DownloadingMessageEventArgs Class

public class DownloadingMessageEventArgs : AsyncEventArgs

Public Class DownloadingMessageEventArgs
   Inherits AsyncEventArgs

public ref class DownloadingMessageEventArgs : public AsyncEventArgs

Shows how to handle the DownloadingMessage event when processing messages downloaded from an IMAP server.

using System;
using System.Windows.Forms;
using ComponentPro.Net;
using ComponentPro.Net.Mail;

...

static void Main()
{
    // IMAP server information. 
    const string serverName = "myserver";
    const string user = "name@domain.com";
    const string password = "mytestpassword";
    const int port = 993;
    const SslSecurityMode securityMode = SslSecurityMode.Implicit;

    // Create a new instance of the Imap class. 
    Imap client = new Imap();
    try 
    {
        Console.WriteLine("Connecting IMAP server: {0}:{1}...", serverName, port);
        // Connect to the server. 
        client.Connect(serverName, port, securityMode);

        // Login to the server. 
        Console.WriteLine("Logging in as {0}...", user);
        client.Authenticate(user, password);

        // Initialize BounceInspector. 
        BounceInspector inspector = new BounceInspector();
        inspector.AllowInboxDelete = false; // true if you want BounceInspector automatically delete all hard bounces. 
 
        // Handle events. 
        inspector.Processing += inspector_Processing;
        inspector.Processed += inspector_Processed;
        inspector.DownloadingMessage += inspector_DownloadingMessage;

        // Download messages from IMAP 'Inbox' folder to 'c:\test' and process them. 
        BounceResultCollection result = inspector.ProcessMessages(client, "Inbox", "c:\\test");
        // Download messages from IMAP 'Inbox' folder to memory stream and process them. 
        //BounceResultCollection result = inspector.ProcessMessages(client, "Inbox"); 
 
        // Display processed emails. 
        foreach (BounceResult r in result)
        {
            // If this message was identified as a bounced email message. 
            if (r.Identified)
            {
                // Print out the result 
                Console.Write("FileName: {0}\nSubject: {1}\nAddress: {2}\nBounce Category: {3}\nBounce Type: {4}\nDeleted: {5}\nDSN Action: {6}\nDSN Diagnostic Code: {7}\n\n",
                                System.IO.Path.GetFileName(r.FilePath),
                                r.MailMessage.Subject,
                                r.Addresses[0],
                                r.BounceCategory.Name,
                                r.BounceType.Name,
                                r.FileDeleted,
                                r.Dsn.Action,
                                r.Dsn.DiagnosticCode);
            }
        }

        Console.WriteLine("{0} bounced message found", result.BounceCount);

        // Disconnect. 
        Console.WriteLine("Disconnecting...");
        client.Disconnect();

    }
    catch (ImapException imapExc)
    {
        MessageBox.Show(string.Format("An IMAP error occurred: {0}, ErrorStatus: {1}", imapExc.Message, imapExc.Status));
    }
    catch (Exception exc)
    {
        MessageBox.Show(string.Format("An error occurred: {0}", exc.Message));
    }
}

static void inspector_Processing(object sender, ProcessingEventArgs e)
{
    // Skip all messages containing "Test" in subject. 
    if (e.MailMessage.Subject.IndexOf("Test") != -1)
        e.Skip = true;
}

static int id = 0;            

/// <summary> 
/// Handles the BounceInspector's DownloadingMessages event. 
/// </summary> 
/// <param name="sender">The BounceInspector object.</param> 
/// <param name="e">The event arguments.</param> 
static void inspector_DownloadingMessage(object sender, DownloadingMessageEventArgs e)
{
    if (e.FileExists)
        // Skip if message containing "Cxj89" already exists. 
        if (e.ImapMessage.UniqueId.IndexOf("Cxj89") != -1)
        {
            e.Skip = true;
        }
        // Otherwise rename destination file name. 
        else 
        {
            e.FileName = "tmp" + id;
            id++;
            // You can also set e.DirectoryName to another destination folder. 
            // e.DirectoryName = "temp"; 
        }
}

/// <summary> 
/// Handles the BounceInspector's Processed event. 
/// </summary> 
/// <param name="sender">The BounceInspector object.</param> 
/// <param name="e">The event arguments.</param> 
static void inspector_Processed(object sender, ProcessedEventArgs e)
{
    Console.WriteLine("Processed mail with subject '{0}'...", e.MailMessage.Subject);
}

Imports ComponentPro.Net
Imports ComponentPro.Net.Mail

...

Shared Sub Main()
    ' IMAP server information. 
    Const serverName As String = "myserver" 
    Const user As String = "name@domain.com" 
    Const password As String = "mytestpassword" 
    Const port As Integer = 993
    Const securityMode As SslSecurityMode = SslSecurityMode.Implicit

    ' Create a new instance of the Imap class. 
    Dim client As New Imap()
    Try 
        Console.WriteLine("Connecting IMAP server: {0}:{1}...", serverName, port)
        ' Connect to the server. 
        client.Connect(serverName, port, securityMode)

        ' Login to the server. 
        Console.WriteLine("Logging in as {0}...", user)
        client.Authenticate(user, password)

        ' Initialize BounceInspector. 
        Dim inspector As New BounceInspector()
        inspector.AllowInboxDelete = False ' true if you want BounceInspector automatically delete all hard bounces. 
 
        ' Handle events. 
        AddHandler inspector.Processing, AddressOf inspector_Processing
        AddHandler inspector.Processed, AddressOf inspector_Processed
        AddHandler inspector.DownloadingMessage, AddressOf inspector_DownloadingMessage

        ' Download messages from IMAP 'Inbox' folder to 'c:\test' and process them. 
        Dim result As BounceResultCollection = inspector.ProcessMessages(client, "Inbox", "c:\test")
        ' Download messages from IMAP 'Inbox' folder to memory stream and process them. 
        'BounceResultCollection result = inspector.ProcessMessages(client, "Inbox"); 
 
        ' Display processed emails. 
        For Each r As BounceResult In result
            ' If this message was identified as a bounced email message. 
            If r.Identified Then 
                ' Print out the result 
                Console.Write("FileName: {0}" & vbLf & "Subject: {1}" & vbLf & "Address: {2}" & vbLf & "Bounce Category: {3}" & vbLf & "Bounce Type: {4}" & vbLf & "Deleted: {5}" & vbLf & "DSN Action: {6}" & vbLf & "DSN Diagnostic Code: {7}" & vbLf & vbLf, System.IO.Path.GetFileName(r.FilePath), r.MailMessage.Subject, r.Addresses(0), r.BounceCategory.Name, r.BounceType.Name, r.FileDeleted, r.Dsn.Action, r.Dsn.DiagnosticCode)
            End If 
        Next r

        Console.WriteLine("{0} bounced message found", result.BounceCount)

        ' Disconnect. 
        Console.WriteLine("Disconnecting...")
        client.Disconnect()

    Catch imapExc As ImapException
        MessageBox.Show(String.Format("An IMAP error occurred: {0}, ErrorStatus: {1}", imapExc.Message, imapExc.Status))
    Catch exc As Exception
        MessageBox.Show(String.Format("An error occurred: {0}", exc.Message))
    End Try 
End Sub 
 
Private Shared Sub inspector_Processing(ByVal sender As Object, ByVal e As ProcessingEventArgs)
    ' Skip all messages containing "Test" in subject. 
    If e.MailMessage.Subject.IndexOf("Test") <> -1 Then 
        e.Skip = True 
    End If 
End Sub 
 
Private Shared id As Integer = 0

''' <summary> 
''' Handles the BounceInspector's DownloadingMessages event. 
''' </summary> 
''' <param name="sender">The BounceInspector object.</param> 
''' <param name="e">The event arguments.</param> 
Private Shared Sub inspector_DownloadingMessage(ByVal sender As Object, ByVal e As DownloadingMessageEventArgs)
    If e.FileExists Then 
        ' Skip if message containing "Cxj89" already exists. 
        If e.ImapMessage.UniqueId.IndexOf("Cxj89") <> -1 Then 
            e.Skip = True 
        ' Otherwise rename destination file name. 
        Else 
            e.FileName = "tmp" & id
            id += 1
            ' You can also set e.DirectoryName to another destination folder. 
            ' e.DirectoryName = "temp"; 
        End If 
    End If 
End Sub 
 
''' <summary> 
''' Handles the BounceInspector's Processed event. 
''' </summary> 
''' <param name="sender">The BounceInspector object.</param> 
''' <param name="e">The event arguments.</param> 
Private Shared Sub inspector_Processed(ByVal sender As Object, ByVal e As ProcessedEventArgs)
    Console.WriteLine("Processed mail with subject '{0}'...", e.MailMessage.Subject)
End Sub

Reference