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MailMessage.AlternateViews Özellik

Tanım

İleti gövdesinin alternatif formlarını depolamak için kullanılan ek koleksiyonunu alır.

public:
 property System::Net::Mail::AlternateViewCollection ^ AlternateViews { System::Net::Mail::AlternateViewCollection ^ get(); };
public System.Net.Mail.AlternateViewCollection AlternateViews { get; }
member this.AlternateViews : System.Net.Mail.AlternateViewCollection
Public ReadOnly Property AlternateViews As AlternateViewCollection

Özellik Değeri

Yazılabilir AlternateViewCollectionbir .

Örnekler

Aşağıdaki kod örneğinde düz metin ve HTML alternatif görünümüyle e-posta iletisi oluşturma ve gönderme işlemleri gösterilmektedir.

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();
}
Public Shared Sub CreateMessageWithMultipleViews(ByVal server As String, ByVal recipients As String)
    ' Create a message and set up the recipients.
    Dim message As MailMessage = New MailMessage(
        "jane@contoso.com",
        recipients,
        "This email message has multiple views.",
        "This is some plain text.")

    ' Construct the alternate body as HTML.
    Dim body As String = "<!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>"

    Dim mimeType As ContentType = New System.Net.Mime.ContentType("text/html")

    ' Add the alternate body to the message.
    Dim alternate As AlternateView = AlternateView.CreateAlternateViewFromString(body, mimeType)
    message.AlternateViews.Add(alternate)

    ' Send the message.
    Dim client As SmtpClient = New SmtpClient(server)
    client.Credentials = CredentialCache.DefaultNetworkCredentials

    Try
        client.Send(message)
    Catch ex As Exception
        Console.WriteLine("Exception caught in CreateMessageWithMultipleViews(): {0}", ex.ToString())
    End Try

    ' Display the values in the ContentType for the attachment.
    Dim c As ContentType = 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)

    For Each d As DictionaryEntry In c.Parameters
        Console.WriteLine("{0} = {1}", d.Key, d.Value)
    Next

    Console.WriteLine()
    alternate.Dispose()
End Sub

Açıklamalar

Bir e-posta iletisinin AlternateViews kopyalarını farklı biçimlerde belirtmek için özelliğini kullanın. Örneğin, HTML ile ileti gönderirseniz, alıcılardan bazılarının HTML içeriğini görüntüleyemeyen e-posta okuyucuları kullanması durumunda düz metin sürümü de sağlamak isteyebilirsiniz.

Nesneye alternatif bir MailMessage görünüm eklemek için görünüm için bir Attachment oluşturun ve ardından tarafından AlternateViewsdöndürülen koleksiyona ekleyin. Body Özelliğini kullanarak metin sürümünü belirtin ve koleksiyonu kullanarak AlternateViews diğer MIME türleriyle görünümleri belirtin. MediaTypeNames Alternatif görünüm için MIME türünü belirtmek üzere sınıf üyelerini kullanın.

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