sharepoint - 如何访问Sharepoint SPNavigationNode.QuickLaunch属性？

Question

我有一个网站，如下所示：

--SiteA
---- Subsite1
---- Subsite2

现在每当我尝试访问QuickLaunch属性时，它始终为空，例如

SPNavigation nav = spWeb.Navigation;
if (nav.QuickLaunch.Count == 0)
{
      // ALWAYS TRUE
}

但是，如果我进入SiteA的“导航设置”（通过UI）并重新排序列表中的任何站点，则只有QuickLanuch可用。 （其他设置保留为默认设置）

谁能解释这种行为？我确实需要访问QuickLaunch项目。

谢谢

Answer 1

如果在创建网站时访问quicklaunch，则会发生此错误。下面的代码使功能激活的代码等待，直到创建网站集之后再执行。

using System.Threading;


public override void FeatureActivated(SPFeatureReceiverProperties properties)
    {
        //Queues changes until after site exists.  For use in provisioning.
        SPWeb web = properties.Feature.Parent as SPWeb;
        ThreadPool.QueueUserWorkItem(ApplyYourChanges, web.Url);
    }

private void ApplyYourChanges(object state)
    {
        string webUrl = state as string;
        Uri uri = new Uri(webUrl);

        // additional conditions here -- perhaps check if a feature was activated
        while (!SPSite.Exists(uri))
        {
            Thread.Sleep(5000);
        }
        using (SPSite site = new SPSite(webUrl))
        {
            using (SPWeb web = site.OpenWeb())
            {
                //configure the quicklaunch menu
                configureQuickLaunch(web);
            }
        }
    }

public static void configureQuickLaunch(SPWeb spWeb)
    {            
        SPNavigationNodeCollection nodeCollection = spWeb.Navigation.QuickLaunch;
        SPNavigationNode heading = nodeCollection.Cast<SPNavigationNode>().FirstOrDefault(n => n.Title == headingNode);
        SPNavigationNode item = heading.Children.Cast<SPNavigationNode>().FirstOrDefault(n => n.Url == url);
            if(item == null)
            {
                item = new SPNavigationNode(nodeName, url);
                item = heading.Children.AddAsLast(item);
            }
    }