Extract attachments from Emails

To extract attachments from emails GetContainer method is used. This method returns the collection of ContainerItem objects.

Email Attachment can contain the following metadata:

NameDescription
content-typeThe MIME type of the attachment content

These metadata refer to a container element itself, not a document.

Here are the steps to extract an email text from email attachments:

  • Instantiate Parser object for the initial document;
  • Call GetContainer method and obtain collection of ContainerItem objects;
  • Check if collection isn’t null (container extraction is supported for the document);
  • Iterate through the collection and get container item names, sizes and obtain content.

The following example shows how to extract a text from email attachments:

// Create an instance of Parser class
using(Parser parser = new Parser(filePath))
{
    // Extract attachments from the container
    IEnumerable<ContainerItem> attachments = parser.GetContainer();
    // Check if container extraction is supported
    if(attachments == null)
    {
        Console.WriteLine("Container extraction isn't supported");
    }

    // Iterate over attachments
    foreach(ContainerItem item in attachments)
    {
		// Print the file path
		Console.WriteLine(item.FilePath);
       
        // Print metadata
        foreach (MetadataItem metadata in item.Metadata)
        {
            Console.WriteLine(string.Format("{0}: {1}", metadata.Name, metadata.Value));
        }

		try
        {
            // Create Parser object for the email content
            using (Parser attachmentParser = item.OpenParser())
            {
                // Extract an email text
                using (TextReader reader = attachmentParser.GetText())
                {
                    Console.WriteLine(reader == null ? "No text" : reader.ReadToEnd());
                }
            }
        }
        catch (UnsupportedDocumentFormatException)
        {
            Console.WriteLine("Isn't supported.");
        }
	}
}

More resources

GitHub examples

You may easily run the code above and see the feature in action in our GitHub examples:

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