Convert each email attachment to different format Leave feedback

GroupDocs.Conversion provides a flexible API to control the conversion of documents that contains other documents.

The following code snippet shows how to convert each attachment to a different format based on the attachment type:

With v24.10 and later:

var index = 1;
LoadOptions LoadOptionsProvider(LoadContext loadContext)
{
    if (loadContext.SourceFormat == EmailFileType.Eml)
    {
        return new EmailLoadOptions
        {
            ConvertOwned = true, 
            ConvertOwner = true,
            Depth = 2
        };
    }
    return null;
}

Stream ConvertedStreamProvider(SaveContext saveContext)
{
    string outputFile = $"converted-{index++}.{saveContext.TargetFormat.Extension}";
    return new FileStream(outputFile, FileMode.Create);
}

ConvertOptions ConvertOptionsProvider(ConvertContext convertContext)
{
    if (convertContext.SourceFormat == EmailFileType.Eml)
    {
        return new WordProcessingConvertOptions();
    }
    
    if (convertContext.SourceFormat == WordProcessingFileType.Txt)
    {
        return new PdfConvertOptions();
    }
    return new ImageConvertOptions();
}

using (var converter = new Converter("sample_with_attachments.eml", LoadOptionsProvider))
{
    converter.Convert(ConvertedStreamProvider, ConvertOptionsProvider);
}

Before v24.10:

var index = 1;
LoadOptions LoadOptionsProvider(FileType sourceType)
{
    if (sourceType == EmailFileType.Eml)
    {
        return new EmailLoadOptions
        {
            ConvertOwned = true, 
            ConvertOwner = true,
            Depth = 2
        };
    }
    return null;
}

Stream ConvertedStreamProvider(FileType targetType)
{
    string outputFile = $"converted-{index++}.{targetType.Extension}";
    return new FileStream(outputFile, FileMode.Create);
}

ConvertOptions ConvertOptionsProvider(string sourceDocumentName, FileType sourceType)
{
    if (sourceType == EmailFileType.Eml)
    {
        return new WordProcessingConvertOptions();
    }
    
    if (sourceType == WordProcessingFileType.Txt)
    {
        return new PdfConvertOptions();
    }
    return new ImageConvertOptions();
}

using (var converter = new Converter("sample_with_attachments.eml", LoadOptionsProvider))
{
    converter.Convert(ConvertedStreamProvider, ConvertOptionsProvider);
}

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Convert each email attachment to different format Leave feedback

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