XmlAttribute.CloneNode(Boolean) 方法

定義

命名空間:

System.Xml

組件:

netstandard.dll, System.Xml.ReaderWriter.dll

來源:

XmlAttribute.cs

會建立這個節點的複製品。

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

參數

deep

Boolean

true 遞迴地複製指定節點下的子樹; false 只複製節點本身。

傳回

XmlNode

複製節點。

範例

以下範例使用 CloneNode 來為兩個不同元素節點添加屬性。

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

範例中使用檔案 2elems.xml，作為輸入。

<!--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>

備註

此方法作為節點的複製建構子。 被克隆的節點沒有父節點（ParentNode 回傳 null）。

複製未指定屬性會回傳指定屬性（Specified 回傳 true）。

另請參閱

• XmlElement