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Classic ASP Examples


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(Classic ASP) Async Methods Returning an Object

Demonstrates how to call an asynchronous method that returns an object. This example reads email from a POP3 server using the Async versions of the Chilkat methods.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
'  All Chilkat classes can be unlocked at once at the beginning of a program
'  by calling UnlockBundle.  It requires a Bundle unlock code.
set chilkatGlob = Server.CreateObject("Chilkat_9_5_0.Global")
success = chilkatGlob.UnlockBundle("Anything for 30-day trial.")
If (success <> 1) Then
    Response.Write "<pre>" & Server.HTMLEncode( chilkatGlob.LastErrorText) & "</pre>"

End If

set mailman = Server.CreateObject("Chilkat_9_5_0.MailMan")

'  Set the POP3 server's hostname
mailman.MailHost = "pop.someMailServer.com"

'  Set the POP3 login/password and any other requirements..
mailman.PopUsername = "myLogin"
mailman.PopPassword = "myPassword"
mailman.PopSsl = 1
mailman.MailPort = 995

'  Connect to the POP3 server:
' task is a Chilkat_9_5_0.Task
Set task = mailman.Pop3BeginSessionAsync()
If (task Is Nothing ) Then
    Response.Write "<pre>" & Server.HTMLEncode( mailman.LastErrorText) & "</pre>"

End If

'  Start the background task.
success = task.Run()
If (Not success) Then
    Response.Write "<pre>" & Server.HTMLEncode( task.LastErrorText) & "</pre>"

End If

'  Wait for the POP3 connect task to finish.
'  The 1/0 returned by Wait applies to the Wait method call, not the task.
maxWaitMs = 30000
success = task.Wait(maxWaitMs)
If (Not success Or (task.StatusInt <> 7) Or (task.TaskSuccess <> 1)) Then
    If (Not success) Then
        '  The task.LastErrorText applies to the Wait method call.
        Response.Write "<pre>" & Server.HTMLEncode( task.LastErrorText) & "</pre>"
    Else
        '  The ResultErrorText applies to the underlying task method call (i.e. the Pop3BeginSession)
        Response.Write "<pre>" & Server.HTMLEncode( task.Status) & "</pre>"
        Response.Write "<pre>" & Server.HTMLEncode( task.ResultErrorText) & "</pre>"
    End If

End If

'  Get the number of messages in the mailbox.
' task is a Chilkat_9_5_0.Task
Set task = mailman.GetMailboxCountAsync()

'  To keep the example short, we'll skip handling failures.
'  The failures would be handled in the same way as shown above.

success = task.Run()
success = task.Wait(maxWaitMs)
numMessages = task.GetResultInt()

If (numMessages = 0) Then

End If

set email = Server.CreateObject("Chilkat_9_5_0.Email")

For i = 1 To numMessages

    ' task is a Chilkat_9_5_0.Task
    Set task = mailman.FetchByMsgnumAsync(i)
    If (task Is Nothing ) Then
        Response.Write "<pre>" & Server.HTMLEncode( mailman.LastErrorText) & "</pre>"

    End If

    success = task.Run()
    success = task.Wait(maxWaitMs)
    If (Not success Or (task.StatusInt <> 7) Or (task.TaskSuccess <> 1)) Then
        If (Not success) Then
            '  The task.LastErrorText applies to the Wait method call.
            Response.Write "<pre>" & Server.HTMLEncode( task.LastErrorText) & "</pre>"
        Else
            '  The ResultErrorText applies to the underlying task method call (i.e. the FetchByMsgnum)
            Response.Write "<pre>" & Server.HTMLEncode( task.Status) & "</pre>"
            Response.Write "<pre>" & Server.HTMLEncode( task.ResultErrorText) & "</pre>"
        End If

    End If

    '  Each Chilkat object that can be a return value of an asynchronous task will
    '  have a method named LoadTaskResult.  The object returned in the underlying
    '  asynchronous method call is retrieved by calling LoadTaskResult.

    '  To say it another way: The application will provide a pre-existing object of
    '  the desired return type (in this case it is an email object).  This object is
    '  loaded by calling LoadTaskResult.

    success = email.LoadTaskResult(task)

    If (Not success) Then
        Response.Write "<pre>" & Server.HTMLEncode( email.LastErrorText) & "</pre>"

    Else
        Response.Write "<pre>" & Server.HTMLEncode( email.From & ": " & email.Subject & "\n") & "</pre>"
    End If

Next

%>
</body>
</html>

 

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