ContentType Konstruktorer

Definition

Namnområde:
System.Net.Mime
Sammansättningar:
netstandard.dll, System.Net.Mail.dll
Sammansättning:
System.Net.Mail.dll
Sammansättning:
System.dll
Sammansättning:
netstandard.dll

Initierar en ny instans av ContentType klassen.

Överlagringar

Name Description
ContentType()

Initierar en ny standardinstans av ContentType klassen.
ContentType(String)

Initierar en ny instans av ContentType klassen med den angivna strängen.

ContentType()

Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs

Initierar en ny standardinstans av ContentType klassen.

public:
 ContentType();
public ContentType();
Public Sub New ()

Exempel

Följande kodexempel visar hur du anropar den här konstruktorn.

// The following example sends a summary of a log file as the message
// and the log as an email attachment.
public static void SendNamedErrorLog(string server, string recipientList)
{
    // Create a message from logMailer@contoso.com to recipientList.
    MailMessage message = new MailMessage(
       "logMailer@contoso.com", recipientList);

    message.Subject = "Error Log report";
    string fileName = "log.txt";
    // Get the file stream for the error log.
    // Requires the System.IO namespace.
    FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
    StreamReader s = new StreamReader(fs);
    int errors = 0;
    while (s.ReadLine() != null)
    {
        // Process each line from the log file here.
        errors++;
    }
    // The email message summarizes the data found in the log.
    message.Body = String.Format("{0} errors in log as of {1}",
        errors, DateTime.Now);
    // Close the stream reader. This also closes the file.
    s.Close();
    // Re-open the file at the beginning to make the attachment.
    fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
    // Make a ContentType indicating that the log data
    // that is attached is plain text and is named.
    ContentType ct = new ContentType();
    ct.MediaType = MediaTypeNames.Text.Plain;
    ct.Name = "log" + DateTime.Now.ToString() + ".txt";
    // Create the attachment.
    Attachment data = new Attachment(fs, ct);
    // Add the attachment to the message.
    message.Attachments.Add(data);
    // Send the message.
    // Include credentials if the server requires them.
    SmtpClient client = new SmtpClient(server);
    client.Credentials = CredentialCache.DefaultNetworkCredentials;

    try
    {
        client.Send(message);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception caught in SendNamedErrorLog: {0}",
            ex.ToString());
    }
    data.Dispose();
    // Close the log file.
    fs.Close();
    return;
}

Kommentarer

Den här konstruktorn initierar MediaType egenskapen till "application/octet-stream".

Gäller för

ContentType(String)

Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs
Källa:
ContentType.cs

Initierar en ny instans av ContentType klassen med den angivna strängen.

public:
 ContentType(System::String ^ contentType);
public ContentType(string contentType);
new System.Net.Mime.ContentType : string -> System.Net.Mime.ContentType
Public Sub New (contentType As String)

Parametrar

contentType
String

En String, till exempel "text/plain; charset=us-ascii", som innehåller MIME-medietypen, undertypen och valfria parametrar.

Undantag

ArgumentNullException

contentType är null.

ArgumentException

contentType är Empty ("").

FormatException

contentType är i ett formulär som inte kan parsas.

Exempel

Följande kodexempel visar hur du anropar den här konstruktorn.

// The following example sends a summary of a log file as the message
// and the log as an email attachment.
public static void SendNamedErrorLog(string server, string recipientList)
{
    // Create a message from logMailer@contoso.com to recipientList.
    MailMessage message = new MailMessage(
       "logMailer@contoso.com", recipientList);

    message.Subject = "Error Log report";
    string fileName = "log.txt";
    // Get the file stream for the error log.
    // Requires the System.IO namespace.
    FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
    StreamReader s = new StreamReader(fs);
    int errors = 0;
    while (s.ReadLine() != null)
    {
        // Process each line from the log file here.
        errors++;
    }
    // The email message summarizes the data found in the log.
    message.Body = String.Format("{0} errors in log as of {1}",
        errors, DateTime.Now);
    // Close the stream reader. This also closes the file.
    s.Close();
    // Re-open the file at the beginning to make the attachment.
    fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
    // Make a ContentType indicating that the log data
    // that is attached is plain text and is named.
    ContentType ct = new ContentType();
    ct.MediaType = MediaTypeNames.Text.Plain;
    ct.Name = "log" + DateTime.Now.ToString() + ".txt";
    // Create the attachment.
    Attachment data = new Attachment(fs, ct);
    // Add the attachment to the message.
    message.Attachments.Add(data);
    // Send the message.
    // Include credentials if the server requires them.
    SmtpClient client = new SmtpClient(server);
    client.Credentials = CredentialCache.DefaultNetworkCredentials;

    try
    {
        client.Send(message);
    }
    catch (Exception ex)
    {
        Console.WriteLine("Exception caught in SendNamedErrorLog: {0}",
            ex.ToString());
    }
    data.Dispose();
    // Close the log file.
    fs.Close();
    return;
}

Kommentarer

Syntaxen för strängen contentType beskrivs i RFC 2045 Avsnitt 5.1 som är tillgängligt på https://www.ietf.org.

Gäller för