开发支持三级目录的导航菜单

MOSS的导航菜单默认只支持两级,但是MOSS的导航API实际上是支持无限级的,比如可以用以下代码添加三级导航栏:

using (SPSite site = new SPSite("http://codeart:81"))

{

using (SPWeb web = site.RootWeb)

{

web.AllowUnsafeUpdates = true;

Microsoft.SharePoint.Navigation.SPNavigation sp = web.Navigation;

SPNavigationNode spn = new SPNavigationNode("Google", "www.google.com", true);

SPNavigationNode spn2 = new SPNavigationNode("Google1", "www.google.com", true);

SPNavigationNode spn3= new SPNavigationNode("Google2", "www.google.com", true);

sp.QuickLaunch.AddAsLast(spn);

spn.Children.AddAsLast(spn2);

spn2.Children.AddAsLast(spn3);

web.Update();

}

}

这样添加了三级导航菜单之后,系统默认的界面依然显示不出来。

我们只能通过自己开发导航控件的方式来实现这一点。代码如下:

using System;

using System.Collections.Generic;

using System.Text;

using System.Web.UI.WebControls;

using Microsoft.SharePoint;

using Microsoft.SharePoint.Navigation;

namespace CodeArt.SharePoint.WebParts

{

public class NavigationMenu : Menu

{

protected override void CreateChildControls()

{

if (this.Items.Count > 0)

return;

base.CreateChildControls();

SPWeb web = SPContext.Current.Web;

Microsoft.SharePoint.Navigation.SPNavigation sp = web.Navigation;

BuildMenuItem(sp.QuickLaunch, this.Items);

}

 

void BuildMenuItem(SPNavigationNodeCollection navNodes, MenuItemCollection menuItems)

{

foreach (SPNavigationNode navNode in navNodes)

{

MenuItem menuItem = new MenuItem();

menuItem.Text = navNode.Title;

menuItem.NavigateUrl = navNode.Url;

menuItems.Add(menuItem);

BuildMenuItem(navNode.Children, menuItem.ChildItems);

}

}

}

}

以上控件继承于Menu,在CreateChildControl方法中调用导航API,递归生成菜单项。

将项目编译,将DLL部署到GAC中,然后可以修改母板页,添加NavigationMenu控件。

在母板页的头部添加注册指令:    

<%@ Register Tagprefix="CodeArt" Namespace="CodeArt.SharePoint.WebParts" Assembly="CodeArt.SharePoint, Version=1.0.0.0, Culture=neutral, PublicKeyToken=cd1ced297a124f81" %>

将QuickLaunchNavigationManager控件删掉,添加以下代码:

    <CodeArt:NavigationMenu runat="server" ID="navMenu" Width="100%" StaticDisplayLevels="3"/>

最终,NavigationMenu导航控件的效果下图所示。

开发支持三级目录的导航菜单

MOSS的导航在WSS导航的基础上增加了访问群体的功能,利用访问群体,可以控制导航菜单上的一个节点只能被某个组中的用户看到,如果直接从SPWeb的Navigation属性中获取导航节点,是不能应用访问群体逻辑的,要使导航控件兼容访问群体的控制逻辑,可以调用PortalSiteMapProvider的相应方法来获取导航节点。PortalSiteMapProvider在程序集Microsoft.SharePoint.Publishing.dll中,首先添加对这个程序集的引用,调用PortalSiteMapProvider实现导航的控件代码如下:

using System;

using System.Web;

using System.Web.UI.WebControls;

using Microsoft.SharePoint;

using Microsoft.SharePoint.Navigation;

using Microsoft.SharePoint.Publishing.Navigation;

 

namespace CodeArt.SharePoint.WebParts

{

/// <summary>

/// 适合于MOSS的多级导航控件

/// </summary>

public class MOSSNavigationMenu : Menu

{

protected override void CreateChildControls()

{

if (this.Items.Count > 0)

return;

base.CreateChildControls();

PortalSiteMapProvider mossSiteMapProvider = new PortalSiteMapProvider();

SiteMapNodeCollection oneLevelNodes = mossSiteMapProvider.RootNode.ChildNodes ;

BuildMenuItem( oneLevelNodes , this.Items);

}

 

/// <summary>

/// 递归生成菜单项

/// </summary>

/// <param name="navNodes"></param>

/// <param name="menuItems"></param>

void BuildMenuItem(SiteMapNodeCollection navNodes, MenuItemCollection menuItems)

{

foreach (SiteMapNode navNode in navNodes)

{

MenuItem menuItem = new MenuItem();

menuItem.Text = navNode.Title;

menuItem.NavigateUrl = navNode.Url;

menuItems.Add(menuItem);

BuildMenuItem(navNode.ChildNodes, menuItem.ChildItems);

}

}

}

}

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