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  1. PO
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    <p>Instead of working on a temporary file, you may work on the original file and save only the rotation on the last page. (EDIT : it seems to not work)</p> <hr> <p>EDIT : Clone only the first frame, add all other frame and rotate the last..</p> <p>Something like this :</p> <pre><code>public void rotateLastPage() { string inputfile = @"u:\\input.tiff"; Bitmap bmap = (Bitmap)Image.FromFile(inputfile); int max = bmap.GetFrameCount(FrameDimension.Page); try { EncoderParameters encoderParameters = GetEncoderParameters(bmap, EncoderValue.MultiFrame); ImageCodecInfo encoder = GetTiffEncoder(); var firstPage = (Image)bmap.Clone(); firstPage.Save(inputfile+".tmp", encoder, encoderParameters); for (int i = 1; i &lt; max - 1; i++) { bmap.SelectActiveFrame(FrameDimension.Page, i); encoderParameters = GetEncoderParameters(bmap, EncoderValue.FrameDimensionPage); firstPage.SaveAdd(bmap, encoderParameters); } bmap.SelectActiveFrame(FrameDimension.Page, max - 1); bmap.RotateFlip(RotateFlipType.Rotate90FlipNone); encoderParameters = GetEncoderParameters(bmap, EncoderValue.FrameDimensionPage); firstPage.SaveAdd(bmap, encoderParameters); firstPage.SaveAdd(GetEncoderParameters(EncoderValue.Flush)); } catch (Exception e) { Console.WriteLine(String.Format("Unable to rotate page {0} in file {1} due to {2}", max.ToString(), inputfile, e.Message)); } bmap.Dispose(); } private static EncoderParameters GetEncoderParameters(Image image, EncoderValue encoderValue) { EncoderParameters encoderParameters = new EncoderParameters(2); encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)encoderValue); encoderParameters.Param[1] = GetCompressionEncoder(image); return encoderParameters; } private static EncoderParameters GetEncoderParameters(EncoderValue encoderValue) { EncoderParameters encoderParameters = new EncoderParameters(1); encoderParameters.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.SaveFlag, (long)encoderValue); return encoderParameters; } private static EncoderParameter GetCompressionEncoder(Image image) { Int16 c = BitConverter.ToInt16(image.PropertyItems[Array.IndexOf(image.PropertyIdList, 0x103)].Value, 0); if (c == 4) { return new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4); } else if (c == 5) { return new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionLZW); } throw new ArgumentException("Only CCIT4 and LZW compressed images are allowed."); } private static ImageCodecInfo GetTiffEncoder() { ImageCodecInfo encoder = null; ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders(); for (int i = 0; i &lt; encoders.Length; i++) { if (encoders[i].MimeType == "image/tiff") { encoder = encoders[i]; } } if (encoder == null) { throw new NotSupportedException("Unable to find a tiff encoder."); } return encoder; } </code></pre>
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    1. POSaving multipage tiff without writing the whole file
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    1. PTAnswer
    1. USknaki02
    1. USknaki02
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      1. VTUpMod
    1. COI rewrote my code to match the posted code and it will rotate the last page in the file, but it will also reduce the pages in that file to just the last one. Did you run the posted code and get a different result then me?
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      1. USCodeReaper
    2. CO@CodeReaper, yes it seems to keep the first frames...
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      1. USknaki02
    3. COI have taken the posted code into a clean new project and ran it. If you replace the Console.WriteLine(...) with MessageBox.Show(...) I think you will see the exception that is thrown which causes the rotated image to not be saved. If the exception is not thrown there is only the last page left.
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