protected internal override void RemoveNode(SiteMapNode node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
lock (_lock) {
SiteMapNode oldParent = (SiteMapNode)ParentNodeTable[node];
if (ParentNodeTable.Contains(node))
{
ParentNodeTable.Remove(node);
}
if (oldParent != null)
{
SiteMapNodeCollection collection = (SiteMapNodeCollection)ChildNodeCollectionTable[oldParent];
if (collection != null && collection.Contains(node))
{
collection.Remove(node);
}
}
string url = node.Url;
if (url != null && url.Length > 0 && UrlTable.Contains(url))
{
UrlTable.Remove(url);
}
string key = node.Key;
if (KeyTable.Contains(key))
{
KeyTable.Remove(key);
}
}
}
private void EnsureChildSiteMapProviderUpToDate(SiteMapProvider childProvider)
{
SiteMapNode oldNode = (SiteMapNode)ChildProviderTable[childProvider];
SiteMapNode newNode = childProvider.GetRootNodeCore();
if (newNode == null)
{
throw new ProviderException(SR.GetString(SR.XmlSiteMapProvider_invalid_sitemapnode_returned, childProvider.Name));
}
// child providers have been updated.
if (!oldNode.Equals(newNode))
{
// If the child provider table has been updated, simply return null.
// This will happen when the current provider's sitemap file is changed or Clear() is called;
if (oldNode == null)
{
return;
}
lock (_lock) {
oldNode = (SiteMapNode)ChildProviderTable[childProvider];
// If the child provider table has been updated, simply return null. See above.
if (oldNode == null)
{
return;
}
newNode = childProvider.GetRootNodeCore();
if (newNode == null)
{
throw new ProviderException(SR.GetString(SR.XmlSiteMapProvider_invalid_sitemapnode_returned, childProvider.Name));
}
if (!oldNode.Equals(newNode))
{
// If the current provider does not contain any nodes but one child provider
// ie. _siteMapNode == oldNode
// the oldNode needs to be removed from Url table and the new node will be added.
if (_siteMapNode.Equals(oldNode))
{
UrlTable.Remove(oldNode.Url);
KeyTable.Remove(oldNode.Key);
UrlTable.Add(newNode.Url, newNode);
KeyTable.Add(newNode.Key, newNode);
_siteMapNode = newNode;
}
// First find the parent node
SiteMapNode parent = (SiteMapNode)ParentNodeTable[oldNode];
// parent is null when the provider does not contain any static nodes, ie.
// it only contains definition to include one child provider.
if (parent != null)
{
// Update the child nodes table
SiteMapNodeCollection list = (SiteMapNodeCollection)ChildNodeCollectionTable[parent];
// Add the newNode to where the oldNode is within parent node's collection.
int index = list.IndexOf(oldNode);
if (index != -1)
{
list.Remove(oldNode);
list.Insert(index, newNode);
}
else
{
list.Add(newNode);
}
// Update the parent table
ParentNodeTable[newNode] = parent;
ParentNodeTable.Remove(oldNode);
// Update the Url table
UrlTable.Remove(oldNode.Url);
KeyTable.Remove(oldNode.Key);
UrlTable.Add(newNode.Url, newNode);
KeyTable.Add(newNode.Key, newNode);
}
else
{
// Notify the parent provider to update its child provider collection.
XmlSiteMapProvider provider = ParentProvider as XmlSiteMapProvider;
if (provider != null)
{
provider.EnsureChildSiteMapProviderUpToDate(this);
}
}
// Update provider nodes;
ChildProviderTable[childProvider] = newNode;
_childProviderList = null;
}
}
}
}
