public IActionResult DeleteFile(string id, int presentationId, int courseId, int fileId)
{
PresentationFiles file = repository.PresentationFiles.FirstOrDefault(f => f.FileId == fileId);
string dirPath = Path.Combine(hostingEnvironment.WebRootPath, $@"UsersData\{id}\Presentations\");
string filePath = Path.Combine(dirPath, file.FileId.ToString() + ".pdf");
//delete file if exists
System.IO.File.Delete(filePath);
repository.DeleteFile(file.FileId);
return(RedirectToAction("EditPresentation", new { id, presentationId, courseId }));
}
