Encoding.WebName Proprietà
Definizione
Importante
Alcune informazioni sono relative alla release non definitiva del prodotto, che potrebbe subire modifiche significative prima della release definitiva. Microsoft non riconosce alcuna garanzia, espressa o implicita, in merito alle informazioni qui fornite.
Quando ne viene eseguito l'override in una classe derivata, ottiene il nome registrato con IANA (Internet Assigned Numbers Authority) per la codifica corrente.
public:
virtual property System::String ^ WebName { System::String ^ get(); };public virtual string WebName { get; }member this.WebName : stringPublic Overridable ReadOnly Property WebName As StringValore della proprietà
Nome IANA per l'oggetto Encoding corrente.
Esempio
Nell'esempio seguente viene incluso WebName in un'intestazione 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>
'
Nell'esempio seguente vengono recuperati i nomi diversi per ogni codifica e vengono visualizzate le codifiche con uno o più nomi diversi da EncodingInfo.Name . Viene visualizzato, EncodingName ma non viene confrontato.
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)
Commenti
La WebName proprietà è uguale alla Name Proprietà.
Si noti che WebName restituisce un nome registrato da IANA per la codifica. Quando il relativo valore è il nome di uno standard, l'implementazione della codifica potrebbe non essere conforme completamente a tale standard. La HeaderName proprietà definisce una codifica diversa che può funzionare meglio per le intestazioni di posta elettronica. Tuttavia, la maggior parte delle app deve WebName invece usare.
Per ulteriori informazioni su IANA, vedere www.IANA.org.
Encoding.WebNameÈ uguale all'oggetto EncodingInfo.Name restituito da Encoding.GetEncodings . Alcuni dei nomi Web sono duplicati; Encoding.GetEncodingsper ulteriori informazioni, vedere la sezione Osservazioni.