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Aspose.Email  for .NET
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OLM Viewer for .NET Applications

View OLM files programmatically in C# without Microsoft Outlook or Thunderbird dependencies.

 

How to View OLM Files Using an Advanced Email API

Enhance your .NET applications with Aspose.Email for .NET ! It is a feature-rich library designed to process various email file formats including OLM, Microsoft Outlook for Mac archive files. One of these features is accessing and viewing OLM files programmatically in .NET applications. Its advanced API provides functionality for extracting and displaying email content, attachments, and metadata directly from archive files without relying on third-party software like Microsoft Outlook.

Here are the primary features that make it an excellent choice for integrating file viewing into your projects:

  • Programmatic Access to OLM Content: Traverse OLM folders, access messages, and extract metadata such as sender, recipient, subject, and body.

  • HTML Rendering for Email Messages: Convert OLM emails into HTML format for viewing in web browsers or embedding into desktop applications.

  • Independence from External Software: No need for Outlook or other email clients, ensuring a lightweight and standalone solution.

  • Support for modern .NET environments: .NET Framework, .NET Core, and .NET Standard.

  • Attachment and Resource Handling: View and extract email attachments and embedded resources alongside message content.

OLM files are processed by converting their structure into a browser-friendly format with an access to folders, messages enumeration, and their saving in HTML format for visualization.

C# Email API Installation and Use to View OLM Files

To begin, install the API in your development environment:

  • Open NuGet package manager, search for Aspose.Email and click Install.

  • You may also use the following command in the Package Manager Console.

Command


PM> Install-Package Aspose.Email

Once installed, you can start coding.

Steps to View OLM via C#

Aspose.Email makes it easy for the developers to view the OLM file with just few lines of code.

  1. Use the OlmStorage.FromFile method to load the file.
  2. Access the “Inbox” folder by retrieving it with the GetFolder method (case-sensitive and recursive).
  3. Iterate through all messages in the folder using the EnumerateMapiMessages method.
  4. Save each message as an HTML file using the Save method and specifying SaveOptions.DefaultHtml . The file name is based on the message subject.

System Requirements

The library 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, Windows Azure, Mono or Xamarin Platforms
  • Development environment like Microsoft Visual Studio
  • Aspose.Email for .NET referenced in your project
 

C# code to view OLM

using (var olm = OlmStorage.FromFile("filename.olm"))
{
    var folder = olm.GetFolder("Inbox", true);

    foreach (var msg in folder.EnumerateMapiMessages())
    {
        // save message in html format
        msg.Save($"{msg.Subject}.html", SaveOptions.DefaultHtml);
    }
} 
 

View OLM in a Browser

Below you can see how an OLM file appears when rendered in a browser using the.NET library. By converting email messages into HTML format, the API allows seamless visualization of email content, including sender and recipient details, subject, and message body, directly in a browser interface. This feature enables developers to create intuitive and accessible email viewing solutions.

  • About the .NET API

    Aspose.Email for .NET is a powerful API designed for comprehensive email processing and management in .NET applications. It supports various email formats, including MSG, EML, PST, MBOX, and OLM, enabling developers to handle email creation, manipulation, conversion, and storage with ease. The API offers robust features such as folder traversal, attachment management, message rendering, and integration with protocols like IMAP, POP3, SMTP, and Microsoft Graph, making it a versatile tool for building advanced email-centric applications.

    Try Aspose.Email for Free

    Discover the full potential of the library with a free trial version. Visit the download page to explore its features and integrate powerful email functionality into your projects today.

    OLM Viewer Online

    Email File Viewer for Other Formats

    Aspose.Email for .NET extends its functionality beyond OLM files, supporting a variety of email formats. Developers can also use it to view the following:

    EML (Outlook Email Messages)
    EMLX (Apple Mail EMLX Format)
    ICS (iCalendar Files for Event Data)
    MBOX (Collections of Electronic Mail Messages)
    MSG (Microsoft Outlook Email Format)
    OFT (Outlook Email Templates)
    PST (Outlook Personal Storage Files)
    VCF (Virtual Card Files for Contact Information)