Zip Email Attachments before Sending

Download: Chilkat .NET Assemblies

C# code demonstrating how to add file attachments and then Zip them so that a single Zip file attachment is sent with the email. This only requires Chilkat Mail, and not Chilkat Zip.

	bool success;

	// Create a mailman object for sending email.
	Chilkat.MailMan mailman = new Chilkat.MailMan();

	// Any string argument automatically begins the 30-day trial.
	mailman.UnlockComponent("30-day trial");

	// Set the SMTP server host.
	mailman.SmtpHost = "smtp.earthlink.net";

	// Create a simple email with a Zip file attachment.
	Chilkat.Email email = new Chilkat.Email();

	// This email will have both a plain-text body and an HTML body.
	email.Body = "This is the plain-text alternative";
	email.AddHtmlAlternativeBody("<html><body><b><font color='red' size='+1'>This is bold red text.</font></b></html>");
	email.Subject = "This email has a file attachment.";
	email.AddTo("Chilkat Support","support@chilkatsoft.com");
	email.From = "Hello World <hello@chilkatsoft.com>";

	// Add a file attachment.
	string contentType; 
	// Returns the content-type of the attachment (determined by the file extension)
	// This return value is for informational purposes only.
	contentType = email.AddFileAttachment("dude.gif");
	if (contentType == null) 
	{
		MessageBox.Show(email.LastErrorText);
		return;
	}

	// Add another file attachment.
	contentType = email.AddFileAttachment("dude2.gif");
	if (contentType == null) 
	{
		MessageBox.Show(email.LastErrorText);
		return;
	}

	// Replace the attachments with a single Zip archive that contains the files already attached.
	email.ZipAttachments("dudes.zip");

	// Send email, the recipient will receive an email with a single attachment (dudes.zip)
	// that contains 2 file: dude.gif and dude2.gif.
	success = mailman.SendEmail(email);
	if (success)
	{
		MessageBox.Show("Sent mail with Zip attachment!");
	}
	else
	{
		MessageBox.Show(mailman.LastErrorText);
	}

Important: The download for this example does not contain the ChilkatDotNet.dll which
must be downloaded and installed separately at http://www.chilkatsoft.com/downloads.asp.
Once installed, add a reference to the DLL in the project by following the instructions at
http://www.example-code.com/vbdotnet/step2.asp