GetNamespaceOfPrefix Method

XmlNode.GetNamespaceOfPrefix Method

Looks up the closest xmlns declaration for the given prefix that is in scope for the current node and returns the namespace URI in the declaration.

[Visual Basic]
Public Overridable Function GetNamespaceOfPrefix( _
   ByVal prefix As String _
) As String
public virtual string GetNamespaceOfPrefix(
 string prefix
public: virtual String* GetNamespaceOfPrefix(
 String* prefix
public function GetNamespaceOfPrefix(
   prefix : String
) : String;


Prefix whose namespace URI you want to find.

Return Value

The namespace URI of the specified prefix.


This method is a Microsoft extension to the Document Object Model (DOM).


[Visual Basic, C#, C++] The following example adds a new attribute to the XML document.

[Visual Basic] 
Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    Public Shared Sub Main()
        Dim doc As New XmlDocument()
        doc.LoadXml("<book xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>" & _
        Dim root As XmlNode = doc.FirstChild
        'Create a new attribute.
        Dim ns As String = root.GetNamespaceOfPrefix("bk")
        Dim attr As XmlNode = doc.CreateNode(XmlNodeType.Attribute, "genre", ns)
        attr.Value = "novel"
        'Add the attribute to the document.
        Console.WriteLine("Display the modified XML...")
    End Sub 'Main 
End Class 'Sample

using System;
using System.IO;
using System.Xml;

public class Sample {

  public static void Main() {

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +

    XmlNode root = doc.FirstChild;

    //Create a new attribute.
    string ns = root.GetNamespaceOfPrefix("bk");
    XmlNode attr = doc.CreateNode(XmlNodeType.Attribute, "genre", ns);
    attr.Value = "novel";

    //Add the attribute to the document.

    Console.WriteLine("Display the modified XML...");


#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;

int main()
    XmlDocument* doc = new XmlDocument();
    doc->LoadXml(S"<book xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>" 
                 S"<title>Pride And Prejudice</title>" 

    XmlNode* root = doc->FirstChild;

    //Create a new attribute.
    String* ns = root->GetNamespaceOfPrefix(S"bk");
    XmlNode* attr = doc->CreateNode(XmlNodeType::Attribute, S"genre", ns);
    attr->Value = S"novel";

    //Add the attribute to the document.

    Console::WriteLine(S"Display the modified XML...");


[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.


Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, .NET Compact Framework

See Also

XmlNode Class | XmlNode Members | System.Xml Namespace

© 2015 Microsoft