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Aspose.Email  for .NET
MSG

Add Text Watermark to MSG via C#

Build your own .NET apps to watermark MSG files using server-side APIs.

How to Watermark MSG File Using C#

In order to watermark MSG file, we’ll use

Aspose.Email for .NET

API which is a feature-rich, powerful and easy to use document manipulation API for C# platform. Open

NuGet

package manager, search for Aspose.Email and install. You may also use the following command from the Package Manager Console.

Command


PM> Install-Package Aspose.Email

Steps to Add Watermark to MSG via C#

You need the

aspose.email.dll

to try the following workflow in your own environment.

  • Load the HTML body of email message file
  • Load attachment and set its content
  • Set body content, if any
  • Save email file on disc

System Requirements

Aspose.Email for .NET is supported on all major operating systems. Just make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with .NET Framework, .NET Core, and Xamarin Platforms.
  • Development environment like Microsoft Visual Studio.
  • Aspose.Email for .NET referenced in your project.
 

Add Watermark to MSG - C#


mail.Attachments.Add("watermark", imageBytes);

var html = mail.BodyHtml;
var htmlDocument = new Aspose.Html.HTMLDocument(mail.BodyHtml, "");

var attachment = mail.Attachments.Find(x => x.LongFileName == "watermark");
attachment.SetContentId("watermark");

var bodyHtml = htmlDocument.Body.InnerHTML;

var watermarkHtml = $@"watermarkHtml";

htmlDocument.Body.InnerHTML = watermarkHtml;

var folderPath = Path.Combine(Config.Configuration.OutputDirectory, Guid.NewGuid().ToString());
var filePath = Path.Combine(folderPath, "Merged.html");

htmlDocument.Save(filePath);

var content = System.IO.File.ReadAllText(filePath);

Directory.Delete(folderPath, true);

mail.SetBodyContent(content, BodyContentType.Html);  
 
  • About Aspose.Email for .NET API

    Aspose.Email is a Microsoft Outlook and Thunderbird formats parsing solution. One can easily create, manipulate, convert email and storage formats such as MSG, EMLX, EML and MHT. Handling of email attachments, customization of message headers and implementation of different network protocols like POP3, IMAP & SMTP to send & receive emails is much easier. Its a standalone API and does not require Microsoft Outlook or any other software installation.

    Watermark MSG via Online App

    Other Supported Watermarking Formats

    Using C#, one can easily watermark different formats including.

    EML (Outlook Email Messages)