Tif文件合并类

using System;

using System.Collections;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Imaging;

using System.IO;

using System.Linq;

namespace Common

{

    /// <summary>

    /// Title Tif文件合并类

    /// Author：ward

    /// </summary>

    public class Tiff

    {

        /// <summary>

        /// 获取图像页数

        /// </summary>

        /// <param name="imagePath"></param>

        /// <returns></returns>

        public static int GetPageNumber(string imagePath)

        {

            using (Image image = Bitmap.FromFile(imagePath))

            {

                Guid objGuid = image.FrameDimensionsList[];

                FrameDimension objDimension = new FrameDimension(objGuid);

                return image.GetFrameCount(objDimension);

            }

        }

        /// <summary>

        /// 将给定的文件 拼接输出到指定的tif文件路径

        /// </summary>

        /// <param name="imageFiles">文件路径列表</param>

        /// <param name="outFile">拼接后保存的 tif文件路径</param>

        /// <param name="compressEncoder">压缩方式,建议CompressionCCITT4</param>

        public static void JoinTiffImages(ArrayList imageFiles, string outFile, EncoderValue compressEncoder)

        {

            //如果只有一个文件，直接复制到目标

            if (imageFiles.Count == )

            {

                File.Copy((string)imageFiles[], outFile, true);

                return;

            }

            Encoder enc = Encoder.SaveFlag;

            EncoderParameters ep = new EncoderParameters();

            ep.Param[] = new EncoderParameter(enc, (long)EncoderValue.MultiFrame);

            ep.Param[] = new EncoderParameter(Encoder.Compression, (long)compressEncoder);

            Bitmap pages = null;

            int frame = ;

            ImageCodecInfo info = GetEncoderInfo("image/tiff");

            foreach (string strImageFile in imageFiles)

            {

                if (frame == )

                {

                    pages = (Bitmap)Image.FromFile(strImageFile);

                    //保存第一个tif文件 到目标处

                    pages.Save(outFile, info, ep);

                }

                else

                {

                    //保存好第一个tif文件后，其余 设置为添加一帧到 图像中

                    ep.Param[] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);

                    Bitmap bm = (Bitmap)Image.FromFile(strImageFile);

                    pages.SaveAdd(bm, ep);

                    bm.Dispose();

                }

                if (frame == imageFiles.Count - )

                {

                    //flush and close.

                    ep.Param[] = new EncoderParameter(enc, (long)EncoderValue.Flush);

                    pages.SaveAdd(ep);

                }

                frame++;

            }

            pages.Dispose(); //释放资源

            return;

        }

        /// <summary>

        /// 拼接两个tif文件 保存到文件2中

        /// </summary>

        /// <param name="filePath">tif文件1</param>

        /// <param name="targetFile">tif文件2</param>

        public static void AppendToTiff(string filePath, string targetFile)

        {

            ArrayList list = new ArrayList(); //保存所有 tif文件路径

            #region 分割tif文件1

            string tempDirectory1 = string.Empty;

            list.AddRange(SplitTif(filePath, out tempDirectory1));

            #endregion

            #region 分割tif文件2

            string tempDirectory2 = string.Empty;

            list.AddRange(SplitTif(targetFile, out tempDirectory2));

            #endregion

            //2. 拼接所有tif页

            //2.1 删除原目标文件

            File.Delete(targetFile);

            //2.2 拼接 并按原路径生成tif文件

            JoinTiffImages(list, targetFile, EncoderValue.CompressionCCITT3);

            //3. 删除临时目录

            DirectoryInfo di2 = new DirectoryInfo(tempDirectory2);

            di2.Delete(true);

            DirectoryInfo di1 = new DirectoryInfo(tempDirectory1);

            di1.Delete(true);

        }

        /// <summary>

        /// 将给定文件  分割成多个tif文件 到临时目录下

        /// </summary>

        /// <param name="targetFile">目标文件</param>

        /// <param name="tempDirectory">临时目录路径，删除用</param>

        /// <returns>分割后多个文件路径集合</returns>

        public static ArrayList SplitTif(string targetFile, out string tempDirectory)

        {

            ArrayList list = new ArrayList();

            using (Image img = Image.FromFile(targetFile))

            {

                Guid guid = img.FrameDimensionsList[];

                System.Drawing.Imaging.FrameDimension dimension = new System.Drawing.Imaging.FrameDimension(guid);

                int nTotFrame = img.GetFrameCount(dimension); //tif总页数

                int nLoop = ; //索引

                //生成临时目录 存放 单tif页

                tempDirectory = Path.Combine(Path.GetDirectoryName(targetFile), Guid.NewGuid().ToString());

                if (!Directory.Exists(tempDirectory))

                {

                    Directory.CreateDirectory(tempDirectory);

                }

                EncoderParameters ep = new EncoderParameters();

                ep.Param[] = new EncoderParameter(Encoder.SaveFlag, (long)EncoderValue.MultiFrame);

                ep.Param[] = new EncoderParameter(Encoder.Compression, (long)EncoderValue.CompressionCCITT3);//压缩方式  CompressionCCITT3主要用于传真

                ImageCodecInfo info = GetEncoderInfo("image/tiff");

                for (nLoop = ; nLoop < nTotFrame; nLoop++)

                {

                    img.SelectActiveFrame(dimension, nLoop);

                    //保存 单tif页

                    string newfilePath = Path.Combine(tempDirectory, nLoop.ToString() + ".tif");

                    img.Save(newfilePath, info, ep);

                    //将路径存入 list中

                    list.Add(newfilePath);

                }

            }

            return list;

        }

        /// <summary>

        /// 获取支持的编码信息

        /// </summary>

        /// <param name="mimeType">协议描述</param>

        /// <returns>图像编码信息</returns>

        private static ImageCodecInfo GetEncoderInfo(string mimeType)

        {

            ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();

            for (int j = ; j < encoders.Length; j++)

            {

                if (encoders[j].MimeType == mimeType)

                    return encoders[j];

            }

            throw new Exception(mimeType + " mime type not found in ImageCodecInfo");

        }

    }

}