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XmlDocument.CreateElement Method (String, String, String)

Creates an element with the specified Prefix, LocalName, and NamespaceURI.

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

public virtual XmlElement CreateElement(
	string prefix,
	string localName,
	string namespaceURI
)

Parameters

prefix
Type: System.String

The prefix of the new element (if any). String.Empty and null are equivalent.

localName
Type: System.String

The local name of the new element.

namespaceURI
Type: System.String

The namespace URI of the new element (if any). String.Empty and null are equivalent.

Return Value

Type: System.Xml.XmlElement
The new XmlElement.

The following C# code

 XmlElement elem;
 elem=doc.CreateElement("xy", "item", "urn:abc");

creates an element equivalent to the following XML text:

<xy:item xmlns:xy="urn:abc"/>

Although this method creates the new object in the context of the document, it does not automatically add the new object to the document tree. To add the new object, you must explicitly call one of the node insert methods.

According to the W3C Extensible Markup Language (XML) 1.0 recommendation (www.w3.org/TR/1998/REC-xml-19980210), Element nodes are allowed within Document and Element nodes, and in EntityReference nodes when the EntityReference is outside an Attribute node.

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

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

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

public class Sample {

  public static void Main() {

    // Create the XmlDocument.
    XmlDocument doc = new XmlDocument();
    string xmlData = "<book xmlns:bk='urn:samples'></book>";

    doc.Load(new StringReader(xmlData));

    // Create a new element and add it to the document.
    XmlElement elem = doc.CreateElement("bk", "genre", "urn:samples");
    elem.InnerText = "fantasy";
    doc.DocumentElement.AppendChild(elem);

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

  }
}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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