Occurs on progress of sending message source data to the SMTP server.

Event Data

The event handler receives an argument of type SmtpMessageDataChunkSentEventArgs containing data related to this event. The following SmtpMessageDataChunkSentEventArgs properties provide information specific to this event.

Remarks

This event is a special case of DataSent event. While DataSent event occurs when any data is sent, MessageDataChunkSent event indicates when message data is being sent. In other words, MessageDataChunkSent event is a filtered version of more general DataSent event.

When both DataSent and MessageDataChunkSent events are used, DataSent is raised first.

Example

This sample submits a mail message to the SMTP server. Both DataSent and MessageDataChunkSent events are handled, and the corresponding messages are printed into console when each of these events is raised. This sample demonstrates that DataSent is raised more often than MessageDataChunkSent.

[C#]
using System;
using MailBee;
using MailBee.SmtpMail;

class Sample
{
    // DataSent event handler.
    private static void OnDataSent(object sender, DataTransferEventArgs e)
    {
        Console.WriteLine(e.Data.Length + " bytes sent");
    }

    // MessageDataChunkSent event handler.
    private static void OnMessageDataChunkSent(object sender,
        SmtpMessageDataChunkSentEventArgs e)
    {
        Console.WriteLine(e.BytesJustSent + " bytes of the message " +
            e.MailMessage.MessageID + " sent");
    }

    // The actual code.
    static void Main(string[] args)
    {
        Smtp mailer = new Smtp();

        // Specify SMTP server and enable ESMTP authentication.
        // Note, depending on your SMTP server settings, either 
        // "jdoe" or "jdoe@domain.com" should be used as user account name.
        mailer.SmtpServers.Add("mail.domain.com", "jdoe", "secret");

        // Subscribe to events.
        mailer.DataSent += new DataTransferEventHandler(OnDataSent);
        mailer.MessageDataChunkSent +=
            new SmtpMessageDataChunkSentEventHandler(OnMessageDataChunkSent);

        // Send a message (attach a big file to make the message be sent 
        // in multiple data chunks).
        mailer.To.AsString = "recipient1@domain1.com, recipient2@domain2.com";
        mailer.From.Email = "sender@domain.com";
        mailer.Subject = "Test message";
        mailer.BodyPlainText = "The message with attachment";
        mailer.AddAttachment(@"C:\bigfile.mdb");
        mailer.Send();

        Console.WriteLine("Message sent to: " +
            mailer.GetAcceptedRecipients().ToString());
    }
}

[Visual Basic]
Imports System
Imports MailBee
Imports MailBee.SmtpMail

Class Sample
    ' DataSent event handler.
    Private Shared Sub OnDataSent(ByVal sender As Object, ByVal e As DataTransferEventArgs)
        Console.WriteLine(e.Data.Length & " bytes sent")
    End Sub

    Private Shared Sub OnMessageDataChunkSent(ByVal sender As Object, _
        ByVal e As SmtpMessageDataChunkSentEventArgs)
        Console.WriteLine(e.BytesJustSent & " bytes of the message " & _
            e.MailMessage.MessageID & " sent")
    End Sub

    ' The actual code.
    Shared Sub Main(ByVal args As String())
        Dim mailer As New Smtp

        ' Specify SMTP server and enable ESMTP authentication.
        ' Note, depending on your SMTP server settings, either 
        ' "jdoe" or "jdoe@domain.com" should be used as user account name.
        mailer.SmtpServers.Add("mail.domain.com", "jdoe", "secret")

        ' Subscribe to events.
        AddHandler mailer.DataSent, AddressOf OnDataSent
        AddHandler mailer.MessageDataChunkSent, AddressOf OnMessageDataChunkSent

        ' Send a message (attach a big file to make the message be sent 
        ' in multiple data chunks).
        mailer.To.AsString = "recipient1@domain1.com, recipient2@domain2.com"
        mailer.From.Email = "sender@domain.com"
        mailer.Subject = "Test message"
        mailer.BodyPlainText = "The message with attachment"
        mailer.AddAttachment("C:\bigfile.mdb")
        mailer.Send()

        Console.WriteLine("Message sent to: " & _
            mailer.GetAcceptedRecipients().ToString())
    End Sub
End Class

See Also

Smtp Class | MailBee.SmtpMail Namespace | DataSent

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