XmlTextReader.WhitespaceHandling プロパティ

定義

名前空間:

System.Xml

アセンブリ:

System.Xml.ReaderWriter.dll

ソース:

XmlTextReader.cs

空白の処理方法を指定する値を取得または設定します。

public:
 property System::Xml::WhitespaceHandling WhitespaceHandling { System::Xml::WhitespaceHandling get(); void set(System::Xml::WhitespaceHandling value); };

public System.Xml.WhitespaceHandling WhitespaceHandling { get; set; }

member this.WhitespaceHandling : System.Xml.WhitespaceHandling with get, set

Public Property WhitespaceHandling As WhitespaceHandling

プロパティ値

WhitespaceHandling

WhitespaceHandling 値のいずれか 1 つ。 既定値は WhitespaceHandling.All で、Whitespace と SignificantWhitespace ノードを返します。

例外

ArgumentOutOfRangeException

無効な値を指定しています。

InvalidOperationException

リーダーが閉じているとき (ReadState が ReadState.Closed のとき) にこのプロパティを設定します。

例

次の例では、XML フラグメントを読み取ります。

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
void ReadXML( XmlParserContext^ context, String^ xmlFrag, WhitespaceHandling ws )
{
   
   //Create the reader and specify the WhitespaceHandling setting.
   XmlTextReader^ reader = gcnew XmlTextReader( xmlFrag,XmlNodeType::Element,context );
   reader->WhitespaceHandling = ws;
   
   //Parse the XML and display each of the nodes.
   while ( reader->Read() )
   {
      switch ( reader->NodeType )
      {
         case XmlNodeType::Element:
            Console::WriteLine( "{0}: <{1}>", reader->NodeType, reader->Name );
            break;

         case XmlNodeType::Text:
            Console::WriteLine( "{0}: {1}", reader->NodeType, reader->Value );
            break;

         case XmlNodeType::EndElement:
            Console::WriteLine( "{0}: </{1}>", reader->NodeType, reader->Name );
            break;

         case XmlNodeType::Whitespace:
            Console::WriteLine( "{0}:", reader->NodeType );
            break;

         case XmlNodeType::SignificantWhitespace:
            Console::WriteLine( "{0}:", reader->NodeType );
            break;
      }
   }

   
   //Close the reader.
   reader->Close();
}

int main()
{
   
   //Create the XML fragment to be parsed.
   String^ xmlFrag = "<book> "
   "  <title>Pride And Prejudice</title>"
   "  <genre>novel</genre>"
   "</book>";
   
   //Create the XmlNamespaceManager.
   NameTable^ nt = gcnew NameTable;
   XmlNamespaceManager^ nsmgr = gcnew XmlNamespaceManager( nt );
   
   //Create the XmlParserContext.
   XmlParserContext^ context = gcnew XmlParserContext( nullptr,nsmgr,nullptr,XmlSpace::Default );
   Console::WriteLine( "Read the XML and ignore all white space..." );
   ReadXML( context, xmlFrag, WhitespaceHandling::None );
   Console::WriteLine( "\r\nRead the XML including white space nodes..." );
   ReadXML( context, xmlFrag, WhitespaceHandling::All );
}

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

public class Sample
{
  public static void Main(){

    //Create the XML fragment to be parsed.
    string xmlFrag ="<book> " +
                    "  <title>Pride And Prejudice</title>" +
                    "  <genre>novel</genre>" +
                    "</book>";

    //Create the XmlNamespaceManager.
    NameTable nt = new NameTable();
    XmlNamespaceManager nsmgr = new XmlNamespaceManager(nt);

    //Create the XmlParserContext.
    XmlParserContext context = new XmlParserContext(null, nsmgr, null, XmlSpace.Default);

    Console.WriteLine("Read the XML and ignore all white space...");
    ReadXML(context, xmlFrag, WhitespaceHandling.None);

    Console.WriteLine("\r\nRead the XML including white space nodes...");
    ReadXML(context, xmlFrag, WhitespaceHandling.All);
  }

  public static void ReadXML(XmlParserContext context, string xmlFrag, WhitespaceHandling ws){

    //Create the reader and specify the WhitespaceHandling setting.
    XmlTextReader reader = new XmlTextReader(xmlFrag, XmlNodeType.Element, context);
    reader.WhitespaceHandling = ws;

      //Parse the XML and display each of the nodes.
      while (reader.Read())
      {
         switch (reader.NodeType)
         {
           case XmlNodeType.Element:
             Console.WriteLine("{0}: <{1}>", reader.NodeType, reader.Name);
             break;
           case XmlNodeType.Text:
             Console.WriteLine("{0}: {1}", reader.NodeType, reader.Value);
             break;
           case XmlNodeType.EndElement:
             Console.WriteLine("{0}: </{1}>", reader.NodeType, reader.Name);
             break;
           case XmlNodeType.Whitespace:
             Console.WriteLine("{0}:", reader.NodeType);
             break;
           case XmlNodeType.SignificantWhitespace:
             Console.WriteLine("{0}:", reader.NodeType);
             break;
         }
      }

    //Close the reader.
    reader.Close();
  }
} // End class

Imports System.IO
Imports System.Xml

public class Sample 

  public shared sub Main()

    'Create the XML fragment to be parsed.
    Dim xmlFrag as string ="<book> " & _
                           "  <title>Pride And Prejudice</title>" & _
                           "  <genre>novel</genre>" & _
                           "</book>" 

    'Create the XmlNamespaceManager.
    Dim nt as NameTable = new NameTable()
    Dim nsmgr as XmlNamespaceManager = new XmlNamespaceManager(nt)

    'Create the XmlParserContext.
    Dim context as XmlParserContext = new XmlParserContext(nothing, nsmgr, nothing, XmlSpace.Default)

    Console.WriteLine("Read the XML and ignore all white space...")
    ReadXML(context, xmlFrag, WhitespaceHandling.None)

    Console.WriteLine()
    Console.WriteLine("Read the XML including white space nodes...")
    ReadXML(context, xmlFrag, WhitespaceHandling.All)
  end sub
  
  public shared sub ReadXML(context as XmlParserContext, xmlFrag as string, ws as WhitespaceHandling)

    'Create the reader and specify the WhitespaceHandling setting.
    Dim reader as XmlTextReader = new XmlTextReader(xmlFrag, XmlNodeType.Element, context)
    reader.WhitespaceHandling = ws

      'Parse the XML and display each of the nodes.
      while (reader.Read())
         select case reader.NodeType
           case XmlNodeType.Element:
             Console.WriteLine("{0}: <{1}>", reader.NodeType, reader.Name)
           case XmlNodeType.Text:
             Console.WriteLine("{0}: {1}", reader.NodeType, reader.Value)
           case XmlNodeType.EndElement:
             Console.WriteLine("{0}: </{1}>", reader.NodeType, reader.Name)
           case XmlNodeType.Whitespace:
             Console.WriteLine("{0}:", reader.NodeType)
           case XmlNodeType.SignificantWhitespace:
             Console.WriteLine("{0}:", reader.NodeType)
         end select       
      end while           
  
    'Close the reader.
    reader.Close()     
  
  end sub
end class

注釈

注意

.NET Framework 2.0 以降では、 メソッドを使用してXmlReader.Create新しい機能を利用してインスタンスを作成XmlReaderすることをお勧めします。

このプロパティはいつでも変更でき、次の読み取り操作で有効になります。

には XmlTextReader DTD 情報がないため、 SignificantWhitespace ノードはスコープ内 xml:space='preserve' でのみ返されます。

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• XmlReader