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C:\Images\MyImage_thumb_750.png
const string file = @"C:\Images\MyImage.png"; var f = new ImageFile(file); f.SaveThumbnail(0.75);
/// <summary> /// Creates a thumbnail image from a file spec in the calling URL. /// </summary> public class MakeThumbnail : System.Web.UI.Page { private void Page_Load(object sender, System.EventArgs e) { // get the file name -- fall800.jpg string file = Request.QueryString["file"]; // create an image object, using the filename we just retrieved System.Drawing.Image image = System.Drawing.Image.FromFile(Server.MapPath(file)); // create the actual thumbnail image System.Drawing.Image thumbnailImage = image.GetThumbnailImage(64, 64, new System.Drawing.Image.GetThumbnailImageAbort( ThumbnailCallback), IntPtr.Zero); // make a memory stream to work with the image bytes MemoryStream imageStream = new MemoryStream(); // put the image into the memory stream thumbnailImage.Save(imageStream, System.Drawing.Imaging.Imageformat.Jpeg); // make byte array the same size as the image byte[] imageContent = new Byte[imageStream.Length]; // rewind the memory stream imageStream.Position = 0; // load the byte array with the image imageStream.Read(imageContent, 0, (int)imageStream.Length); // return byte array to caller with image type Response.ContentType = "image/jpeg"; Response.BinaryWrite(imageContent); } /// <summary> /// Required, but not used /// </summary> /// <returns>true</returns> public bool ThumbnailCallback() { return true; } // ... non-applicable infrastructure code removed for clarity ... }
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