XmlNode.GetNamespaceOfPrefix Method (System.Xml)

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.NET Framework Class Library

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.

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

Syntax

Visual Basic

Public Overridable Function GetNamespaceOfPrefix ( _
	prefix As String _
) As String

public virtual string GetNamespaceOfPrefix(
	string prefix
)

Visual C++

public:
virtual String^ GetNamespaceOfPrefix(
	String^ prefix
)

abstract GetNamespaceOfPrefix : 
        prefix:string -> string 
override GetNamespaceOfPrefix : 
        prefix:string -> string

Parameters

prefix: Type: System.String
Prefix whose namespace URI you want to find.

Return Value

Type: System.String
The namespace URI of the specified prefix.

Remarks

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

Examples

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>" & _
                    "</book>")

        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.
        root.Attributes.SetNamedItem(attr)

        Console.WriteLine("Display the modified XML...")
        doc.Save(Console.Out)
    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>" +
                "</book>");

    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.
    root.Attributes.SetNamedItem(attr);

    Console.WriteLine("Display the modified XML...");
    doc.Save(Console.Out);

  }
}

Visual C++


#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>"
   "<title>Pride And Prejudice</title>"
   "</book>" );
   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.
   root->Attributes->SetNamedItem( attr );
   Console::WriteLine( "Display the modified XML..." );
   doc->Save( Console::Out );
}

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

XmlNode Class

System.Xml Namespace