XmlTextReader.LookupNamespace(String) Method

Definition

Namespace:

System.Xml

Assembly:

System.Xml.ReaderWriter.dll

Source:

XmlTextReader.cs

Resolves a namespace prefix in the current element's scope.

public:
 override System::String ^ LookupNamespace(System::String ^ prefix);

public override string? LookupNamespace (string prefix);

override this.LookupNamespace : string -> string

Public Overrides Function LookupNamespace (prefix As String) As String

Parameters

prefix

String

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

String

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

Exceptions

ArgumentNullException

The Namespaces property is set to true and the prefix value is null.

Remarks

Note

Starting with the .NET Framework 2.0, we recommend that you create XmlReader instances by using the XmlReader.Create method to take advantage of new functionality.

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.

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

See also

• XmlReader