SiteMapNode Constructor (SiteMapProvider, String, String, String)
Initializes a new instance of the SiteMapNode class using the specified URL, a key to identify the page that the node represents, a title, and the site map provider that manages the node.
Assembly: System.Web (in System.Web.dll)
Parameters
- provider
- Type: System.Web::SiteMapProvider
The SiteMapProvider with which the node is associated.
- key
- Type: System::String
A provider-specific lookup key.
- url
- Type: System::String
The URL of the page that the node represents within the site.
- title
- Type: System::String
A label for the node, often displayed by navigation controls.
| Exception | Condition |
|---|---|
| ArgumentNullException | SiteMapProvider is nullptr. - or - key is nullptr. |
The XmlSiteMapProvider class, which is the default SiteMapProvider provider implementation for ASP.NET, uses the SiteMapNode::Url property as a lookup key, if one is provided for the node (if a URL is not provided, a tracking identifier is generated for the node). Therefore, any SiteMapNode object that provides a URL and is used by the XmlSiteMapProvider must have a unique URL within the scope of the provider.
If no title is provided, calls to the Title property return the String::Empty field.
The following code example demonstrates how to use the SiteMapNode constructor to create a new instance of the SiteMapNode class. The node is initialized with values from a Microsoft Access database row.
This code example is part of a larger example provided for the BuildSiteMap method.
OleDbCommand^ rootNodeCommand = gcnew OleDbCommand ("SELECT nodeid, url, name FROM SiteMap WHERE parentnodeid IS NULL", accessConnection); OleDbDataReader^ rootNodeReader = rootNodeCommand->ExecuteReader(); if ( rootNodeReader->HasRows ) { rootNodeReader->Read(); rootNodeId = rootNodeReader->GetInt32( 0 ); // Create a SiteMapNode that references the current StaticSiteMapProvider. rootNode = gcnew SiteMapNode(this, rootNodeId.ToString(), rootNodeReader->GetString( 1 ),rootNodeReader->GetString( 2 )); } else return nullptr; rootNodeReader->Close();
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.