Parameters

prefix

The prefix whose namespace URI you want to resolve. To match the default namespace, pass an empty string. This string does not have to be atomized.

Returns

The namespace URI to which the prefix maps or null if no matching prefix is found.

Exceptions

Type	Reason
ArgumentNullException	The XmlTextReader.Namespaces property of the current instance is true and prefix is null.

Remarks

Note:

In the dnprdnext release, the recommended practice is to create System.Xml.XmlReader instances using the erload:System.Xml.XmlReader.Create method. This allows you to take full advantage of the new features introduced in this release. For more information, see Creating XML Readers.

In the following XML, 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.

Example

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

Requirements