XmlAttribute.CloneNode(Boolean) Method

Reference

Definition

Namespace:: System.Xml

Assemblies:: System.Xml.dll, System.Xml.XmlDocument.dll

Assemblies:: netstandard.dll, System.Xml.ReaderWriter.dll

Assembly:: System.Xml.XmlDocument.dll

Assembly:: System.Xml.ReaderWriter.dll

Assembly:: System.Xml.dll

Assembly:: netstandard.dll

Source:: XmlAttribute.cs

Source:: XmlAttribute.cs

Source:: XmlAttribute.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Creates a duplicate of this node.

public:
 override System::Xml::XmlNode ^ CloneNode(bool deep);

public override System.Xml.XmlNode CloneNode(bool deep);

override this.CloneNode : bool -> System.Xml.XmlNode

Public Overrides Function CloneNode (deep As Boolean) As XmlNode

Parameters

deep: Boolean

true to recursively clone the subtree under the specified node; false to clone only the node itself.

Returns

XmlNode

The duplicate node.

Examples

The following example uses CloneNode to add an attribute to two different element nodes.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   
   //Create an XmlDocument.
   XmlDocument^ doc = gcnew XmlDocument;
   doc->Load( "2elems.xml" );
   
   //Create an attribute.
   XmlAttribute^ attr;
   attr = doc->CreateAttribute( "bk", "genre", "urn:samples" );
   attr->Value = "novel";
   
   //Add the attribute to the first book.
   XmlElement^ currNode = dynamic_cast<XmlElement^>(doc->DocumentElement->FirstChild);
   currNode->SetAttributeNode( attr );
   
   //An attribute cannot be added to two different elements.  
   //You must clone the attribute and add it to the second book.
   XmlAttribute^ attr2;
   attr2 = dynamic_cast<XmlAttribute^>(attr->CloneNode( true ));
   currNode = dynamic_cast<XmlElement^>(doc->DocumentElement->LastChild);
   currNode->SetAttributeNode( attr2 );
   Console::WriteLine( "Display the modified XML...\r\n" );
   XmlTextWriter^ writer = gcnew XmlTextWriter( Console::Out );
   writer->Formatting = Formatting::Indented;
   doc->WriteContentTo( writer );
}

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

public class Sample
{
  public static void Main()
  {
    //Create an XmlDocument.
    XmlDocument doc = new XmlDocument();
    doc.Load("2elems.xml");

    //Create an attribute.
    XmlAttribute attr;
    attr = doc.CreateAttribute("bk","genre","urn:samples");
    attr.Value = "novel";

    //Add the attribute to the first book.
    XmlElement currNode = (XmlElement) doc.DocumentElement.FirstChild;
    currNode.SetAttributeNode(attr);

    //An attribute cannot be added to two different elements.
    //You must clone the attribute and add it to the second book.
    XmlAttribute attr2;
    attr2 = (XmlAttribute) attr.CloneNode(true);
    currNode = (XmlElement) doc.DocumentElement.LastChild;
    currNode.SetAttributeNode(attr2);

    Console.WriteLine("Display the modified XML...\r\n");
    XmlTextWriter writer = new XmlTextWriter(Console.Out);
    writer.Formatting = Formatting.Indented;
    doc.WriteContentTo(writer);
  }
}

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()

    Dim doc as XmlDocument = new XmlDocument()
    doc.Load("2elems.xml")
 
    'Create an attribute.
    Dim attr as XmlAttribute 
    attr = doc.CreateAttribute("bk","genre","urn:samples")
    attr.Value = "novel"

    'Add the attribute to the first book.
    Dim currNode as XmlElement
    currNode = CType(doc.DocumentElement.FirstChild, XmlElement) 
    currNode.SetAttributeNode(attr)

    'An attribute cannot be added to two different elements.  
    'You must clone the attribute and add it to the second book.
    Dim attr2 as XmlAttribute 
    attr2 = CType (attr.CloneNode(true), XmlAttribute) 
    currNode = CType(doc.DocumentElement.LastChild, XmlElement) 
    currNode.SetAttributeNode(attr2)

    Console.WriteLine("Display the modified XML...")
    Dim writer as XmlTextWriter = new XmlTextWriter(Console.Out)
    writer.Formatting = Formatting.Indented
    doc.WriteContentTo(writer)

  end sub
end class

The example uses the file, 2elems.xml, as input.

XML


<!--sample XML fragment-->
<bookstore>
  <book ISBN='10-861003-324'>
    <title>The Handmaid's Tale</title>
    <price>19.95</price>
  </book>
  <book ISBN='1-861001-57-5'>
    <title>Pride And Prejudice</title>
    <price>24.95</price>
  </book>
</bookstore>

Remarks

This method serves as a copy constructor for nodes. The cloned node has no parent (ParentNode returns null).

Cloning an unspecified attribute returns a specified attribute (Specified returns true).

Applies to

Ürün	Sürümler
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1
UWP	10.0

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