XmlDocument.CreateComment(String) 方法

定义

创建包含指定数据的 XmlCommentCreates an XmlComment containing the specified data.

public:
 virtual System::Xml::XmlComment ^ CreateComment(System::String ^ data);
public virtual System.Xml.XmlComment CreateComment (string data);
public virtual System.Xml.XmlComment CreateComment (string? data);
abstract member CreateComment : string -> System.Xml.XmlComment
override this.CreateComment : string -> System.Xml.XmlComment
Public Overridable Function CreateComment (data As String) As XmlComment

参数

data
String

XmlComment 的内容。The content of the new XmlComment.

返回

XmlComment

新的 XmlCommentThe new XmlComment.

示例

下面的示例创建一个注释并将其添加到 XML 文档中。The following example creates a comment and adds it to an XML document.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book genre='novel' ISBN='1-861001-57-5'><title>Pride And Prejudice</title></book>" );
   
   //Create a comment.
   XmlComment^ newComment;
   newComment = doc->CreateComment( "Sample XML document" );
   
   //Add the new node to the document.
   XmlElement^ root = doc->DocumentElement;
   doc->InsertBefore( newComment, root );
   Console::WriteLine( "Display the modified XML..." );
   doc->Save( Console::Out );
}

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

public class Sample
{
  public static void Main()
  {
    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "</book>");

    //Create a comment.
    XmlComment newComment;
    newComment = doc.CreateComment("Sample XML document");

    //Add the new node to the document.
    XmlElement root = doc.DocumentElement;
    doc.InsertBefore(newComment, root);

    Console.WriteLine("Display the modified XML...");
    doc.Save(Console.Out);
  }
}
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 genre='novel' ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>"  & _
                    "</book>")
        
        'Create a comment.
        Dim newComment As XmlComment
        newComment = doc.CreateComment("Sample XML document")
        
        'Add the new node to the document.
        Dim root As XmlElement = doc.DocumentElement
        doc.InsertBefore(newComment, root)
        
        Console.WriteLine("Display the modified XML...")
        doc.Save(Console.Out)
    End Sub
End Class

注解

尽管此方法会在文档的上下文中创建新的对象,但它不会自动将新对象添加到文档树。Although this method creates the new object in the context of the document, it does not automatically add the new object to the document tree. 若要添加新的对象,则必须显式调用某个节点插入方法。To add the new object, you must explicitly call one of the node insert methods.

根据 W3C 可扩展标记语言 (XML) 1.0 建议,当 EntityReference 节点不是属性节点的子节点时,仅允许在文档、元素和 EntityReference 节点内使用注释节点。According to the W3C Extensible Markup Language (XML) 1.0 recommendation, Comment nodes are only allowed within Document, Element and EntityReference nodes, when the EntityReference node is not a child of an Attribute node.

适用于