Looping the quality of an image

Question

Hi there I am looping through quality settings of a seaved jpg until it is the file size i want after it is saved it looks at the file and gets its size then does this loop I keep getting System.ArgumentException: Invalid parameter used I know this has somthing to do with the quality needing to be long which it is declared as...help!!! Below is the code of the whole page. If you remove the loop starting at if (FileLen > MaxSize) it runs fine void Page_Load(Object sender EventArgs e) { } void UploadBut_Click(Object sender EventArgs args) { Int32 ImageWidth = 400; string RootPath = \fuzzyd2\; string PicPath = pics\; string FolderPath = RootPath + PicPath; String Extension = .jpg; String MimeType = image/jpeg; long Quality = 100; long MaxSize = 50; String FilePath = Request.PhysicalApplicationPath + FolderPath; String UploadedFile = PhotoUpload.PostedFile.FileName; int ExtractPos = UploadedFile.LastIndexOf(\) + 1; //to retrieve only Filename from the complete path String UploadedFileName = UploadedFile.Substring(ExtractPosUploadedFile.Length - ExtractPos); String ImageName = UploadedFileName; Stream ImageStream = PhotoUpload.PostedFile.InputStream; if ( PhotoUpload.PostedFile.FileName != ) { SaveUploadImageAsJpeg(ImageStream FilePath ImageName ImageWidth FolderPath Extension MimeType Quality MaxSize PicPath); } } void SaveUploadImageAsJpeg(Stream ImageStream String FilePath String ImageName Int32 ImageWidthString FolderPathString ExtensionString MimeTypelong Quality long MaxSizeString PicPath) { UploadImage(ImageStream FilePath ImageName ImageWidth FolderPath Extension MimeType Quality MaxSize PicPath); } void UploadImage(Stream ImageStream String FilePath String ImageName Int32 ImageWidthString FolderPath String Extension String MimeType long Quality long MaxSizeString PicPath ) { try { System.Drawing.Image UploadedImage = System.Drawing.Image.FromStream(ImageStream); decimal oldWidth = UploadedImage.Width; decimal oldHeight = UploadedImage.Height; if (oldWidth > ImageWidth){ oldHeight = (ImageWidth/oldWidth)* oldHeight; oldWidth = ImageWidth; } int new_height = Convert.ToInt32(oldHeight); int new_width = Convert.ToInt32(oldWidth); Bitmap smallerImg = new Bitmap(new_width new_height); Graphics g = Graphics.FromImage(smallerImg); foreach (PropertyItem pItem in UploadedImage.PropertyItems) { smallerImg.SetPropertyItem(pItem); } g.DrawImage(UploadedImage 0 0 new_width new_height); UploadedImage.Dispose(); EncoderParameters myParams = new EncoderParameters(1); DateTime MyDate = DateTime.Now; String MyString = MyDate.ToString(ddMMyyhhmmss) ; //Quality = Quality - 10; myParams.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality Quality); smallerImg.Save( FilePath + MyString + Extension GetEncoderInfo(MimeType) myParams); FileInfo fi = new FileInfo(FilePath + MyString + Extension) ; smallerImg.Dispose(); decimal FileLen = (fi.Length/1000); if (FileLen > MaxSize){ while (FileLen > MaxSize){ fi = new FileInfo(FilePath + MyString + Extension) ; FileLen = (fi.Length/1000); Quality = Quality - 1; MyString = MyDate.ToString(ddMMyyhhmmss) ; myParams = new EncoderParameters(1); myParams.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality Quality); smallerImg.Save( FilePath + MyString + Extension GetEncoderInfo(MimeType) myParams); smallerImg.Dispose(); } } Response.Write(FileLen+ ); Response.Write(Quality); Image2.AlternateText = Thumbnail; Image2.ImageUrl=PicPath + MyString + Extension; } finally { } } private ImageCodecInfo GetEncoderInfo(string mimeType) { int j; ImageCodecInfo[] encoders; encoders = ImageCodecInfo.GetImageEncoders(); for(j = 0; j -1) || (fileName.IndexOf(.jpeg) > -1) || (fileName.IndexOf(.gif) > -1)) args.IsValid = true; } Photo: