Membuat dynamic image thumbnail

public class ImageHandler : IHttpHandler

{ // ukuran maksimal dari Thumbnailnya

const int MaxDim = 120;
public void ProcessRequest(HttpContext ctx) {

ctx.Response.ContentType = "image/jpeg";

ctx.Response.Cache.SetCacheability(HttpCacheability.Public);

ctx.Response.Cache.SetExpires(DateTime.Now.AddDays(1));

// mencari directory dimana imagenya tersimpan

string imageDir = ConfigurationSettings.AppSettings["imageDir"];

imageDir = Path.Combine(ctx.Request.PhysicalApplicationPath, imageDir);

// mencari image yang dicari

string file = ctx.Request.QueryString["File"];

file = Path.Combine(imageDir, file);

// load image

using (Image img = new Bitmap(file)) {

// mengubah ukuran gambar

int h = img.Height;

int w = img.Width;

int b = h > w ? h : w;

double per = (b > MaxDim) ? (MaxDim * 1.0) / b : 1.0;

h = (int)(h * per);

w = (int)(w * per);
// membuat thumbnail image

using (Image img2 = img.GetThumbnailImage(w, h,

ew Image.GetThumbnailImageAbort(Abort), IntPtr.Zero))

{

// men-save hasilnya menggunakan response stream

img2.Save(ctx.Response.OutputStream,

System.Drawing.Imaging.ImageFormat.Jpeg);

}

}

}

public bool IsReusable { get { return true; } }
private bool Abort() { return false; }}