using System;
using System.Collections;
using System.Globalization;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml;
using System.Xml.XPath;
using Microsoft.SharePoint.Utilities;
 
namespace MMOinsite.SharePoint.Components
{
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal),
     AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    public class ListNavigation : HierarchicalDataBoundControl
    {
        private XmlDocument navigationTree;
        private string currentNodeKey = string.Empty;
 
        private string linkClass = "NavLeftLink";
        private string listItemClass = "NavLeftListItem";
        private string listClass = "NavLeftList";
        private string linkSelectedClass = "NavLeftListItemSelected";
 
        private bool appendLevel = false;
        private string appendLevelClass = "NavLeftListItem";
 
        protected override void PerformDataBinding()
        {
            base.PerformDataBinding();
 
            // Oh god, no data source! ABORT!
            if (!IsBoundUsingDataSourceID && (DataSource == null))
                return;
 
            HierarchicalDataSourceView view = GetData("");
 
            if (view == null)
                throw new InvalidOperationException("Cannot get any data from the data source control.");
 
            IHierarchicalEnumerable enumerable = view.Select();
            if (enumerable != null)
            {
                navigationTree = new XmlDocument();
                navigationTree.LoadXml("<nodes></nodes>");
 
                try
                {
                    AddNavigationItem(navigationTree.DocumentElement, enumerable, 1);
                }
                finally { }
 
                ViewState["navXml"] = navigationTree.OuterXml;
            }
        }
 
        private void AddNavigationItem(XmlElement currentNode, IHierarchicalEnumerable enumerable, int depth)
        {
            foreach (object item in enumerable)
            {
                IHierarchyData data = enumerable.GetHierarchyData(item);
 
                NavigationItem navItem = BuildNavigationItem(data, depth);
 
                XmlElement newNavElement = BuildNavigationNode(currentNode, navItem);
 
                currentNode.AppendChild(newNavElement);
 
                if(data.HasChildren)
                {
                    IHierarchicalEnumerable newEnumerable = data.GetChildren();
 
                    if(newEnumerable != null)
                        AddNavigationItem(newNavElement, newEnumerable, depth + 1);
                }
            }
        }
 
        private NavigationItem BuildNavigationItem(IHierarchyData data, int depth)
        {
            NavigationItem tmpNavItem = new NavigationItem();
 
            try
            {
                INavigateUIData navNode = (INavigateUIData)data;
 
                tmpNavItem.Title = navNode.Value;
                tmpNavItem.Url = navNode.NavigateUrl;
                tmpNavItem.Level = depth;
 
                if (currentNodeKey.Length == 0)
                {
                    SiteMapDataSource dataSource = GetDataSource() as SiteMapDataSource;
 
                    if (dataSource != null)
                        if (dataSource.Provider.CurrentNode != null)
                            currentNodeKey = dataSource.Provider.CurrentNode.Url.ToLower();
                }
 
                if (string.Compare(tmpNavItem.Url, currentNodeKey, true, CultureInfo.InvariantCulture) == 0)
                    tmpNavItem.Selected = true;
            }
            catch (Exception ex)
            {
                throw ex;
            }
 
            return tmpNavItem;
        }
 
        private NavigationItem BuildNavigationItem(XmlNode node)
        {
            NavigationItem tmpNavItem = new NavigationItem();
 
            tmpNavItem.Title = node.Attributes["title"].InnerText;
            tmpNavItem.Url = node.Attributes["url"].InnerText;
            tmpNavItem.Selected = Convert.ToBoolean(node.Attributes["isSelected"].InnerText);
            tmpNavItem.Level = Convert.ToInt32(node.Attributes["level"].InnerText);
 
            return tmpNavItem;
        }
 
        private XmlElement BuildNavigationNode(XmlElement parentNode, NavigationItem navItem)
        {
            XmlElement tmpNode = navigationTree.CreateElement("node");
 
            tmpNode.SetAttribute("url", navItem.Url);
            tmpNode.SetAttribute("title", navItem.Title);
            tmpNode.SetAttribute("level", navItem.Level.ToString());
            tmpNode.SetAttribute("isSelected", navItem.Selected.ToString());
 
            return tmpNode;
        }
 
        protected override void Render(HtmlTextWriter writer)
        {
            if (navigationTree == null && ViewState["navXml"] != null)
            {
                navigationTree = new XmlDocument();
                navigationTree.LoadXml(ViewState["navXml"].ToString());
            }
 
            XmlNodeList nodeList = navigationTree.SelectNodes("nodes/node");
 
            if (nodeList.Count > 0)
            {
                WriteListStart(writer);
                foreach (XmlNode node in nodeList)
                {
                    Render(node, writer);
                }
                WriteListEnd(writer);
            }
        }
 
        protected virtual void WriteListStart(HtmlTextWriter writer)
        {
            writer.Write(string.Format("<ul class=\"{0}\">", ListClass));
        }
 
        protected virtual void WriteListEnd(HtmlTextWriter writer)
        {
            writer.Write("</ul>");
        }
 
        protected virtual void Render(XmlNode navNode, HtmlTextWriter writer)
        {
            NavigationItem navItem = BuildNavigationItem(navNode);
 
            writer.Write(
                string.Format(
                    "<li class=\"{0}{1}\">",
                    ListItemClass,
                    (AppendLevel) ? string.Format(" {0}{1}", AppendLevelClass, navItem.Level) : ""
                )
            );
 
            writer.Write(
                string.Format(
                    "<a class=\"{0}\" href=\"{1}\">{2}</a>",
                    (navItem.Selected) ? LinkSelectedClass : LinkClass,
                    navItem.Url,
                    navItem.Title
                )
            );
 
            if (navNode.ChildNodes.Count > 0)
            {
                WriteListStart(writer);
 
                XmlNodeList nodeList = navNode.SelectNodes("node");
 
                foreach (XmlNode childNode in nodeList)
                    Render(childNode, writer);
 
                WriteListEnd(writer);
            }
 
            writer.Write("</li>");
        }
 
        public string ListClass
        {
            get { return listClass; }
            set { listClass = value; }
        }
 
        public string LinkSelectedClass
        {
            get { return linkSelectedClass; }
            set { linkSelectedClass = value; }
        }
 
        public string LinkClass
        {
            get { return linkClass; }
            set { linkClass = value; }
        }
 
        public string ListItemClass
        {
            get { return listItemClass; }
            set { listItemClass = value; }
        }
 
        public bool AppendLevel
        {
            get { return appendLevel; }
            set { appendLevel = value; }
        }
 
        public string AppendLevelClass
        {
            get { return appendLevelClass; }
            set { appendLevelClass = value; }
        }
    }
}

<%@ Register Tagprefix="asp" Namespace="MMOinsite.SharePoint.Components" Assembly="MMOinsite.SharePoint.Components, Version=1.0.0.0, Culture=neutral, PublicKeyToken=abb33cdce6ddaae1" %>
 
...
 
<Sharepoint:SPNavigationManager id="QuickLaunchNavigationManager"
    runat="server"
    QuickLaunchControlId="QuickLaunchMenu"
    ContainedControl="QuickLaunch"
    EnableViewState="false" >
    <div>
        <SharePoint:DelegateControl runat="server" ControlId="QuickLaunchDataSource">
            <Template_Controls>
                <asp:SiteMapDataSource
                    SiteMapProvider="SPNavigationProvider"
                    ShowStartingNode="False"
                    id="QuickLaunchSiteMap"
                    StartingNodeUrl="sid:1025"
                    runat="server"
                />
            </Template_Controls>
        </SharePoint:DelegateControl>
        <asp:ListNavigation id="CustomListNavigation" DataSourceId="QuickLaunchSiteMap" runat="server" />
    </div>
</SharePoint:SPNavigationManager>

.NavLeftLink{
	color: #2D2D2D;
}
 
.NavLeftListItem{
	background: #F2F8FF;
	margin-left: 0px;
	padding: 0px;
	width: 100%;
}
 
.NavLeftListItem2{
}
 
.NavLeftListItem a{
	padding: 2px 0px 2px 5px;
	border-top: solid 1px #25475A;
	width: 100%;
}
 
.NavLeftListItem a:hover{
	background: #D4F7B9;
}
 
.NavLeftListItem1 a{
	background: #BACCD6;
	font-size: 1.2em;
	font-weight: bold;
	border-bottom: solid 1px #25475A;
	margin-bottom: 1px;
}
 
.NavLeftListItem2 a{
	background: #F2F8FF;
	border: 0px;
	padding-left: 20px;
	font-size: 1em;
	font-weight: normal;
	background-image: url(/_layouts/images/navBullet.gif);
	background-repeat: no-repeat;
	background-position: 5px top;
}
 
.NavLeftListItem2 a:hover{
	background-image: url(/_layouts/images/navBullet.gif);
	background-repeat: no-repeat;
	background-position: 5px top;
}
 
.NavLeftListItemSelected{
	background: #D4F7B9;
}
 
.NavLeftList{
	margin-top: 0px;
	margin-left: 0px;
	list-style: none;
	border-bottom: solid 1px #25475A;	
}
 
.NavLeftList .NavLeftList{
	border: 0px;
}