XElement.GetPrefixOfNamespace Method (System.Xml.Linq)

This method looks through the XML tree for namespace attributes that are in scope for this element. Namespace prefixes are specified in namespace attributes that are in the XML tree.

If the namespace is the default namespace, and there is no prefix for the namespace, then this method returns null.

The following example creates an XML tree that contains a namespace with a prefix. It then uses this method to retrieve the prefix for the namespace. Notice that this example uses the implicit conversion from string to XNamespace when calling this method.

XElement xmlTree = XElement.Parse("<Root xmlns:aw='http://www.adventure-works.com'/>");
string prefix = xmlTree.GetPrefixOfNamespace("http://www.adventure-works.com");
Console.WriteLine("Prefix: {0}", prefix);

Imports <xmlns:aw="http://www.adventure-works.com">

Module Module1
    Sub Main()
        Dim xmlTree As XElement = <aw:Root/>
        Dim prefix As String = xmlTree.GetPrefixOfNamespace("http://www.adventure-works.com")
        Console.WriteLine("Prefix: {0}", prefix)
    End Sub
End Module

This example produces the following output:

Prefix: aw

.NET Framework

.NET Framework Client Profile

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

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