ASPxClientMenuBase.GetItemCount Method

Returns the number of menu items at the root menu level.

Declaration

GetItemCount(): number

Returns

Type	Description
number	The number of root menu items.

Remarks

Use the ASPxClientMenuBase.GetItemCount method to get the number of root menu items in the ASPxMenuBase.Items collection.

Decrement the return value of this method by one to get the upper available value that you can pass to the ASPxClientMenuBase.GetItem method.

Note

This method returns an incorrect value if the EnableClientSideAPI property is set to false (default). Set this property to true to enable access to a control’s client-side object.

Example

This sample demonstrates how to disable sending a postback and generating the server ItemClick event for the menu items that contain sub-items. In this sample, the desired behavior is implemented by setting the e.processOnServer parameter to false within the handler of the menu client ItemClick event.

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v13.1" Namespace="DevExpress.Web.ASPxMenu" TagPrefix="dxm" %>

<!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 runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <p>
            Try clicking menu items.</p>
        <p>
            Note: Clicking a parent item (an item that has sub-items) does not fire the menu
            server-side ItemClick event.</p>
        <dxm:ASPxMenu ID="ASPxMenu1" runat="server" BorderBetweenItemAndSubMenu="HideAll"
            OnItemClick="ASPxMenu1_ItemClick" SelectParentItem="True" ShowPopOutImages="True">
            <Items>
                <dxm:MenuItem Text="Root 1">
                    <Items>
                        <dxm:MenuItem Text="Sub Item">
                            <Items>
                                <dxm:MenuItem Text="Item 1-1">
                                </dxm:MenuItem>
                                <dxm:MenuItem Text="Item 1-2">
                                </dxm:MenuItem>
                            </Items>
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 1-3">
                        </dxm:MenuItem>
                    </Items>
                </dxm:MenuItem>
                <dxm:MenuItem Text="Root 2">
                    <Items>
                        <dxm:MenuItem Text="Item 2-1">
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 2-2">
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 2-3">
                        </dxm:MenuItem>
                    </Items>
                </dxm:MenuItem>
            </Items>
            <ClientSideEvents ItemClick="function(s, e) {
    e.processOnServer = e.item.GetItemCount() == 0; // Prevent generating a postback for parent menu items
           }" />
        </dxm:ASPxMenu>
        <br />
        <br />
        <br />
        <br />
        <br />
        <asp:Label ID="Label1" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e) {

    }
    protected void ASPxMenu1_ItemClick(object source, DevExpress.Web.ASPxMenu.MenuItemEventArgs e) {
        Label1.Text = "The clicked item: " + e.Item.Text;
    }
}

<%@ Page Language="vb" AutoEventWireup="true"  CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ Register Assembly="DevExpress.Web.v13.1" Namespace="DevExpress.Web.ASPxMenu" TagPrefix="dxm" %>

<!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 runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <p>
            Try clicking menu items.</p>
        <p>
            Note: Clicking a parent item (an item that has sub-items) does not fire the menu
            server-side ItemClick event.</p>
        <dxm:ASPxMenu ID="ASPxMenu1" runat="server" BorderBetweenItemAndSubMenu="HideAll"
            OnItemClick="ASPxMenu1_ItemClick" SelectParentItem="True" ShowPopOutImages="True">
            <Items>
                <dxm:MenuItem Text="Root 1">
                    <Items>
                        <dxm:MenuItem Text="Sub Item">
                            <Items>
                                <dxm:MenuItem Text="Item 1-1">
                                </dxm:MenuItem>
                                <dxm:MenuItem Text="Item 1-2">
                                </dxm:MenuItem>
                            </Items>
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 1-3">
                        </dxm:MenuItem>
                    </Items>
                </dxm:MenuItem>
                <dxm:MenuItem Text="Root 2">
                    <Items>
                        <dxm:MenuItem Text="Item 2-1">
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 2-2">
                        </dxm:MenuItem>
                        <dxm:MenuItem Text="Item 2-3">
                        </dxm:MenuItem>
                    </Items>
                </dxm:MenuItem>
            </Items>
            <ClientSideEvents ItemClick="function(s, e) {
    e.processOnServer = e.item.GetItemCount() == 0; // Prevent generating a postback for parent menu items
           }" />
        </dxm:ASPxMenu>
        <br />
        <br />
        <br />
        <br />
        <br />
        <asp:Label ID="Label1" runat="server"></asp:Label>
    </div>
    </form>
</body>
</html>

Imports Microsoft.VisualBasic
Imports System
Imports System.Data
Imports System.Configuration
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls

Partial Public Class _Default
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

    End Sub
    Protected Sub ASPxMenu1_ItemClick(ByVal source As Object, ByVal e As DevExpress.Web.ASPxMenu.MenuItemEventArgs)
        Label1.Text = "Clicked item: " & e.Item.Text
    End Sub
End Class

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ASPxClientMenuBase.GetItemCount Method

Declaration

Returns

Remarks

Example