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IXmlNamespaceResolver.LookupNamespace(String) Method

  • Reference

Definition

Namespace:
System.Xml
Assembly:
System.Xml.ReaderWriter.dll
Assembly:
System.Xml.dll
Assembly:
netstandard.dll

Gets the namespace URI mapped to the specified prefix.

public:
 System::String ^ LookupNamespace(System::String ^ prefix);
public string LookupNamespace (string prefix);
public string? LookupNamespace (string prefix);
abstract member LookupNamespace : string -> string
Public Function LookupNamespace (prefix As String) As String

Parameters

prefix
String

The prefix whose namespace URI you wish to find.

Returns

String

The namespace URI that is mapped to the prefix; null if the prefix is not mapped to a namespace URI.

Remarks

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 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).

Applies to