ListMessagesCompleted Event

public event ExtendedAsyncCompletedEventHandler<TResult> ListMessagesCompleted

Public Event ListMessagesCompleted ExtendedAsyncCompletedEventHandler(Of TResult)

public:
 event ExtendedAsyncCompletedEventHandler<TResult>^ ListMessagesCompleted

Shows how to connect to a POP3 server and retrieve the list of messages asynchronously.

using System;
using ComponentPro.Net.Mail;

...

// Create a new instance of the Pop3 class.
Pop3 client = new Pop3();

// Connect to the server.
client.Connect("myserver");

// Or you can specify the POP3 port with 
// client.Connect("myserver", 110); 
 
// Login to the server.
client.Authenticate("user", "password");

// ... 
 
// List all messages in the selected folder.
Pop3MessageCollection listMessages = await client.ListMessagesAsync(Pop3EnvelopeParts.UniqueId | Pop3EnvelopeParts.Size);

// ... 
 
foreach (Pop3Message m in listMessages)
{
    Console.WriteLine(string.Format("UniqueId: {0}, Size: {1}", m.UniqueId, m.Size));
}

// Disconnect.
client.Disconnect();

Imports ComponentPro.Net.Mail

...

' Create a new instance of the Pop3 class. 
Dim client As New Pop3()

' Connect to the server.
client.Connect("myserver")

' Or you can specify the POP3 port with 
' client.Connect("myserver", 110); 
 
' Login to the server.
client.Authenticate("user", "password")

' ... 
 
' List all messages in the selected folder. 
Dim listMessages As Pop3MessageCollection = Await client.ListMessagesAsync(Pop3EnvelopeParts.UniqueId Or Pop3EnvelopeParts.Size)

' ... 
 
For Each m As Pop3Message In listMessages
    Console.WriteLine(String.Format("UniqueId: {0}, Size: {1}", m.UniqueId, m.Size))
Next m

' Disconnect.
client.Disconnect()

Shows how to connect to a POP3 server and retrieve the list of messages asynchronously.

using System;
using System.ComponentModel;
using ComponentPro;
using ComponentPro.Net.Mail;

...

public void DoListMessagesAsync()
{
    // Create a new instance of the Pop3 class. 
    Pop3 client = new Pop3();

    // Connect to the server. 
    client.Connect("myserver");

    // Or you can specify the POP3 port with 
    // client.Connect("myserver", 110); 
 
    // Login to the server. 
    client.Authenticate("user", "password");

    // ... 
 
    // Register an event handler. 
    client.ListMessagesCompleted += client_ListMessagesCompleted;

    // List all messages in the selected folder. 
    client.ListMessagesAsync(Pop3EnvelopeParts.UniqueId | Pop3EnvelopeParts.Size);

    // ... 
 
    // Disconnect. 
    client.Disconnect();
}

void client_ListMessagesCompleted(object sender, ExtendedAsyncCompletedEventArgs<Pop3MessageCollection> e)
{
    // Pop3 client = (Pop3)sender; 
    if (e.Error != null)
        Console.WriteLine("Error: " + e.Error.ToString());
    else 
    {
        Pop3MessageCollection listMessages = e.Result;

        foreach (Pop3Message m in listMessages)
        {
            Console.WriteLine(string.Format("UniqueId: {0}, Size: {1}", m.UniqueId, m.Size));
        }
    }
}

Imports System.ComponentModel
Imports ComponentPro
Imports ComponentPro.Net.Mail

...

Public Sub DoListMessagesAsync()
    ' Create a new instance of the Pop3 class. 
    Dim client As New Pop3()

    ' Connect to the server. 
    client.Connect("myserver")

    ' Or you can specify the POP3 port with 
    ' client.Connect("myserver", 110); 
 
    ' Login to the server. 
    client.Authenticate("user", "password")

    ' ... 
 
    ' Register an event handler. 
    AddHandler client.ListMessagesCompleted, AddressOf client_ListMessagesCompleted

    ' List all messages in the selected folder. 
    client.ListMessagesAsync(Pop3EnvelopeParts.UniqueId Or Pop3EnvelopeParts.Size)

    ' ... 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Sub client_ListMessagesCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of Pop3MessageCollection))
    ' Pop3 client = (Pop3)sender; 
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
    Else 
        Dim listMessages As Pop3MessageCollection = e.Result

        For Each m As Pop3Message In listMessages
            Console.WriteLine(String.Format("UniqueId: {0}, Size: {1}", m.UniqueId, m.Size))
        Next m
    End If 
End Sub

Reference