Encoding.WebName Propriété

Définition

En cas de substitution dans une classe dérivée, obtient le nom inscrit auprès de l'IANA (Internet Assigned Numbers Authority) pour l'encodage actuel.

public:
 virtual property System::String ^ WebName { System::String ^ get(); };
public virtual string WebName { get; }
member this.WebName : string
Public Overridable ReadOnly Property WebName As String

Valeur de propriété

String

Nom IANA pour le Encoding actuel.

Exemples

L’exemple suivant comprend le WebName dans un en-tête html.

#using <System.dll>
#using <System.Web.dll>

using namespace System;
using namespace System::IO;
using namespace System::Text;
using namespace System::Web;
int main()
{
   
   // Use UTF8 encoding.
   Encoding^ encoding = Encoding::UTF8;
   StreamWriter^ writer = gcnew StreamWriter( "Encoding.html",false,encoding );
   writer->WriteLine( "<html><head>" );
   
   // Write charset attribute to the html file.
   // writer -> WriteLine(S"<META HTTP-EQUIV=\"Content-Type\S" CONTENT=\"text/html; charset=S {0}", encoding.WebName +"\S">");
   writer->WriteLine( String::Concat( "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=", encoding->WebName, "\">" ) );
   writer->WriteLine( "</head><body>" );
   writer->WriteLine( "<p>{0}</p>", HttpUtility::HtmlEncode( encoding->EncodingName ) );
   writer->WriteLine( "</body></html>" );
   writer->Flush();
   writer->Close();
}

/*
This code produces the following output in an HTML file.

<html><head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
</head><body>
<p>Unicode (UTF-8)</p>
</body></html>

*/
using System;
using System.IO;
using System.Text;
using System.Web;

namespace WebNameExample 
{
   public class ExampleClass 
   {
      public static void Main(string[] args) 
      {
         // Use UTF8 encoding.
     Encoding encoding = Encoding.UTF8;
     StreamWriter writer = new StreamWriter("Encoding.html", false, encoding);
            
     writer.WriteLine("<html><head>");

     // Write charset attribute to the html file.
     // The value of charset is returned by the WebName property.
     writer.WriteLine("<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=" +
                           encoding.WebName +"\">");
    
         writer.WriteLine("</head><body>");
     writer.WriteLine("<p>" + HttpUtility.HtmlEncode(encoding.EncodingName) + "</p>");
     writer.WriteLine("</body></html>");
     writer.Flush();
     writer.Close();
      }
   }
}

/*
This code produces the following output in an HTML file.

<html><head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=utf-8">
</head><body>
<p>Unicode (UTF-8)</p>
</body></html>

*/
Imports System.IO
Imports System.Text
Imports System.Web

Namespace WebNameExample
   Public Class ExampleClass
      
      Public Overloads Shared Sub Main()
         ' Use UTF8 encoding.
         Dim encoding As Encoding = Encoding.UTF8
         Dim writer As New StreamWriter("Encoding.html", False, encoding)
         
         writer.WriteLine("<html><head>")
         
         ' Write charset attribute to the html file.
         writer.Write("<META HTTP-EQUIV=""Content-Type"" CONTENT=""text/html;")
         writer.WriteLine(" charset=" + encoding.WebName + """>")
         
         writer.WriteLine("</head><body>")
         writer.WriteLine("<p>" + HttpUtility.HtmlEncode(encoding.EncodingName) + "</p>")
         writer.WriteLine("</body></html>")
         writer.Flush()
         writer.Close()
      End Sub
   End Class
End Namespace

'This code produces the following output in an HTML file.
'<html><head>
'<META HTTP-EQUIV="Content-Type" CONTENT="text/html; 'charset=utf-8">
'</head><body>
'<p>Unicode (UTF-8)</p>
'</body></html>
'

L’exemple suivant récupère les différents noms pour chaque encodage et affiche les encodages avec un ou plusieurs noms qui sont différents de EncodingInfo.Name . Il affiche, EncodingName mais n’effectue pas de comparaison par rapport à celui-ci.

using namespace System;
using namespace System::Text;
int main()
{
   
   // Print the header.
   Console::Write( "Name               " );
   Console::Write( "CodePage  " );
   Console::Write( "BodyName           " );
   Console::Write( "HeaderName         " );
   Console::Write( "WebName            " );
   Console::WriteLine( "Encoding.EncodingName" );
   
   // For every encoding, compare the name properties with EncodingInfo.Name.
   // Display only the encodings that have one or more different names.
   System::Collections::IEnumerator^ myEnum = Encoding::GetEncodings()->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      EncodingInfo ^ ei = safe_cast<EncodingInfo ^>(myEnum->Current);
      Encoding^ e = ei->GetEncoding();
      if (  !ei->Name->Equals( e->BodyName ) ||  !ei->Name->Equals( e->HeaderName ) ||  !ei->Name->Equals( e->WebName ) )
      {
         Console::Write( "{0,-18} ", ei->Name );
         Console::Write( "{0,-9} ", e->CodePage );
         Console::Write( "{0,-18} ", e->BodyName );
         Console::Write( "{0,-18} ", e->HeaderName );
         Console::Write( "{0,-18} ", e->WebName );
         Console::WriteLine( "{0} ", e->EncodingName );
      }
   }
}

/* 
This code produces the following output.

Name               CodePage  BodyName           HeaderName         WebName            Encoding.EncodingName
shift_jis          932       iso-2022-jp        iso-2022-jp        shift_jis          Japanese (Shift-JIS)
windows-1250       1250      iso-8859-2         windows-1250       windows-1250       Central European (Windows)
windows-1251       1251      koi8-r             windows-1251       windows-1251       Cyrillic (Windows)
Windows-1252       1252      iso-8859-1         Windows-1252       Windows-1252       Western European (Windows)
windows-1253       1253      iso-8859-7         windows-1253       windows-1253       Greek (Windows)
windows-1254       1254      iso-8859-9         windows-1254       windows-1254       Turkish (Windows)
csISO2022JP        50221     iso-2022-jp        iso-2022-jp        csISO2022JP        Japanese (JIS-Allow 1 byte Kana)
iso-2022-kr        50225     iso-2022-kr        euc-kr             iso-2022-kr        Korean (ISO)

*/
using System;
using System.Text;

public class SamplesEncoding  {

   public static void Main()  {

      // Print the header.
      Console.Write( "Name               " );
      Console.Write( "CodePage  " );
      Console.Write( "BodyName           " );
      Console.Write( "HeaderName         " );
      Console.Write( "WebName            " );
      Console.WriteLine( "Encoding.EncodingName" );

      // For every encoding, compare the name properties with EncodingInfo.Name.
      // Display only the encodings that have one or more different names.
      foreach( EncodingInfo ei in Encoding.GetEncodings() )  {
         Encoding e = ei.GetEncoding();

         if (( ei.Name != e.BodyName ) || ( ei.Name != e.HeaderName ) || ( ei.Name != e.WebName ))  {
            Console.Write( "{0,-18} ", ei.Name );
            Console.Write( "{0,-9} ",  e.CodePage );
            Console.Write( "{0,-18} ", e.BodyName );
            Console.Write( "{0,-18} ", e.HeaderName );
            Console.Write( "{0,-18} ", e.WebName );
            Console.WriteLine( "{0} ", e.EncodingName );
         }
      }
   }
}


/* 
This code produces the following output.

Name               CodePage  BodyName           HeaderName         WebName            Encoding.EncodingName
shift_jis          932       iso-2022-jp        iso-2022-jp        shift_jis          Japanese (Shift-JIS)
windows-1250       1250      iso-8859-2         windows-1250       windows-1250       Central European (Windows)
windows-1251       1251      koi8-r             windows-1251       windows-1251       Cyrillic (Windows)
Windows-1252       1252      iso-8859-1         Windows-1252       Windows-1252       Western European (Windows)
windows-1253       1253      iso-8859-7         windows-1253       windows-1253       Greek (Windows)
windows-1254       1254      iso-8859-9         windows-1254       windows-1254       Turkish (Windows)
csISO2022JP        50221     iso-2022-jp        iso-2022-jp        csISO2022JP        Japanese (JIS-Allow 1 byte Kana)
iso-2022-kr        50225     iso-2022-kr        euc-kr             iso-2022-kr        Korean (ISO)

*/
Imports System.Text

Public Class SamplesEncoding   

   Public Shared Sub Main()

      ' Print the header.
      Console.Write("Name               ")
      Console.Write("CodePage  ")
      Console.Write("BodyName           ")
      Console.Write("HeaderName         ")
      Console.Write("WebName            ")
      Console.WriteLine("Encoding.EncodingName")

      ' For every encoding, compare the name properties with EncodingInfo.Name.
      ' Display only the encodings that have one or more different names.
      Dim ei As EncodingInfo
      For Each ei In  Encoding.GetEncodings()
         Dim e As Encoding = ei.GetEncoding()
         
         If ei.Name <> e.BodyName OrElse ei.Name <> e.HeaderName OrElse ei.Name <> e.WebName Then
            Console.Write("{0,-18} ", ei.Name)
            Console.Write("{0,-9} ",  e.CodePage)
            Console.Write("{0,-18} ", e.BodyName)
            Console.Write("{0,-18} ", e.HeaderName)
            Console.Write("{0,-18} ", e.WebName)
            Console.WriteLine("{0} ", e.EncodingName)
         End If

      Next ei 

   End Sub

End Class


'This code produces the following output.
'
'Name               CodePage  BodyName           HeaderName         WebName            Encoding.EncodingName
'shift_jis          932       iso-2022-jp        iso-2022-jp        shift_jis          Japanese (Shift-JIS)
'windows-1250       1250      iso-8859-2         windows-1250       windows-1250       Central European (Windows)
'windows-1251       1251      koi8-r             windows-1251       windows-1251       Cyrillic (Windows)
'Windows-1252       1252      iso-8859-1         Windows-1252       Windows-1252       Western European (Windows)
'windows-1253       1253      iso-8859-7         windows-1253       windows-1253       Greek (Windows)
'windows-1254       1254      iso-8859-9         windows-1254       windows-1254       Turkish (Windows)
'csISO2022JP        50221     iso-2022-jp        iso-2022-jp        csISO2022JP        Japanese (JIS-Allow 1 byte Kana)
'iso-2022-kr        50225     iso-2022-kr        euc-kr             iso-2022-kr        Korean (ISO)

Remarques

La WebName propriété est la même que la Name propriété.

Notez que WebName retourne un nom enregistré par l’IANA pour l’encodage. Lorsque sa valeur est le nom d’une norme, l’implémentation de l’encodage peut ne pas être entièrement conforme à cette norme. La HeaderName propriété définit un encodage différent qui peut fonctionner mieux pour les en-têtes de courrier électronique. Toutefois, la plupart des applications doivent utiliser à la WebName place.

Pour plus d’informations sur l’IANA, accédez à www.IANA.org.

Encoding.WebNameEst le même que le EncodingInfo.Name retourné par Encoding.GetEncodings . Certains noms Web sont des doublons ; pour Encoding.GetEncodings plus d’informations, consultez les notes.

S’applique à

Voir aussi