XmlNode.GetPrefixOfNamespace(String) Method

Definition

Namespace:

System.Xml

Assembly:

System.Xml.ReaderWriter.dll

Source:

XmlNode.cs

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

public:
 virtual System::String ^ GetPrefixOfNamespace(System::String ^ namespaceURI);

public virtual string GetPrefixOfNamespace (string namespaceURI);

abstract member GetPrefixOfNamespace : string -> string
override this.GetPrefixOfNamespace : string -> string

Public Overridable Function GetPrefixOfNamespace (namespaceURI As String) As String

Parameters

namespaceURI

String

The namespace URI whose prefix you want to find.

Returns

String

The prefix for the specified namespace URI.

Examples

The following example adds a new element to the XML document.

#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 node.
   String^ prefix = root->GetPrefixOfNamespace( "urn:samples" );
   XmlElement^ elem = doc->CreateElement( prefix, "style", "urn:samples" );
   elem->InnerText = "hardcover";
   
   //Add the node to the document.
   root->AppendChild( elem );
   Console::WriteLine( "Display the modified XML..." );
   doc->Save( Console::Out );
}

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 node.
    string prefix = root.GetPrefixOfNamespace("urn:samples");
    XmlElement elem = doc.CreateElement(prefix, "style", "urn:samples");
    elem.InnerText = "hardcover";

    //Add the node to the document.
    root.AppendChild(elem);

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

Option Strict
Option Explicit

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 node.
        Dim prefix As String = root.GetPrefixOfNamespace("urn:samples")
        Dim elem As XmlElement = doc.CreateElement(prefix, "style", "urn:samples")
        elem.InnerText = "hardcover"
        
        'Add the node to the document.
        root.AppendChild(elem)
        
        Console.WriteLine("Display the modified XML...")
        doc.Save(Console.Out)
    End Sub
End Class

Remarks

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