ContentType ContentType ContentType ContentType Constructors

Definition

Overloads

ContentType() ContentType() ContentType()

Initializes a new default instance of the ContentType class.

ContentType(String) ContentType(String) ContentType(String) ContentType(String)

Initializes a new instance of the ContentType class using the specified string.

ContentType() ContentType() ContentType()

Initializes a new default instance of the ContentType class.

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

Examples

The following code example demonstrates how to call this constructor.

// The following example sends a summary of a log file as the message
// and the log as an email attachment.
static void SendNamedErrorLog( String^ server, String^ recipientList )
{
   
   // Create a message from logMailer@contoso.com to recipientList.
   MailMessage^ message = gcnew MailMessage( L"logMailer@contoso.com",recipientList );
   message->Subject = L"Error Log report";
   String^ fileName = L"log.txt";
   
   // Get the file stream for the error log.
   // Requires the System.IO namespace.
   FileStream^ fs = gcnew FileStream( fileName,FileMode::Open,FileAccess::Read );
   StreamReader^ s = gcnew StreamReader( fs );
   int errors = 0;
   while ( s->ReadLine() != nullptr )
   {
      
      // Process each line from the log file here.
      errors++;
   }

   message->Body = String::Format( L"{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 = gcnew 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 = gcnew ContentType;
   ct->MediaType = MediaTypeNames::Text::Plain;
   ct->Name = String::Format( L"log{0}.txt", DateTime::Now );
   
   // Create the attachment.
   Attachment^ data = gcnew 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 = gcnew SmtpClient( server );
   client->Credentials = CredentialCache::DefaultNetworkCredentials;
   client->Send( message );
   data->~Attachment();
   client->~SmtpClient();
   
   // Close the log file.
   fs->Close();
   return;
}


  // 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;
  }

Remarks

This constructor initializes the MediaType property to "application/octet-stream".

ContentType(String) ContentType(String) ContentType(String) ContentType(String)

Initializes a new instance of the ContentType class using the specified string.

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)

Parameters

contentType
String String String String

A String, for example, "text/plain; charset=us-ascii", that contains the MIME media type, subtype, and optional parameters.

Exceptions

contentType is in a form that cannot be parsed.

Examples

The following code example demonstrates how to call this constructor.

// The following example sends a summary of a log file as the message
// and the log as an email attachment.
static void SendNamedErrorLog( String^ server, String^ recipientList )
{
   
   // Create a message from logMailer@contoso.com to recipientList.
   MailMessage^ message = gcnew MailMessage( L"logMailer@contoso.com",recipientList );
   message->Subject = L"Error Log report";
   String^ fileName = L"log.txt";
   
   // Get the file stream for the error log.
   // Requires the System.IO namespace.
   FileStream^ fs = gcnew FileStream( fileName,FileMode::Open,FileAccess::Read );
   StreamReader^ s = gcnew StreamReader( fs );
   int errors = 0;
   while ( s->ReadLine() != nullptr )
   {
      
      // Process each line from the log file here.
      errors++;
   }

   message->Body = String::Format( L"{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 = gcnew 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 = gcnew ContentType;
   ct->MediaType = MediaTypeNames::Text::Plain;
   ct->Name = String::Format( L"log{0}.txt", DateTime::Now );
   
   // Create the attachment.
   Attachment^ data = gcnew 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 = gcnew SmtpClient( server );
   client->Credentials = CredentialCache::DefaultNetworkCredentials;
   client->Send( message );
   data->~Attachment();
   client->~SmtpClient();
   
   // Close the log file.
   fs->Close();
   return;
}


  // 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;
  }

Remarks

The syntax of the contentType string is described in RFC 2045 Section 5.1 available at https://www.ietf.org.

Applies to