通过

XmlNode.HasChildNodes 属性

定义

命名空间:
System.Xml
程序集:
System.Xml.dll, System.Xml.XmlDocument.dll
程序集:
netstandard.dll, System.Xml.ReaderWriter.dll
程序集:
System.Xml.XmlDocument.dll
程序集:
System.Xml.ReaderWriter.dll
程序集:
System.Xml.dll
程序集:
netstandard.dll
Source:
XmlNode.cs
Source:
XmlNode.cs
Source:
XmlNode.cs
Source:
XmlNode.cs

获取一个值，该值指示此节点是否有任何子节点。

public:
 virtual property bool HasChildNodes { bool get(); };
public virtual bool HasChildNodes { get; }
member this.HasChildNodes : bool
Public Overridable ReadOnly Property HasChildNodes As Boolean

属性值

Boolean

如果该节点具有子节点，则为 true；否则为 false。

示例

以下示例显示根元素的所有子节点。

using System;
using System.Xml;

public class Sample2
{
    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;

        //Display the contents of the child nodes.
        if (root.HasChildNodes)
        {
            for (int i = 0; i < root.ChildNodes.Count; i++)
            {
                Console.WriteLine(root.ChildNodes[i].InnerText);
            }
        }
    }
}

Option Strict
Option Explicit

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
        
        'Display the contents of the child nodes.
        If root.HasChildNodes Then
            Dim i As Integer
            For i = 0 To root.ChildNodes.Count - 1
                Console.WriteLine(root.ChildNodes(i).InnerText)
            Next i
        End If
    End Sub
End Class

注解

有关子节点的信息，请参阅 W3C DOM (Core) Level 1 规范

适用于