XmlNode.GetNamespaceOfPrefix(String) 方法

定义

查找当前节点范围内离给定的前缀最近的 xmlns 声明,并返回声明中的命名空间 URI。Looks up the closest xmlns declaration for the given prefix that is in scope for the current node and returns the namespace URI in the declaration.

public:
 virtual System::String ^ GetNamespaceOfPrefix(System::String ^ prefix);
public virtual string GetNamespaceOfPrefix (string prefix);
abstract member GetNamespaceOfPrefix : string -> string
override this.GetNamespaceOfPrefix : string -> string
Public Overridable Function GetNamespaceOfPrefix (prefix As String) As String

参数

prefix
String

你想查找的命名空间 URI 的前缀。The prefix whose namespace URI you want to find.

返回

String

指定前缀的命名空间 URI。The namespace URI of the specified prefix.

示例

下面的示例将新特性添加到 XML 文档中。The following example adds a new attribute to the 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 xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>"
   "<title>Pride And Prejudice</title>"
   "</book>" );
   XmlNode^ root = doc->FirstChild;
   
   //Create a new attribute.
   String^ ns = root->GetNamespaceOfPrefix( "bk" );
   XmlNode^ attr = doc->CreateNode( XmlNodeType::Attribute, "genre", ns );
   attr->Value = "novel";
   
   //Add the attribute to the document.
   root->Attributes->SetNamedItem( attr );
   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 xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "</book>");

    XmlNode root = doc.FirstChild;

    //Create a new attribute.
    string ns = root.GetNamespaceOfPrefix("bk");
    XmlNode attr = doc.CreateNode(XmlNodeType.Attribute, "genre", ns);
    attr.Value = "novel";

    //Add the attribute to the document.
    root.Attributes.SetNamedItem(attr);

    Console.WriteLine("Display the modified XML...");
    doc.Save(Console.Out);
  }
}
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 xmlns:bk='urn:samples' bk:ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>" & _
                    "</book>")
        
        Dim root As XmlNode = doc.FirstChild
        
        'Create a new attribute.
        Dim ns As String = root.GetNamespaceOfPrefix("bk")
        Dim attr As XmlNode = doc.CreateNode(XmlNodeType.Attribute, "genre", ns)
        attr.Value = "novel"
        
        'Add the attribute to the document.
        root.Attributes.SetNamedItem(attr)
        
        Console.WriteLine("Display the modified XML...")
        doc.Save(Console.Out)
    End Sub
End Class

注解

此方法是文档对象模型 (DOM) 的 Microsoft 扩展。This method is a Microsoft extension to the Document Object Model (DOM).

适用于