XmlElement.RemoveAttribute Method

Definition

Namespace:

System.Xml

Assembly:

System.Xml.ReaderWriter.dll

Removes the specified attribute. (If the removed attribute has a default value, it is immediately replaced).

Overloads

RemoveAttribute(String)	Removes an attribute by name.
RemoveAttribute(String, String)	Removes an attribute with the specified local name and namespace URI. (If the removed attribute has a default value, it is immediately replaced).

RemoveAttribute(String)

Source:

XmlElement.cs

Removes an attribute by name.

public:
 virtual void RemoveAttribute(System::String ^ name);

public virtual void RemoveAttribute (string name);

abstract member RemoveAttribute : string -> unit
override this.RemoveAttribute : string -> unit

Public Overridable Sub RemoveAttribute (name As String)

Parameters

name

String

The name of the attribute to remove. This is a qualified name. It is matched against the Name property of the matching node.

Exceptions

ArgumentException

The node is read-only.

Examples

The following example removes an attribute from an element.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book genre='novel' ISBN='1-861001-57-5'><title>Pride And Prejudice</title></book>" );
   XmlElement^ root = doc->DocumentElement;
   
   // Remove the genre attribute.
   root->RemoveAttribute( "genre" );
   Console::WriteLine( "Display the modified XML..." );
   Console::WriteLine( doc->InnerXml );
}

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

public class Sample
{
  public static void Main()
  {

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "</book>");

    XmlElement root = doc.DocumentElement;

    // Remove the genre attribute.
    root.RemoveAttribute("genre");

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

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()

    Dim doc as XmlDocument = new XmlDocument()
    doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" & _
                "<title>Pride And Prejudice</title>" & _
                "</book>")      

    Dim root as XmlElement = doc.DocumentElement

    ' Remove the genre attribute.
    root.RemoveAttribute("genre")

    Console.WriteLine("Display the modified XML...")
    Console.WriteLine(doc.InnerXml)

  end sub
end class

Remarks

If the removed attribute is known to have a default value, an attribute immediately appears containing the default value and, if applicable, the corresponding namespace URI, local name, and prefix.

RemoveAttribute(String, String)

Source:

XmlElement.cs

Removes an attribute with the specified local name and namespace URI. (If the removed attribute has a default value, it is immediately replaced).

public:
 virtual void RemoveAttribute(System::String ^ localName, System::String ^ namespaceURI);

public virtual void RemoveAttribute (string localName, string? namespaceURI);

abstract member RemoveAttribute : string * string -> unit
override this.RemoveAttribute : string * string -> unit

Public Overridable Sub RemoveAttribute (localName As String, namespaceURI As String)

Parameters

localName

String

The local name of the attribute to remove.

namespaceURI

String

The namespace URI of the attribute to remove.

Exceptions

ArgumentException

The node is read-only.

Examples

The following example removes an attribute from an element.

#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>" );
   XmlElement^ root = doc->DocumentElement;
   
   // Remove the ISBN attribute.
   root->RemoveAttribute( "ISBN", "urn:samples" );
   Console::WriteLine( "Display the modified XML..." );
   Console::WriteLine( doc->InnerXml );
}

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>");

    XmlElement root = doc.DocumentElement;

    // Remove the ISBN attribute.
    root.RemoveAttribute("ISBN", "urn:samples");

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

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()

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

    Dim root as XmlElement = doc.DocumentElement

    ' Remove the ISBN attribute.
    root.RemoveAttribute("ISBN", "urn:samples")
    
    Console.WriteLine("Display the modified XML...")
    Console.WriteLine(doc.InnerXml)

  end sub
end class

Remarks

If the removed attribute is known to have a default value, an attribute immediately appears containing the default value and, if applicable, the corresponding namespace URI, local name, and prefix.