ContentType.Boundary Propiedad

Referencia

Definición

Espacio de nombres:: System.Net.Mime

Ensamblado:: System.Net.Mail.dll

Ensamblado:: System.dll

Ensamblado:: netstandard.dll

Source:: ContentType.cs

Source:: ContentType.cs

Source:: ContentType.cs

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Obtiene o establece el valor del parámetro boundary incluido en el encabezado Content-Type al que esta instancia representa.

public:
 property System::String ^ Boundary { System::String ^ get(); void set(System::String ^ value); };

public string? Boundary { get; set; }

public string Boundary { get; set; }

member this.Boundary : string with get, set

Public Property Boundary As String

Valor de propiedad

String

Objeto String que contiene el valor asociado al parámetro boundary.

Ejemplos

En el ejemplo de código siguiente se muestra el valor de la Boundary propiedad .

static void CreateMessageWithMultipleViews( String^ server, String^ recipients )
{
   
   // Create a message and set up the recipients.
   MailMessage^ message = gcnew MailMessage( L"jane@contoso.com",recipients,L"This email message has multiple views.",L"This is some plain text." );
   
   // Construct the alternate body as HTML.
   String^ body = L"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";
   body = String::Concat( body, L"<HTML><HEAD><META http-equiv=Content-Type content=\"text/html; charset=iso-8859-1\">" );
   body = String::Concat( body, L"</HEAD><BODY><DIV><FONT face=Arial color=#ff0000 size=2>this is some HTML text" );
   body = String::Concat( body, L"</FONT></DIV></BODY></HTML>" );
   
   // Add the alternate body to the message.
   AlternateView^ alternate = AlternateView::CreateAlternateViewFromString(body);
   message->AlternateViews->Add(alternate);

   // Send the message.
   SmtpClient^ client = gcnew SmtpClient( server );
   client->Credentials = CredentialCache::DefaultNetworkCredentials;
   client->Send( message );
   
   // Display the values in the ContentType for the attachment.
   ContentType^ c = alternate->ContentType;
   Console::WriteLine( L"Content type" );
   Console::WriteLine( c );
   Console::WriteLine( L"Boundary {0}", c->Boundary );
   Console::WriteLine( L"CharSet {0}", c->CharSet );
   Console::WriteLine( L"MediaType {0}", c->MediaType );
   Console::WriteLine( L"Name {0}", c->Name );
   Console::WriteLine( L"Parameters: {0}", c->Parameters->Count );
   IEnumerator^ myEnum = c->Parameters->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      DictionaryEntry^ d = safe_cast<DictionaryEntry^>(myEnum->Current);
      Console::WriteLine( L"{0} = {1}", d->Key, d->Value );
   }

   Console::WriteLine();
   alternate->~AlternateView();
}

public static void CreateMessageWithMultipleViews(string server, string recipients)
{
    // Create a message and set up the recipients.
    MailMessage message = new MailMessage(
        "jane@contoso.com",
        recipients,
        "This email message has multiple views.",
        "This is some plain text.");

    // Construct the alternate body as HTML.
    string body = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";
    body += "<HTML><HEAD><META http-equiv=Content-Type content=\"text/html; charset=iso-8859-1\">";
    body += "</HEAD><BODY><DIV><FONT face=Arial color=#ff0000 size=2>this is some HTML text";
    body += "</FONT></DIV></BODY></HTML>";

    ContentType mimeType = new System.Net.Mime.ContentType("text/html");
    // Add the alternate body to the message.

    AlternateView alternate = AlternateView.CreateAlternateViewFromString(body, mimeType);
    message.AlternateViews.Add(alternate);

    // Send the message.
    SmtpClient client = new SmtpClient(server);
    client.Credentials = CredentialCache.DefaultNetworkCredentials;

    try
    {
        client.Send(message);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception caught in CreateMessageWithMultipleViews(): {0}",
            ex.ToString());
    }
    // Display the values in the ContentType for the attachment.
    ContentType c = alternate.ContentType;
    Console.WriteLine("Content type");
    Console.WriteLine(c.ToString());
    Console.WriteLine("Boundary {0}", c.Boundary);
    Console.WriteLine("CharSet {0}", c.CharSet);
    Console.WriteLine("MediaType {0}", c.MediaType);
    Console.WriteLine("Name {0}", c.Name);
    Console.WriteLine("Parameters: {0}", c.Parameters.Count);
    foreach (DictionaryEntry d in c.Parameters)
    {
        Console.WriteLine("{0} = {1}", d.Key, d.Value);
    }
    Console.WriteLine();
    alternate.Dispose();
}

Comentarios

En el ejemplo siguiente de un encabezado Content-Type, el valor del Boundary parámetro es "-----boundary---0".

content-type: multipart/mixed; boundary=-----boundary---0

Establezca esta propiedad null en o String.Empty para quitar la información de límite del encabezado.

La sintaxis del encabezado Content-Type se describe en RFC 2045 Section 5.1. En la sección 5.1.1 de RFC 2046 se incluye una explicación detallada del parámetro de límite. Estas RFC están disponibles en https://www.ietf.org.

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