ContentType.Boundary Eigenschaft
Definition
Wichtig
Einige Informationen beziehen sich auf Vorabversionen, die vor dem Release ggf. grundlegend überarbeitet werden. Microsoft übernimmt hinsichtlich der hier bereitgestellten Informationen keine Gewährleistungen, seien sie ausdrücklich oder konkludent.
Ruft den Wert des Begrenzungsparameters in dem durch diese Instanz dargestellten Content-Type-Header ab oder legt diesen fest.
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
Eigenschaftswert
Ein String, der den dem Begrenzungsparameter zugeordneten Wert enthält.
Beispiele
Im folgenden Codebeispiel wird der Wert der Boundary -Eigenschaft angezeigt.
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();
}
Hinweise
Im folgenden Beispiel für einen Content-Type-Header ist der Wert des Boundary Parameters "-----boundary---0
".
content-type: multipart/mixed; boundary=-----boundary---0
Legen Sie diese Eigenschaft auf oder String.Empty festnull
, um die Begrenzungsinformationen aus dem Header zu entfernen.
Die Syntax des Content-Type-Headers wird in RFC 2045 Abschnitt 5.1 beschrieben. Eine ausführliche Erläuterung des Begrenzungsparameters finden Sie in RFC 2046, Abschnitt 5.1.1. Diese RFCs sind unter https://www.ietf.orgverfügbar.