.NET Framework Class Library
XmlTextReader..::.Prefix Property

Gets the namespace prefix associated with the current node.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)
Syntax
Visual Basic (Declaration) 
Public Overrides ReadOnly Property Prefix As String
Visual Basic (Usage) 
Dim instance As XmlTextReader
Dim value As String

value = instance.Prefix
C# 
public override string Prefix { get; }
Visual C++ 
public:
virtual property String^ Prefix {
    String^ get () override;
}
JScript 
public override function get Prefix () : String

Property Value

Type: System..::.String
The namespace prefix associated with the current node.
Remarks
NoteNote:

In the .NET Framework version 2.0 release, the recommended practice is to create XmlReader instances using the XmlReader..::.Create method. This allows you to take full advantage of the new features introduced in this release. For more information, see Creating XML Readers.
Examples

The following example displays the local name of each node, and, if they exist, the prefix and namespace URI.

Visual Basic 
Imports System
Imports System.IO
Imports System.Xml

Public Class Sample

    Public Shared Sub Main()
        Dim reader As XmlTextReader = Nothing

        Try
            ' Load the reader with the XML file.
            reader = New XmlTextReader("book2.xml")

            ' Parse the file.  If they exist, display the prefix and 
            ' namespace URI of each node.
            While reader.Read()
                If reader.IsStartElement() Then
                    If reader.Prefix = String.Empty Then
                        Console.WriteLine("<{0}>", reader.LocalName)
                    Else
                        Console.Write("<{0}:{1}>", reader.Prefix, reader.LocalName)
                        Console.WriteLine(" The namespace URI is " & reader.NamespaceURI)
                    End If
                End If
            End While

        Finally
            If Not (reader Is Nothing) Then
                reader.Close()
            End If
        End Try
    End Sub 'Main 
End Class 'Sample
C# 
using System;
using System.IO;
using System.Xml;

public class Sample {

  public static void Main() {

    XmlTextReader reader = null;

    try {

       // Load the reader with the XML file.
       reader = new XmlTextReader("book2.xml");

       // Parse the file.  If they exist, display the prefix and 
       // namespace URI of each node.
       while (reader.Read()) {
         if (reader.IsStartElement()) {
           if (reader.Prefix==String.Empty)
              Console.WriteLine("<{0}>", reader.LocalName);
           else {
               Console.Write("<{0}:{1}>", reader.Prefix, reader.LocalName);
               Console.WriteLine(" The namespace URI is " + reader.NamespaceURI);
           }
         }
       }       

     } 
     finally {
        if (reader != null)
          reader.Close();
      }
  }  
} // End class
Visual C++ 
#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlTextReader^ reader = nullptr;
   try
   {

      // Load the reader with the XML file.
      reader = gcnew XmlTextReader( "book2.xml" );

      // Parse the file.  If they exist, display the prefix and 
      // namespace URI of each node.
      while ( reader->Read() )
      {
         if ( reader->IsStartElement() )
         {
            if ( reader->Prefix == String::Empty )
                        Console::WriteLine( "<{0}>", reader->LocalName );
            else
            {
               Console::Write( "<{0}:{1}>", reader->Prefix, reader->LocalName );
               Console::WriteLine( " The namespace URI is {0}", reader->NamespaceURI );
            }
         }
      }
   }
   finally
   {
      if ( reader != nullptr )
            reader->Close();
   }

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

int main() {

   XmlTextReader* reader = 0;

   try {

      // Load the reader with the XML file.
      reader = new XmlTextReader(S"book2.xml");

      // Parse the file.  If they exist, display the prefix and 
      // namespace URI of each node.
      while (reader->Read()) {
         if (reader->IsStartElement()) {
            if (reader->Prefix==String::Empty)
               Console::WriteLine(S"<{0}>", reader->LocalName);
            else {
               Console::Write(S"<{0}:{1}>", reader->Prefix, reader->LocalName);
               Console::WriteLine(S" The namespace URI is {0}", reader->NamespaceURI);
            }
         }
      }       

   } 
   __finally {
      if (reader != 0)
         reader->Close();
   }
}

The example uses the file, book2.xml, as input.

None 
<book xmlns:bk='urn:samples'>
  <title>Pride And Prejudice</title>
  <bk:genre>novel</bk:genre>
</book>
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
See Also

Reference

XmlTextReader Class
XmlTextReader Members
System.Xml Namespace

Other Resources

Reading XML with the XmlReader
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