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XmlReader.LookupNamespace Method

When overridden in a derived class, resolves a namespace prefix in the current element's scope.

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

'Declaration
Public MustOverride Function LookupNamespace ( _
	prefix As String _
) As String
'Usage
Dim instance As XmlReader
Dim prefix As String
Dim returnValue As String

returnValue = instance.LookupNamespace(prefix)
public abstract String LookupNamespace (
	String prefix
)
public abstract function LookupNamespace (
	prefix : String
) : String
Not applicable.

Parameters

prefix

The prefix whose namespace URI you want to resolve. To match the default namespace, pass an empty string.

Return Value

The namespace URI to which the prefix maps or a null reference (Nothing in Visual Basic) if no matching prefix is found.

In the following XML string, if the reader is positioned on the href attribute, the prefix a is resolved by calling reader.LookupNamespace("a"). The returned string is urn:456.

<root xmlns:a="urn:456">
  <item>
  <ref href="a:b"/>
  </item>
 </root>

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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