Requirement : The requirement is to create a zip file from a set of document entries available in document handling, creating a download link and sends the link to user browser.

In this requirement we are using Microsoft Dynamics 365 for finance and operations classes – documentmanagement, ziparchive & ziparchiveentry.

Sample Code :

class RunnableClassZIP
{
    /// <summary>
    /// Runs the class with the specified arguments.
    /// </summary>
    /// <param name = "_args">The specified arguments.</param>
    public static void main(Args _args)
    {
        System.IO.Stream fileStream;
        System.IO.MemoryStream zipArchiveStream = new System.IO.MemoryStream();
        DocuRef docuRef;
        DocuValue docuValue;
        
        const str extensionZip = '.zip';
        const str zipFileName = 'myZipfile';
    
        using (System.IO.Compression.ZipArchive zipArchive = new System.IO.Compression.ZipArchive(
            zipArchiveStream,
            System.IO.Compression.ZipArchiveMode::Create,
            true))
        {
            while select docuRef
                join docuValue
            where docuValue.RecId   == docuRef.ValueRecId
            && docuRef.RefTableId   == 'your table id'
            && docuRef.RefRecId     == 'your rec id'
            {            
                // Creates the file entry in the zip folder.
                System.IO.Compression.ZipArchiveEntry fileEntry = zipArchive.CreateEntry(docuValue.filename());
            
                // Opens the created file entry and copies the binary file information of the original file to the file entry in the zip folder.
                using (System.IO.Stream fileEntryStream = fileEntry.Open())
                {
                    // Gets the file stream of the document attachment.
                    fileStream = DocumentManagement::getAttachmentStream(docuRef);
                    fileStream.CopyTo(fileEntryStream);
                }
            }

            // Send a download link of the created zip folder to the user.
            File::SendFileToUser(zipArchiveStream, zipFileName + extensionZip);
        }
    }

}