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IXmlNamespaceResolver.LookupNamespace Method

Gets the namespace URI mapped to the specified prefix.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)

string LookupNamespace(
	string prefix
)

Parameters

prefix
Type: System.String

The prefix whose namespace URI you wish to find.

Return Value

Type: System.String
The namespace URI that is mapped to the prefix; null if the prefix is not mapped to a namespace URI.

NoteNote:

Namespace URI-to-prefix mappings can change from node to node in an XML document. You cannot depend on the result of a lookup being consistent from one node to the next.

The following table describes how the default and built-in namespaces are handled by the LookupNamespace method.

Prefix

Return Value

xml

http://www.w3.org/XML/1998/namespace

xmlns

http://www.w3.org/2000/xmlns/

String.Empty (A default namespace has been assigned).

The currently assigned default namespace.

String.Empty (The default namespace has not been explicitly assigned).

String.Empty (The blank prefix is associated with elements that are not in any namespace).

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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