public static byte[] GetThumbnailImage(string fileName, byte[] imageBytes, int size)
{
if (size <= 0)
{
throw new Exception("ErrorCode : 1390/10/23-22:04 : " + QueryStringCoder.Code("اندازه درخواستي جهت تامبنيل تصوير(" + size + ") مجاز نمي باشد!"));
}
ImageFormat imageType = ConvertFileExtensionToImageFormat(GetFileType(fileName));
MemoryStream ms = new MemoryStream(imageBytes);
ms.Position = 0;
System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
int width;
int height;
if (img.Height > img.Width)
{
height = size.ToInt();
width = img.Width * size.ToInt() / img.Height;
}
else //if (img.height <= img.width)
{
width = size.ToInt();
height = img.Height * size.ToInt() / img.Width;
}
if (imageType == ImageFormat.Png || imageType == ImageFormat.Gif)
{
System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
img = img.GetThumbnailImage(width, height, myCallback, IntPtr.Zero);
imageType = ImageFormat.Png;
}
else
{
img = ImageResizer.ConstrainProportions(img, height, Dimensions.Height);
}
MemoryStream thumbnailImageStream = new MemoryStream();
thumbnailImageStream.Position = 0;
img.Save(thumbnailImageStream, imageType);
return(thumbnailImageStream.ToArray());
}