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EML
eSign EML Formats in C#
Native and high performance EML message electronic signature using server-side Aspose.Email for .NET APIs, without the use of any software like Microsoft or Open Office, Adobe PDF.
Aspose.Email for .NET
Overview
How to Digitally Sign EML File Using C#
In order to electronically sign EML file, we’ll use
API which is a feature-rich, powerful and easy to use digital signature API for C# platform. Open
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 for e-Signing EML Files in C#
A basic message digital signature with
APIs can be done with just few lines of code. One can sign email processing documents by adding text, image or draw professional digital signature to the email files as well as save result in MSG and EML formats.
- Load all the EML files with full path.
- Set the style of text like font, font size, color etc.
- Set the Signature text.
- Save EML file, You will get the document with signature inserted.
System Requirements
Our APIs are supported on all major platforms and Operating Systems. Before executing the code below, please make sure that you have the following prerequisites on your system.
- Microsoft Windows or a compatible OS with .NET Framework, .NET Core, and Xamarin Platforms
- Development environment like Microsoft Visual Studio
- Aspose.Email for .NET DLL referenced in your project - Install from NuGet using the Download button above
e-Sign EML Files - C#
var mail = MapiHelper.GetMapiMessageFromFile(inputFilePath);
var htmlDocument = new Aspose.Html.HTMLDocument(mail.BodyHtml, "");
var element = htmlDocument.CreateElement("Signature");
element.InnerHTML = "Signature Text (Style it with css)";
htmlDocument.Body.AppendChild(element);
var folderPath = "directorypath";
var filePath = folderPath + "Merged.html";
htmlDocument.Save(filePath);
var content = System.IO.File.ReadAllText(filePath);
System.IO.File.Delete(filePath);
Directory.Delete(folderPath);
mail.SetBodyContent(content, BodyContentType.Html);
mail.Save(Path.Combine(outputFolderPath, Path.GetFileNameWithoutExtension(inputFilePath) + " Signed.eml"), new EmlSaveOptions(MailMessageSaveType.EmlFormat));