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XmlElement.SetAttribute Method (String, String)

Sets the value of the attribute with the specified name.

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

public virtual void SetAttribute (
	string name,
	string value
)
public void SetAttribute (
	String name, 
	String value
)
public function SetAttribute (
	name : String, 
	value : String
)

Parameters

name

The name of the attribute to create or alter. This is a qualified name. If the name contains a colon it is parsed into prefix and local name components.

value

The value to set for the attribute.

Exception typeCondition

XmlException

The specified name contains an invalid character.

ArgumentException

The node is read-only.

If an attribute with the same name is already present in the element, its value is changed to that of value. value is a simple string. It is not parsed as it is being set. Any markup, such as syntax to be recognized as an entity reference, is treated as literal text and needs to be properly escaped by the implementation when it is written out. In order to assign an attribute value that contains entity references, the user must create an XmlAttribute node plus any XmlText and XmlEntityReference nodes, build the appropriate subtree and use SetAttributeNode to assign it as the value of an attribute.

The following example adds an attribute to an element.

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;

    // Add a new attribute.
    root.SetAttribute("genre", "novel");

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

  }
}

import System.*;
import System.IO.*;
import System.Xml.*;

public class Sample
{
    public static void main(String[] args)
    {
        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.get_DocumentElement();

        // Add a new attribute.
        root.SetAttribute("genre", "novel");
        Console.WriteLine("Display the modified XML...");
        Console.WriteLine(doc.get_InnerXml());
    } //main 
} //Sample

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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