Add watermarks to email attachments
The API allows you to add watermark to all the attachments of supported types in an email message as shown in the following code sample.
AdvancedUsage.AddingWatermarks.AddWatermarksToEmailAttachments.EmailAddWatermarkToAllAttachments
TextWatermark watermark = new TextWatermark("Test watermark", new Font("Arial", 19));
EmailLoadOptions loadOptions = new EmailLoadOptions();
// Constants.InMessageMsg is an absolute or relative path to your document. Ex: @"C:\Docs\message.msg"
using (Watermarker watermarker = new Watermarker(Constants.InMessageMsg, loadOptions))
{
EmailContent content = watermarker.GetContent<EmailContent>();
foreach (EmailAttachment attachment in content.Attachments)
{
// Check if the attached file is supported by GroupDocs.Watermark
IDocumentInfo info = attachment.GetDocumentInfo();
if (info.FileType != FileType.Unknown && !info.IsEncrypted)
{
// Load the attached document
using (Watermarker attachedWatermarker = attachment.CreateWatermarker())
{
// Add wateramrk
attachedWatermarker.Add(watermark);
// Save changes in the attached file
attachedWatermarker.Save();
}
}
}
// Save changes
watermarker.Save(Constants.OutMessageMsg);
}
Advanced use cases
More resources
GitHub examples
You may easily run the code above and see the feature in action in our GitHub examples:
Free online document watermarking App
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You are welcome to add watermark to PDF, DOC, DOCX, PPT, PPTX, XLS, XLSX, Emails and more with our free online Free Online Document Watermarking App.