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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.

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

Parameters

prefix
Prefix whose namespace URI you want to find.

Return Value

The namespace URI of the specified prefix.

Remarks

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

Example

[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>" & _
                    "</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

[C#] 
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);

  }
}

[C++] 
#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>" 
                 S"</book>");

    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.
    root->Attributes->SetNamedItem(attr);

    Console::WriteLine(S"Display the modified XML...");
    doc->Save(Console::Out);

}

[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.

Requirements

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