ContentType Konstruktory

Definice

Obor názvů:

System.Net.Mime

Sestavení:

netstandard.dll, System.Net.Mail.dll

Inicializuje novou instanci ContentType třídy.

Přetížení

Name	Description
ContentType()	Inicializuje novou výchozí instanci ContentType třídy.
ContentType(String)	Inicializuje novou instanci ContentType třídy pomocí zadaného řetězce.

ContentType()

Zdroj:

ContentType.cs

Inicializuje novou výchozí instanci ContentType třídy.

public:
 ContentType();

public ContentType();

Public Sub New ()

Příklady

Následující příklad kódu ukazuje, jak volat tento konstruktor.

// 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;
}

Poznámky

Tento konstruktor inicializuje MediaType vlastnost na "application/octet-stream".

ContentType(String)

Zdroj:

ContentType.cs

Inicializuje novou instanci ContentType třídy pomocí zadaného řetězce.

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)

Parametry

contentType

String

A String, například "text/plain; charset=us-ascii", který obsahuje typ média MIME, podtyp a volitelné parametry.

Výjimky

ArgumentNullException

contentType je null.

ArgumentException

contentType je Empty ("").

FormatException

contentType je ve formě, kterou nelze analyzovat.

Příklady

Následující příklad kódu ukazuje, jak volat tento konstruktor.

// 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;
}

Poznámky

Syntaxe contentType řetězce je popsána v dokumentu RFC 2045 Oddíl 5.1 dostupný na adrese https://www.ietf.org.