private static string GetNewImageName(string path, string oldname, imageSize size)
{
string newName = Path.GetFileNameWithoutExtension(path + oldname);
FileInfo info = new FileInfo(path + oldname);
switch (size)
{
case imageSize.Mini:
newName += "_mini" + info.Extension;
break;
case imageSize.Thumbnail:
newName += "_tn" + info.Extension;
break;
case imageSize.Small:
newName += "_sm" + info.Extension;
break;
case imageSize.Medium:
newName += "_med" + info.Extension;
break;
case imageSize.Large:
newName += "_large" + info.Extension;
break;
default:
newName += info.Extension;
break;
}
return(newName);
}
public static string ImageOtherSize(this string locationStore, imageSize seze)
{
var a = locationStore;
if (a.EndsWith(".jpg"))
{
a = a.Insert(a.Length - (".jpg").Length, "-" + seze.ToString());
}
return(a);
}
/// <summary>
/// Saves the image to disk.
/// </summary>
/// <param name="image">The image to save.</param>
/// <param name="targetSize">Target size of the image to save.</param>
/// <param name="path">The path where the image will be saved.</param>
/// <param name="oldName">The previous name of the image.</param>
/// <returns></returns>
public static string SaveImageToDisk(this Image image, imageSize targetSize, string path, string oldName)
{
Throw.IfArgumentNull(image, "image");
Throw.IfArgumentNullOrEmpty(path, "path");
Throw.IfArgumentNullOrEmpty(oldName, "oldName");
string newName = GetNewImageName(path, oldName, targetSize);
//get the codec needed
var i = ImageCodecInfo.GetImageEncoders();
var imgCodec = ImageCodecInfo.GetImageEncoders().FirstOrDefault(c => c.FormatID == image.RawFormat.Guid);
if (imgCodec == null)
{
imgCodec = ImageCodecInfo.GetImageEncoders().First(c => c.MimeType == "image/jpeg");
}
//make a paramater to adjust quality
var codecParams = new EncoderParameters(1);
//reduce to quality of 80 (from range of 0 (max compression) to 100 (no compression))
codecParams.Param[0] = new EncoderParameter(Encoder.Quality, 80L);
image.Save(Path.Combine(path, newName), imgCodec, codecParams);
return(Path.Combine(path, newName));
}
public static byte[] imgTosmall(this byte[] byteImageIn, imageSize tosize = imageSize.s800, long dpi = 72)
{
if (byteImageIn == null)
{
return(null);
}
byte[] currentByteImageArray = byteImageIn;
MemoryStream inputMemoryStream = new MemoryStream(byteImageIn);
Image fullsizeImage = Image.FromStream(inputMemoryStream);
double s = (double)(800 * 600);
if (fullsizeImage.Width * fullsizeImage.Height > s)
{
double ww = (double)fullsizeImage.Width / (int)tosize;
double hh = (double)fullsizeImage.Height / (int)tosize;
var w = fullsizeImage.Width / hh;
var h = fullsizeImage.Height / ww;
Bitmap fullSizeBitmap = new Bitmap(fullsizeImage, new Size((int)(w), (int)(h)));
MemoryStream resultStream = new MemoryStream();
fullSizeBitmap.Save(resultStream, fullsizeImage.RawFormat);
currentByteImageArray = resultStream.ToArray();
resultStream.Dispose();
resultStream.Close();
}
return(imgTosmallChengeDPI(currentByteImageArray, dpi));
}
