How to save mutipage in tiff

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C#

ASP.NET

.NET

Hi i am using the below code for jpg n tiff compression.
for jpg its working fine but for tiff it is not takin multipages,instead of takes only 1 page evn if the buffer has 2 pages in it..
kindly help plzzz

{x_dpi = float.Parse(ds.Tables[0].Rows[0]["XPOS"].ToString());
            y_dpi = float.Parse(ds.Tables[0].Rows[0]["YPOS"].ToString());
            _bmpW = Int32.Parse(ds.Tables[0].Rows[0]["WIDTH"].ToString());
            _bmpH = Int32.Parse(ds.Tables[0].Rows[0]["HEIGHT"].ToString());
            IMAGE_TYPE = ds.Tables[0].Rows[0]["IMAGE_TYPE"].ToString();

            int bmpW = _bmpW;
            //New image target width 
            int bmpH = _bmpH;
            Int32 newWidth = bmpW;
            Int32 newHeight = bmpH;
            HttpFileCollection files = HttpContext.Current.Request.Files;
            HttpPostedFile uploadfile = files["RemoteFile"];

            Bitmap upBmp = (Bitmap)Bitmap.FromStream(uploadfile.InputStream);
            Bitmap newBmp = new Bitmap(newWidth, newHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
            FileName = uploadfile.FileName;
            newBmp.SetResolution(x_dpi, y_dpi);
            //Get the uploaded image width and height 
            Double upWidth = upBmp.Width;
            Double upHeight = upBmp.Height;

           int newX = 0;
            //Set the new top left drawing position on the image canvas 
            int newY = 0;
            Double reDuce;
            //Keep the aspect ratio of image the same if not 4:3 and work out the newX and newY positions
            //to ensure the image is always in the centre of the canvas vertically and horizontally 
            if (upWidth > upHeight)
            {
                //Landscape picture 
                reDuce = newWidth / upWidth;
                //calculate the width percentage reduction as decimal 
                newHeight = ((Int32)(upHeight * reDuce));
                //reduce the uploaded image height by the reduce amount 
                newY = ((Int32)((bmpH - newHeight) / 2));
                //Position the image centrally down the canvas 
                newX = 0;
                //Picture will be full width 
            }
            else if (upWidth < upHeight)
            {
                //Portrait picture 
                reDuce = newHeight / upHeight;
                //calculate the height percentage reduction as decimal 
                newWidth = ((Int32)(upWidth * reDuce));
                //reduce the uploaded image height by the reduce amount 
                newX = ((Int32)((bmpW - newWidth) / 2));
                //Position the image centrally across the canvas 
                newY = 0;
                //Picture will be full hieght 
            }
            else if (upWidth == upHeight)
            {
                //square picture 
                reDuce = newHeight / upHeight;
                //calculate the height percentage reduction as decimal 
                newWidth = ((Int32)(upWidth * reDuce));
                //reduce the uploaded image height by the reduce amount 
                newX = ((Int32)((bmpW - newWidth) / 2));
                //Position the image centrally across the canvas 
                newY = ((Int32)((bmpH - newHeight) / 2));
                //Position the image centrally down the canvas 
            }
            //Create a new image from the uploaded picture using the Graphics class
            //Clear the graphic and set the background colour to white
            //Use Antialias and High Quality Bicubic to maintain a good quality picture
                       Graphics newGraphic = Graphics.FromImage(newBmp);

           try
            {
                //newGraphic.DrawImage(upBmp, newX, newY, newWidth, newHeight);
                EncoderParameters eps = new EncoderParameters(1);
                if (IMAGE_TYPE.ToUpper() == "JPG")
                {                    newGraphic.Clear(Color.White);
                    newGraphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                    newGraphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    newGraphic.DrawImage(upBmp, newX, newY, newWidth, newHeight);
                    newBmp.Save(Path + FileName, System.Drawing.Imaging.ImageFormat.Jpeg);
                }
                else if (IMAGE_TYPE.ToUpper() == "TIF" || IMAGE_TYPE.ToUpper() == "TIFF")
                {                    eps.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
                    //newBmp.BitsPerSample = 1;
                    //newBmp.SamplesPerPixel = 1;
                    System.Drawing.Imaging.Encoder myEncoder;
                    EncoderParameter myEncoderParameter;
                    EncoderParameters myEncoderParameters;
                    ImageCodecInfo myImageCodecInfo;
                    myEncoder = System.Drawing.Imaging.Encoder.Compression;
                    myEncoderParameters = new EncoderParameters(1);
                    // Save the image with a color depth of 24 bits per pixel.
                    //myEncoderParameter =
                    //    new EncoderParameter(myEncoder, 24L);
                    myEncoderParameter = new EncoderParameter(myEncoder, (long)3);
                    myEncoderParameters.Param[0] = myEncoderParameter;
                    myImageCodecInfo = GetEncoderInfo("image/tiff");
                    upBmp.Save(Path + FileName, myImageCodecInfo, myEncoderParameters);
                }
                else if (IMAGE_TYPE.ToUpper() == "PDF")
                {
                    eps.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression, (long)EncoderValue.CompressionCCITT4);
                    //newBmp.BitsPerSample = 1;
                    //newBmp.SamplesPerPixel = 1;
                    System.Drawing.Imaging.Encoder myEncoder;
                    EncoderParameter myEncoderParameter;
                    EncoderParameters myEncoderParameters;
                    ImageCodecInfo myImageCodecInfo;
                    myEncoder = System.Drawing.Imaging.Encoder.Compression;
                    myEncoderParameters = new EncoderParameters(1);
                    // Save the image with a color depth of 24 bits per pixel.
                    //myEncoderParameter =
                    //    new EncoderParameter(myEncoder, 24L);
                    myEncoderParameter = new EncoderParameter(myEncoder, (long)3);
                    myEncoderParameters.Param[0] = myEncoderParameter;
                    myImageCodecInfo = GetEncoderInfo("image/tiff");
                    newBmp.Save(Path + FileName, myImageCodecInfo, myEncoderParameters);
                }