How to create a new model? - mvcsitemapprovider

Question

I wish I could do the following: #Html.MvcSiteMap().PageMenu() instead of #Html.MvcSiteMap().Menu("MenuBtnGroup").
Mainly because of the filters.
I wish that a certain link to appear only on the page or sitemap and not in the main application menu
<mvcSiteMapNode title="Usuários" controller="Usuarios" action="Index">
<mvcSiteMapNode title="Novo Usuário" action="Novo" visibility="SiteMapPathHelper,PAGEMENU-ONLY,!*" />
<mvcSiteMapNode title="Detalhes" action="Detalhes" visibility="SiteMapPathHelper,!*" dynamicNodeProvider="UsuarioDynamicNodeProvider, Web">
<mvcSiteMapNode title="Editar" action="Editar" inheritedRouteParameters="id" />
</mvcSiteMapNode>
</mvcSiteMapNode>

Answer 1

This functionality isn't built-in (yet), but there is a way to make it happen by building your own visibility provider and using the SourceMetaData to pass the name of the menu into the visibility logic.
/// <summary>
/// Filtered SiteMapNode Visibility Provider for use with named controls.
///
/// Rules are parsed left-to-right, first match wins. Asterisk can be used to match any control or any control name. Exclamation mark can be used to negate a match.
/// </summary>
public class CustomFilteredSiteMapNodeVisibilityProvider
: SiteMapNodeVisibilityProviderBase
{
#region ISiteMapNodeVisibilityProvider Members
/// <summary>
/// Determines whether the node is visible.
/// </summary>
/// <param name="node">The node.</param>
/// <param name="sourceMetadata">The source metadata.</param>
/// <returns>
/// <c>true</c> if the specified node is visible; otherwise, <c>false</c>.
/// </returns>
public override bool IsVisible(ISiteMapNode node, IDictionary<string, object> sourceMetadata)
{
// Is a visibility attribute specified?
string visibility = string.Empty;
if (node.Attributes.ContainsKey("visibility"))
{
visibility = node.Attributes["visibility"].GetType().Equals(typeof(string)) ? node.Attributes["visibility"].ToString() : string.Empty;
}
if (string.IsNullOrEmpty(visibility))
{
return true;
}
visibility = visibility.Trim();
// Check for the source HtmlHelper
if (sourceMetadata["HtmlHelper"] == null)
{
return true;
}
string htmlHelper = sourceMetadata["HtmlHelper"].ToString();
htmlHelper = htmlHelper.Substring(htmlHelper.LastIndexOf(".") + 1);
string name = sourceMetadata["name"].ToString();
// All set. Now parse the visibility variable.
foreach (string visibilityKeyword in visibility.Split(new[] { ',', ';' }))
{
if (visibilityKeyword == htmlHelper || visibilityKeyword == name || visibilityKeyword == "*")
{
return true;
}
else if (visibilityKeyword == "!" + htmlHelper || visibilityKeyword == "!" + name || visibilityKeyword == "!*")
{
return false;
}
}
// Still nothing? Then it's OK!
return true;
}
#endregion
}
Then you can just name each of your menus by giving them a "name" SourceMetadata attribute.
#Html.MvcSiteMap().Menu(new { name = "MainMenu" })
#Html.MvcSiteMap().Menu(new { name = "PageMenu" })
And then use the CustomFilteredSiteMapVisibilityProvider instead of the FilteredVisibilityProvider in your configuration. See this answer for a complete example.