/// <summary>
/// Downloads the attachment as a stream.
/// </summary>
/// <param name="containerTitle">The container title.</param>
/// <param name="entityId">The entity id.</param>
/// <param name="fileName">Name of the file.</param>
/// <returns></returns>
public virtual Stream DownloadAttachment(string containerTitle, Guid entityId, string fileName)
{
var result = new MemoryStream();
SPSite site;
var web = GetDocumentStoreWeb(out site);
SPList list;
SPFolder folder;
if (SPDocumentStoreHelper.TryGetFolderFromPath(web, containerTitle, out list, out folder, String.Empty) == false)
{
return(null);
}
SPFile attachment;
if (SPDocumentStoreHelper.TryGetDocumentStoreAttachment(list, folder, entityId, fileName, out attachment) == false)
{
return(null);
}
var attachmentStream = attachment.OpenBinaryStream();
DocumentStoreHelper.CopyStream(attachmentStream, result);
result.Seek(0, SeekOrigin.Begin);
return(result);
}
private static void CreateOrUpdateCachedFile(SPFile spFile, SPDirectory directory)
{
using (var spFileStream = spFile.OpenBinaryStream())
{
using (var outputStream = directory.CreateCachedOutputAsStream(spFile.Name))
{
DocumentStoreHelper.CopyStream(spFileStream, outputStream);
outputStream.Flush();
}
}
directory.WriteCachedFileETag(spFile.Name, spFile.ETag);
}