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(C# UWP/WinRT) Using Replace Patterns in EmailSee more Email Object ExamplesDemonstrates how to use the replace patterns (mail-merge) feature in Chilkat MailMan.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; // --------------------------------------------------------------------- // Create an email template for sending. Chilkat.Email emailTemplate = new Chilkat.Email(); // 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"... emailTemplate.Subject = "Hello FIRST_NAME,"; emailTemplate.From = "john@example.com"; emailTemplate.AddTo("FIRST_NAME","RECIPIENT_EMAIL"); emailTemplate.SetHtmlBody("<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: emailTemplate.SaveEml("qa_output/emailTemplate.eml"); // 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. Chilkat.MailMan mailman = new Chilkat.MailMan(); emailTemplate.SetReplacePattern("FIRST_NAME","Elon"); emailTemplate.SetReplacePattern("RECIPIENT_EMAIL","elon.musk@example.com"); emailTemplate.SetReplacePattern("PRODUCT_NAME","Twitter Corporation"); // 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. string mime = mailman.RenderToMime(emailTemplate); Debug.WriteLine(mime); // 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. int count = emailTemplate.NumReplacePatterns; Debug.WriteLine("Number of replace patterns: " + Convert.ToString(count)); int i = 0; while (i < count) { // 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 Debug.WriteLine(emailTemplate.GetReplacePattern(i) + ": " + emailTemplate.GetReplaceString(i)); i = i + 1; } // Or lookup a replacement pattern by name: string name = "FIRST_NAME"; Debug.WriteLine(name + " = " + emailTemplate.GetReplaceString2(name)); // 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.. mailman.SmtpHost = "smtp.mail.us-west-2.awsapps.com"; mailman.SmtpSsl = true; mailman.SmtpPort = 465; mailman.SmtpUsername = "john@example.com"; mailman.SmtpPassword = "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" // } // ... // ] // } Chilkat.JsonObject json = new Chilkat.JsonObject(); success = json.LoadFile("qa_data/json/mail_merge.json"); if (success == false) { Debug.WriteLine(json.LastErrorText); return; } string emailAddr; string firstName; string product; i = 0; count = json.SizeOfArray("mail_merge"); while (i < count) { json.I = i; emailAddr = json.StringOf("mail_merge[i].to"); firstName = json.StringOf("mail_merge[i].name"); product = json.StringOf("mail_merge[i].product"); emailTemplate.SetReplacePattern("FIRST_NAME",firstName); emailTemplate.SetReplacePattern("RECIPIENT_EMAIL",emailAddr); emailTemplate.SetReplacePattern("PRODUCT_NAME",product); success = await mailman.SendEmailAsync(emailTemplate); if (success == false) { Debug.WriteLine(mailman.LastErrorText); return; } Debug.WriteLine("Send email to " + emailAddr); i = i + 1; } Debug.WriteLine("Success."); |
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