GetFolderInfoCompleted Event

public event ExtendedAsyncCompletedEventHandler<TResult> GetFolderInfoCompleted

Public Event GetFolderInfoCompleted ExtendedAsyncCompletedEventHandler(Of TResult)

public:
 event ExtendedAsyncCompletedEventHandler<TResult>^ GetFolderInfoCompleted

Get information of an existing mailboxes asynchronously (Task-based asynchronous approach).

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

...

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

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

// Or you can specify the IMAP port with 
// client.Connect("myserver", 143); 
 
// Login to the server.
client.Authenticate("user", "password");

// ... 
 
// Obtain information about the 'INBOX' mailbox.
Folder folder = await client.GetFolderInfoAsync("INBOX");

// ...

Console.WriteLine("The number of recent messages: " + folder.RecentMessages);
Console.WriteLine("The number of new unseen messages messages: " + folder.NewUnseenMessages);

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

Imports ComponentPro
Imports ComponentPro.Net.Mail

...

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

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

' Or you can specify the IMAP port with 
' client.Connect("myserver", 143); 
 
' Login to the server.
client.Authenticate("user", "password")

' ... 
 
' Obtain information about the 'INBOX' mailbox. 
Dim folder As Folder = Await client.GetFolderInfoAsync("INBOX")

' ...

Console.WriteLine("The number of recent messages: " & folder.RecentMessages)
Console.WriteLine("The number of new unseen messages messages: " & folder.NewUnseenMessages)

' ... 
 
' Disconnect.
client.Disconnect()

Get information of an existing mailboxes asynchronously (Event-based asynchronous approach)

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

...

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

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

    // Or you can specify the IMAP port with 
    // client.Connect("myserver", 143); 
 
    // Login to the server. 
    client.Authenticate("user", "password");

    // ... 
 
    // Register an event handler. 
    client.GetFolderInfoCompleted += client_GetMailboxInfoCompleted;

    // Obtain information about the 'INBOX' mailbox. 
    client.GetFolderInfoAsync("INBOX");

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

void client_GetMailboxInfoCompleted(object sender, ExtendedAsyncCompletedEventArgs<Folder> e)
{
    if (e.Error != null)
    {
        Console.WriteLine("Error: " + e.Error.ToString());
    }
    else 
    {
        Console.WriteLine("The number of recent messages: " + e.Result.RecentMessages);
        Console.WriteLine("The number of new unseen messages messages: " + e.Result.NewUnseenMessages);
    }
}

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

...

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

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

    ' Or you can specify the IMAP port with 
    ' client.Connect("myserver", 143); 
 
    ' Login to the server. 
    client.Authenticate("user", "password")

    ' ... 
 
    ' Register an event handler. 
    AddHandler client.GetFolderInfoCompleted, AddressOf client_GetMailboxInfoCompleted

    ' Obtain information about the 'INBOX' mailbox. 
    client.GetFolderInfoAsync("INBOX")

    ' ... 
 
    ' Disconnect. 
    client.Disconnect()
End Sub 
 
Private Sub client_GetMailboxInfoCompleted(ByVal sender As Object, ByVal e As ExtendedAsyncCompletedEventArgs(Of Folder))
    If e.Error IsNot Nothing Then 
        Console.WriteLine("Error: " & e.Error.ToString())
    Else 
        Console.WriteLine("The number of recent messages: " & e.Result.RecentMessages)
        Console.WriteLine("The number of new unseen messages messages: " & e.Result.NewUnseenMessages)
    End If 
End Sub

Reference