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(DataFlex) Using Replace Patterns in Email

See more Email Object Examples

Demonstrates how to use the replace patterns (mail-merge) feature in Chilkat MailMan.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vEmailTemplate
    Handle hoEmailTemplate
    Handle hoMailman
    String sMime
    Integer iCount
    Integer i
    String sName
    Handle hoJson
    String sEmailAddr
    String sFirstName
    String sProduct
    String sTemp1
    String sTemp2

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // ---------------------------------------------------------------------
    // Create an email template for sending.
    Get Create (RefClass(cComChilkatEmail)) To hoEmailTemplate
    If (Not(IsComObjectCreated(hoEmailTemplate))) Begin
        Send CreateComObject of hoEmailTemplate
    End

    // We're going to replace "FIRST_NAME" with an actual name.
    // We arbitrarily chose "FIRST_NAME".  We can choose anything, such as "CUSTOMER_NAME" or "THE_RECIPIENT_NAME"...
    Set ComSubject Of hoEmailTemplate To "Hello FIRST_NAME,"

    Set ComFrom Of hoEmailTemplate To "john@example.com"
    Get ComAddTo Of hoEmailTemplate "FIRST_NAME" "RECIPIENT_EMAIL" To iSuccess

    Send ComSetHtmlBody To hoEmailTemplate "<html><body><h2>Hello FIRST_NAME,</h2><p>Your order for PRODUCT_NAME has been shipped.</p></body></html>"

    // If the email is saved to a file, we can see what it contains:
    Get ComSaveEml Of hoEmailTemplate "qa_output/emailTemplate.eml" To iSuccess

    // For example:

    // MIME-Version: 1.0
    // Date: Tue, 26 Apr 2022 07:10:52 -0500
    // Message-ID: <715CF231A9F07B0B9FDB073518CD94138D791866@XYZ>
    // Content-Type: text/html; charset=us-ascii
    // Content-Transfer-Encoding: 7bit
    // X-Priority: 3 (Normal)
    // Subject: Hello FIRST_NAME,
    // From: john@example.com
    // CKX-Bounce-Address: john@example.com
    // To: FIRST_NAME <RECIPIENT_EMAIL>
    // 
    // <html><body><h2>Hello FIRST_NAME,</h2><p>Your order for PRODUCT_NAME has been shipped.</p></body></html>

    // Note: Ignore the CKX-Bounce-Address header.  It is automatically removed by Chilkat prior to sending.
    // All "CKX-" headers are automatically removed prior to sending.

    // ---------------------------------------------------------------------
    // Demonstrate replace patterns by setting and then rendering to MIME.

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

    Get ComSetReplacePattern Of hoEmailTemplate "FIRST_NAME" "Elon" To iSuccess
    Get ComSetReplacePattern Of hoEmailTemplate "RECIPIENT_EMAIL" "elon.musk@example.com" To iSuccess
    Get ComSetReplacePattern Of hoEmailTemplate "PRODUCT_NAME" "Twitter Corporation" To iSuccess

    // Render to MIME to see what we get.
    // Note: When the MailMan sends an email, it renders the email to MIME and then sends.
    // The rendering process is to do replacements, or possibly sign, encrypt, etc.
    // When MailMan.SendEmail is called, internally the email is rendered, and the rendered email is sent.
    // The equivalent to MailMan.Send email is to call email.RenderToMime followed by MailMan.SendMime.
    Get pvComObject of hoEmailTemplate to vEmailTemplate
    Get ComRenderToMime Of hoMailman vEmailTemplate To sMime
    Showln sMime

    // This is the rendered MIME:

    // MIME-Version: 1.0
    // Date: Tue, 26 Apr 2022 07:25:49 -0500
    // Message-ID: <750582BCDC891C67B48CEE2293C08B902C3891E9@XYZ>
    // Content-Type: text/html; charset=us-ascii
    // Content-Transfer-Encoding: 7bit
    // X-Priority: 3 (Normal)
    // Subject: Hello Elon,
    // From: john@example.com
    // To: Elon <elon.musk@example.com>
    // 
    // <html><body><h2>Hello Elon,</h2><p>Your order for Twitter Corporation has been shipped.</p></body></html>

    // Note: When rendering, the Date and Message-ID headers are automatically regenerated.

    // ---------------------------------------------------------------------
    // An application can see what replacement patterns it previously set by calling SetReplacePattern multiple times.
    Get ComNumReplacePatterns Of hoEmailTemplate To iCount
    Showln "Number of replace patterns: " iCount

    Move 0 To i
    While (i < iCount)
        // Note: The GetReplaceString method was found to not be working correctly.  It was returning the same value as GetReplacePattern.
        // It is fixed in Chilkat v9.5.0.91
        Get ComGetReplacePattern Of hoEmailTemplate i To sTemp1
        Get ComGetReplaceString Of hoEmailTemplate i To sTemp2
        Showln sTemp1 ": " sTemp2
        Move (i + 1) To i
    Loop

    // Or lookup a replacement pattern by name:
    Move "FIRST_NAME" To sName
    Get ComGetReplaceString2 Of hoEmailTemplate sName To sTemp1
    Showln sName " = " sTemp1

    // Sample output:

    // Number of replace patterns: 3
    // FIRST_NAME: Elon
    // RECIPIENT_EMAIL: elon.musk@example.com
    // PRODUCT_NAME: Twitter Corporation
    // FIRST_NAME = Elon

    // ---------------------------------------------------------------------
    // Finally... demonstrate sending emails using the replacement patterns.
    // 

    // Set our mail server settings..
    Set ComSmtpHost Of hoMailman To "smtp.mail.us-west-2.awsapps.com"
    Set ComSmtpSsl Of hoMailman To True
    Set ComSmtpPort Of hoMailman To 465

    Set ComSmtpUsername Of hoMailman To "john@example.com"
    Set ComSmtpPassword Of hoMailman To "the_password"

    // Imagine we have data in JSON format, and we wish to send the templated email to each recipient...
    // 

    // {
    // 	"mail_merge" : [
    // 		{
    // 			"to": "mary@example.com",
    // 			"name": "Mary",
    // 			"product": "Widget 1" 
    // 		},
    // 		{
    // 			"to": "robert@example.com",
    // 			"name": "Robert",
    // 			"product": "Widget 2"
    // 		}	
    // 		...
    // 	]
    // }

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComLoadFile Of hoJson "qa_data/json/mail_merge.json" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJson To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Move 0 To i
    Get ComSizeOfArray Of hoJson "mail_merge" To iCount
    While (i < iCount)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "mail_merge[i].to" To sEmailAddr
        Get ComStringOf Of hoJson "mail_merge[i].name" To sFirstName
        Get ComStringOf Of hoJson "mail_merge[i].product" To sProduct

        Get ComSetReplacePattern Of hoEmailTemplate "FIRST_NAME" sFirstName To iSuccess
        Get ComSetReplacePattern Of hoEmailTemplate "RECIPIENT_EMAIL" sEmailAddr To iSuccess
        Get ComSetReplacePattern Of hoEmailTemplate "PRODUCT_NAME" sProduct To iSuccess

        Get pvComObject of hoEmailTemplate to vEmailTemplate
        Get ComSendEmail Of hoMailman vEmailTemplate To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoMailman To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        Showln "Send email to " sEmailAddr

        Move (i + 1) To i
    Loop

    Showln "Success."


End_Procedure

 

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