Convert PST or OST documents to different formats

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

The following code snippet shows how to convert each constituent file of the Outlook Offline Data File (OST) to a different format based on its content type:

With v24.10 and later:

var index = 1;
LoadOptions LoadOptionsProvider(LoadContext loadContext)
{
    if (loadContext.SourceFormat == EmailFileType.Ost)
    {
        return new PersonalStorageLoadOptions
        {
            Folder = @"Root - Mailbox", 
            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.Msg)
    {
        return new PdfConvertOptions();
    }
    return new WordProcessingConvertOptions();
}

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

Before v24.10:

var index = 1;
LoadOptions LoadOptionsProvider(FileType sourceType)
{
    if (sourceType == EmailFileType.Ost)
    {
        return new PersonalStorageLoadOptions
        {
            Folder = @"Root - Mailbox", 
            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.Msg)
    {
        return new PdfConvertOptions();
    }
    return new WordProcessingConvertOptions();
}

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