IXmlNamespaceResolver.LookupPrefix Method
Gets the prefix that is mapped to the specified namespace URI.
Namespace: System.Xml
Assembly: System.Xml (in System.Xml.dll)
Parameters
- namespaceName
- Type: System.String
The namespace URI whose prefix you wish to find.
Return Value
Type: System.StringThe prefix that is mapped to the namespace URI; null if the namespace URI is not mapped to a prefix.
It is possible for a namespace URI to be mapped to multiple prefixes. Because the prefixes are not mapped in a predictable manner, you should not depend on getting back a particular prefix when a namespace URI is mapped to more than one prefix.
 Note |
|---|
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 LookupPrefix method.
Namespace | Return value |
|---|---|
http://www.w3.org/XML/1998/namespace | xml |
http://www.w3.org/2000/xmlns/ | xmlns |
An empty namespace. | A default namespace that has not been defined. |
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
