples.Menu.AddRemoveItems.DefaultCS" %>

    <!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"></qsf:HeadTag>
        <link rel="stylesheet" type="text/css" href="styles.css" />
    </head>
    <body class="BODY">
        <form runat="server" id="mainForm" method="post">
            <qsf:Header ID="Header1" runat="server" NavigationLanguage="C#"></qsf:Header>
            <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
            <telerik:RadAjaxManager runat="server" ID="RadAjaxManager1">
                <AjaxSettings>
                    <telerik:AjaxSetting AjaxControlID="DisableButton">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="RadMenu1" LoadingPanelID="RadAjaxLoadingPanel1" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                    <telerik:AjaxSetting AjaxControlID="EnableAllButton">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="RadMenu1" LoadingPanelID="RadAjaxLoadingPanel1" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                    <telerik:AjaxSetting AjaxControlID="DeleteButton">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="RadMenu1" LoadingPanelID="RadAjaxLoadingPanel1" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                    <telerik:AjaxSetting AjaxControlID="AddButton">
                        <UpdatedControls>
                            <telerik:AjaxUpdatedControl ControlID="RadMenu1" LoadingPanelID="RadAjaxLoadingPanel1" />
                        </UpdatedControls>
                    </telerik:AjaxSetting>
                </AjaxSettings>
            </telerik:RadAjaxManager>
            <telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1" />
            <qsf:ConfiguratorPanel runat="server" ID="ConfigurationPanel1" Title="Available actions" Orientation="Vertical" CssClass="qsfRightConfig" Expanded="true">
                <ul class="qsfexAvailableActions">
                    <li>
    <asp:Button CssClass="qsfButtonBig" ID="DisableButton" runat="server" OnClick="DisableButton_Click"
    ValidationGroup="DisableRequiresSelection" Text="Disable selected item"></asp:Button>

    <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Select a item first."
    ControlToValidate="RadMenu1" Display="Dynamic" ValidationGroup="DisableRequiresSelection" CssClass="validator"></asp:RequiredFieldValidator>

                    </li>
                    <li>
    <asp:Button CssClass="qsfButtonBig" ID="EnableAllButton" runat="server" CausesValidation="False"
    OnClick="EnableAll_Button" Text="Enable all items"></asp:Button>

                    </li>
                    <li>
    <asp:Button CssClass="qsfButtonBig" ID="DeleteButton" runat="server" OnClick="DeleteButton_Click"
    ValidationGroup="DeleteRequiresSelection" Text="Delete selected item"></asp:Button>

    <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="Select a item first."
    Display="Dynamic" ControlToValidate="RadMenu1" ValidationGroup="DeleteRequiresSelection" CssClass="validator"></asp:RequiredFieldValidator>

                    </li>
                    <li>
                        <telerik:RadTextBox runat="Server" ID="itemTextBox" EmptyMessage="Enter item text"></telerik:RadTextBox>
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Text is required"
    Display="Dynamic" ControlToValidate="itemTextBox" ValidationGroup="TextRequired" CssClass="validator"></asp:RequiredFieldValidator>

    <asp:Button CssClass="qsfButton" ID="AddButton" runat="server" OnClick="AddButton_Click"
    ValidationGroup="TextRequired" Text="Add new item"></asp:Button>

                    </li>
                </ul>
            </qsf:ConfiguratorPanel>
            <telerik:RadMenu ID="RadMenu1" runat="server" EnableRoundedCorners="true" EnableShadows="true" />
            <qsf:Footer ID="Footer1" runat="server"></qsf:Footer>
        </form>
    </body>
    </html>

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