IXmlNamespaceResolver.LookupPrefix Method
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets the prefix that is mapped to the specified namespace URI.
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; Nothing 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. |
Note: