public async Task <string> UploadPhoto(IFormFile image, string currentDirectory)
{
if (image == null || image.Length == 0)
{
throw new NullReferenceException("no file chosen.");
}
var folderPath = _fileHandler.GetAbsolutePath(currentDirectory);
_fileHandler.CreateDirectory(folderPath);
var randomFileName = _fileHandler.GetRandomFileName(image.FileName);
var photoPath = _fileHandler.Combine(folderPath, randomFileName);
using (var stream = new FileStream(photoPath, FileMode.Create))
{
await image.CopyToAsync(stream);
}
return(randomFileName);
}