XmlEntityReference.IsReadOnly 属性

定义

命名空间:

System.Xml

程序集:

System.Xml.ReaderWriter.dll

程序集:

System.Xml.dll

程序集:

netstandard.dll

获取指示节点是否只读的值。

public:
 virtual property bool IsReadOnly { bool get(); };

public override bool IsReadOnly { get; }

member this.IsReadOnly : bool

Public Overrides ReadOnly Property IsReadOnly As Boolean

属性值

Boolean

如果节点是只读的，则为 true；否则为 false。

由于 XmlEntityReference 节点为只读，该属性总是返回 true。

示例

下面的示例演示如何使用 IsReadOnly 属性。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   
   //Create the XmlDocument.
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<!DOCTYPE book [<!ENTITY h 'hardcover'>]>"
   "<book genre='novel' ISBN='1-861001-57-5'>"
   "<title>Pride And Prejudice</title>"
   "<style>&h;</style>"
   "</book>" );
   
   // Check if the node is read-only.
   XmlEntityReference^ entref = dynamic_cast<XmlEntityReference^>(doc->DocumentElement->LastChild->FirstChild);
   if ( entref->IsReadOnly )
      Console::WriteLine( "Entity reference nodes are always read-only" );
}

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

public class Sample
{
  public static void Main()
  {
    //Create the XmlDocument.
    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" +
                "<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "<style>&h;</style>" +
                "</book>");

    // Determine whether the node is read-only.
    XmlEntityReference entref = (XmlEntityReference) doc.DocumentElement.LastChild.FirstChild;
    if (entref.IsReadOnly)
       Console.WriteLine("Entity reference nodes are always read-only");
  }
}

Option Explicit
Option Strict

Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        'Create the XmlDocument.
        Dim doc As New XmlDocument()
        doc.LoadXml("<!DOCTYPE book [<!ENTITY h 'hardcover'>]>" & _
                    "<book genre='novel' ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>" & _
                    "<style>&h;</style>" & _
                    "</book>")
        
        ' Determine whether the node is read-only.
        Dim entref As XmlEntityReference = CType(doc.DocumentElement.LastChild.FirstChild, XmlEntityReference)
        If entref.IsReadOnly Then
            Console.WriteLine("Entity reference nodes are always read-only")
        End If
    End Sub
End Class

注解

只读节点是无法更改其属性、属性或子节点的节点。 但是，可以从树中删除只读节点，并将其插入到其他位置。

此属性是文档对象模型 (DOM) 的 Microsoft 扩展。