Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

DataFlex Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(DataFlex) 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

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoChilkatGlob
    Boolean iSuccess
    Handle hoMailman
    Variant vTask
    Handle hoTask
    Integer iMaxWaitMs
    Integer iNumMessages
    Handle hoEmail
    Integer i
    String sTemp1
    String sTemp2
    Integer iTemp1
    Boolean bTemp1

    // All Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    Get Create (RefClass(cComChilkatGlobal)) To hoChilkatGlob
    If (Not(IsComObjectCreated(hoChilkatGlob))) Begin
        Send CreateComObject of hoChilkatGlob
    End
    Get ComUnlockBundle Of hoChilkatGlob "Anything for 30-day trial." To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoChilkatGlob To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatMailMan)) To hoMailman
    If (Not(IsComObjectCreated(hoMailman))) Begin
        Send CreateComObject of hoMailman
    End

    // Set the POP3 server's hostname
    Set ComMailHost Of hoMailman To "pop.someMailServer.com"

    // Set the POP3 login/password and any other requirements..
    Set ComPopUsername Of hoMailman To "myLogin"
    Set ComPopPassword Of hoMailman To "myPassword"
    Set ComPopSsl Of hoMailman To True
    Set ComMailPort Of hoMailman To 995

    // Connect to the POP3 server:
    Get ComPop3BeginSessionAsync Of hoMailman To vTask
    If (IsComObject(vTask)) Begin
        Get Create (RefClass(cComChilkatTask)) To hoTask
        Set pvComObject Of hoTask To vTask
    End
    Get ComLastMethodSuccess Of hoMailman To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Start the background task.
    Get ComRun Of hoTask To iSuccess
    If (Not iSuccess) Begin
        Get ComLastErrorText Of hoTask To sTemp1
        Showln sTemp1
        Send Destroy of hoTask
        Procedure_Return
    End

    // Wait for the POP3 connect task to finish.
    // The True/False returned by Wait applies to the Wait method call, not the task.
    Move 30000 To iMaxWaitMs
    Get ComWait Of hoTask iMaxWaitMs To iSuccess
    Get ComStatusInt Of hoTask To iTemp1
    Get ComTaskSuccess Of hoTask To bTemp1
    If (Not iSuccess Or (iTemp1 <> 7) Or (bTemp1 <> True)) Begin
        If (Not iSuccess) Begin
            // The task.LastErrorText applies to the Wait method call.
            Get ComLastErrorText Of hoTask To sTemp1
            Showln sTemp1
        End
        Else Begin
            // The ResultErrorText applies to the underlying task method call (i.e. the Pop3BeginSession)
            Get ComStatus Of hoTask To sTemp1
            Showln sTemp1
            Get ComResultErrorText Of hoTask To sTemp1
            Showln sTemp1
        End

        Send Destroy of hoTask
        Procedure_Return
    End

    Send Destroy of hoTask

    // Get the number of messages in the mailbox.
    Get ComGetMailboxCountAsync Of hoMailman To vTask
    If (IsComObject(vTask)) Begin
        Get Create (RefClass(cComChilkatTask)) To hoTask
        Set pvComObject Of hoTask To vTask
    End

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

    Get ComRun Of hoTask To iSuccess
    Get ComWait Of hoTask iMaxWaitMs To iSuccess
    Get ComGetResultInt Of hoTask To iNumMessages
    Send Destroy of hoTask
    If (iNumMessages = 0) Begin
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    For i From 1 To iNumMessages

        Get ComFetchByMsgnumAsync Of hoMailman i To vTask
        If (IsComObject(vTask)) Begin
            Get Create (RefClass(cComChilkatTask)) To hoTask
            Set pvComObject Of hoTask To vTask
        End
        Get ComLastMethodSuccess Of hoMailman To bTemp1
        If (bTemp1 = False) Begin
            Get ComLastErrorText Of hoMailman To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        Get ComRun Of hoTask To iSuccess
        Get ComWait Of hoTask iMaxWaitMs To iSuccess
        Get ComStatusInt Of hoTask To iTemp1
        Get ComTaskSuccess Of hoTask To bTemp1
        If (Not iSuccess Or (iTemp1 <> 7) Or (bTemp1 <> True)) Begin
            If (Not iSuccess) Begin
                // The task.LastErrorText applies to the Wait method call.
                Get ComLastErrorText Of hoTask To sTemp1
                Showln sTemp1
            End
            Else Begin
                // The ResultErrorText applies to the underlying task method call (i.e. the FetchByMsgnum)
                Get ComStatus Of hoTask To sTemp1
                Showln sTemp1
                Get ComResultErrorText Of hoTask To sTemp1
                Showln sTemp1
            End

            Send Destroy of hoTask
            Procedure_Return
        End

        // 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.  

        Get ComLoadTaskResult Of hoEmail vTask To iSuccess
        Send Destroy of hoTask

        If (Not iSuccess) Begin
            Get ComLastErrorText Of hoEmail To sTemp1
            Showln sTemp1
            Procedure_Return
        End
        Else Begin
            Get ComFrom Of hoEmail To sTemp1
            Get ComSubject Of hoEmail To sTemp2
            Showln sTemp1 ": " sTemp2 (character(10))
        End

    Loop



End_Procedure

 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.