XmlNodeReader.ReadString メソッドとは? わかりやすく解説

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XmlNodeReader.ReadString メソッド

要素ノードまたはテキスト ノード内容文字列として読み取ります。

名前空間: System.Xml
アセンブリ: System.Xml (system.xml.dll 内)
構文構文

解説解説
使用例使用例

各要素テキストの内容表示する例を次に示します

Option Strict
Option Explicit

Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        Dim reader As XmlNodeReader = Nothing
        
        Try
            'Create and load the XML document.
            Dim doc As New
 XmlDocument()
            doc.LoadXml("<book>" & _
                        "<title>Pride And Prejudice</title>"
 & _
                        "<price>19.95</price>"
 & _
                        "<misc/>" & _
                        "</book>")
            
            'Load the XmlNodeReader 
            reader = New XmlNodeReader(doc)
            
            'Parse the XML and display the text content of each of the
 elements.
            While reader.Read()
                If reader.IsStartElement() Then
                    If reader.IsEmptyElement Then
                        Console.WriteLine("<{0}/>",
 reader.Name)
                    Else
                        Console.Write("<{0}> ",
 reader.Name)
                        reader.Read() 'Read the start tag.
                        If (reader.IsStartElement())  'Handle
 nested elements.
                          Console.WriteLine()
                          Console.Write("<{0}>",
 reader.Name)
                        End If
                        Console.WriteLine(reader.ReadString()) 'Read
 the text content of the element.
                    End If
                End If
            End While
        Finally
            If Not (reader Is
 Nothing) Then
                reader.Close()
            End If
        End Try
    End Sub 'Main 
End Class 'Sample
using System;
using System.IO;
using System.Xml;

public class Sample 
{
  public static void Main()
  {
    XmlNodeReader reader = null;

    try
    {
       //Create and load the XML document.
       XmlDocument doc = new XmlDocument();
       doc.LoadXml("<book>" +
                   "<title>Pride And Prejudice</title>" +
                   "<price>19.95</price>" +
                   "<misc/>" +
                   "</book>"); 

       //Load the XmlNodeReader 
       reader = new XmlNodeReader(doc);
  
       //Parse the XML and display the text content of each of the elements.
       while (reader.Read()){
         if (reader.IsStartElement()){
           if (reader.IsEmptyElement)
              Console.WriteLine("<{0}/>", reader.Name);
           else{
               Console.Write("<{0}> ", reader.Name);
               reader.Read(); //Read the start tag.
               if (reader.IsStartElement())  //Handle
 nested elements.
                   Console.Write("\r\n<{0}>", reader.Name);
               Console.WriteLine(reader.ReadString());  //Read the text
 content of the element.
           }
         }
       } 
       
     } 

     finally 
     {
        if (reader != null)
          reader.Close();
      }
  }
  
} // End class
#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlNodeReader^ reader = nullptr;
   try
   {
      
      //Create and load the XML document.
      XmlDocument^ doc = gcnew XmlDocument;
      doc->LoadXml( "<book>"
      "<title>Pride And Prejudice</title>"
      "<price>19.95</price>"
      "<misc/>"
      "</book>" );
      
      //Load the XmlNodeReader 
      reader = gcnew XmlNodeReader( doc );
      
      //Parse the XML and display the text content of each of the elements.
      while ( reader->Read() )
      {
         if ( reader->IsStartElement() )
         {
            if ( reader->IsEmptyElement )
                        Console::WriteLine( "<{0}/>", reader->Name
 );
            else
            {
               Console::Write( "<{0}> ", reader->Name );
               reader->Read(); //Read the start tag.
               if ( reader->IsStartElement() )
                              
               //Handle nested elements.
               Console::Write( "\r\n<{0}>", reader->Name );
               Console::WriteLine( reader->ReadString() ); //Read
 the text content of the element.
            }
         }
      }
   }
   finally
   {
      if ( reader != nullptr )
            reader->Close();
   }

}

import System.*;
import System.IO.*;
import System.Xml.*;

public class Sample
{
    public static void main(String[]
 args)
    {
        XmlNodeReader reader = null;
        try {
            //Create and load the XML document.
            XmlDocument doc = new XmlDocument();
            doc.LoadXml("<book>"
                + "<title>Pride And Prejudice</title>"
                + "<price>19.95</price>"
                + "<misc/>" 
                + "</book>");

            //Load the XmlNodeReader 
            reader = new XmlNodeReader(doc);

            // Parse the XML and display the text content of 
            // each of the elements.
            while (reader.Read()) {
                if (reader.IsStartElement()) {
                    if (reader.get_IsEmptyElement()) {
                        Console.WriteLine("<{0}/>", reader.get_Name());
                    }
                    else {
                        Console.Write("<{0}> ", reader.get_Name());
                        //Read the start tag.
                        reader.Read(); 
                        //Handle nested elements.
                        if (reader.IsStartElement()) { 
                            Console.Write("\r\n<{0}>", reader.get_Name());
                        }
                        //Read the text content of the element.
                        Console.WriteLine(reader.ReadString()); 
                    }
                }
            }
        }     
        finally {
            if (reader != null) {
                reader.Close();
         }
      }
    } //main
} // End class Sample
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