Gets the namespace URI mapped to the specified prefix.
Assembly: System.Xml (in System.Xml.dll)
Function LookupNamespace ( _ prefix As String _ ) As String
string LookupNamespace( string prefix )
String^ LookupNamespace( String^ prefix )
abstract LookupNamespace : prefix:string -> string
Parameters
- prefix
- Type: System.String
The prefix whose namespace URI you wish to find.
Return Value
Type: System.StringThe namespace URI that is mapped to the prefix; null if the prefix is not mapped to a namespace URI.
Note
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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.
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Prefix |
Return Value |
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xml |
http://www.w3.org/XML/1998/namespace |
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xmlns |
http://www.w3.org/2000/xmlns/ |
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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). |
.NET Framework
Supported in: 4, 3.5, 3.0, 2.0.NET Framework Client Profile
Supported in: 4, 3.5 SP1Portable Class Library
Supported in: Portable Class LibraryWindows 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.