public async Task <bool> GenerateImagesAndThumbnailsFromUrl()
{
var books = _dbContext.Books.Include(x => x.Image);
foreach (var book in books)
{
if (book.Image == null && !string.IsNullOrEmpty(book.ImageUrl))
{
var data = CustomFunctions.ImageToByteArray(book.ImageUrl);
var newImage = new Image {
Data = data
};
book.Image = newImage;
}
if (book.Thumbnail == null && !string.IsNullOrEmpty(book.ThumbnailUrl))
{
System.Drawing.Image img;
System.Drawing.Image thumb;
using (var ms = new MemoryStream(book.Image.Data))
{
img = System.Drawing.Image.FromStream(ms);
}
using (MemoryStream ms = new MemoryStream())
{
thumb = img.GetThumbnailImage(300, 390, () => false, IntPtr.Zero);
thumb.Save(ms, ImageFormat.Jpeg);
var newThumbnail = new Thumbnail {
Data = ms.ToArray()
};
book.Thumbnail = newThumbnail;
}
}
}
await _dbContext.SaveChangesAsync();
return(true);
}