XmlNode.FirstChild 屬性

定義

命名空間:

System.Xml

組件:

System.Xml.dll, System.Xml.XmlDocument.dll

組件:

System.Xml.ReaderWriter.dll

組件:

System.Xml.XmlDocument.dll

組件:

System.Xml.dll

組件:

netstandard.dll

取得節點的第一個子節點。

public:
 virtual property System::Xml::XmlNode ^ FirstChild { System::Xml::XmlNode ^ get(); };

public virtual System.Xml.XmlNode FirstChild { get; }

public virtual System.Xml.XmlNode? FirstChild { get; }

member this.FirstChild : System.Xml.XmlNode

Public Overridable ReadOnly Property FirstChild As XmlNode

屬性值

XmlNode

節點的第一個子節點。 如果沒有這種節點，則會傳回 null。

範例

下列範例會顯示 title 元素。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book ISBN='1-861001-57-5'>"
   "<title>Pride And Prejudice</title>"
   "<price>19.95</price>"
   "</book>" );
   XmlNode^ root = doc->FirstChild;
   Console::WriteLine( "Display the title element..." );
   Console::WriteLine( root->FirstChild->OuterXml );
}

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

public class Sample {

  public static void Main() {

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "<price>19.95</price>" +
                "</book>");

    XmlNode root = doc.FirstChild;

    Console.WriteLine("Display the title element...");
    Console.WriteLine(root.FirstChild.OuterXml);
  }
}

Option Explicit
Option Strict

Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        
        Dim doc As New XmlDocument()
        doc.LoadXml("<book ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>" & _
                    "<price>19.95</price>" & _
                    "</book>")
        
        Dim root As XmlNode = doc.FirstChild
        
        Console.WriteLine("Display the title element...")
        Console.WriteLine(root.FirstChild.OuterXml)
    End Sub
End Class

備註

如需子節點的相關資訊，請參閱 W3C DOM (Core) 層級 1 規格