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[0];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 == 1){File.Copy((string)imageFiles[0], outFile, true);return;}Encoder enc = Encoder.SaveFlag;EncoderParameters ep = new EncoderParameters(2);ep.Param[0] = new EncoderParameter(enc, (long)EncoderValue.MultiFrame);ep.Param[1] = new EncoderParameter(Encoder.Compression, (long)compressEncoder);Bitmap pages = null;int frame = 0;ImageCodecInfo info = GetEncoderInfo("image/tiff");foreach (string strImageFile in imageFiles){if (frame == 0){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[0] = new EncoderParameter(enc, (long)EncoderValue.FrameDimensionPage);Bitmap bm = (Bitmap)Image.FromFile(strImageFile);pages.SaveAdd(bm, ep);bm.Dispose();}if (frame == imageFiles.Count - 1){//flush and close.  ep.Param[0] = 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[0];System.Drawing.Imaging.FrameDimension dimension = new System.Drawing.Imaging.FrameDimension(guid);int nTotFrame = img.GetFrameCount(dimension); //tif总页数  int nLoop = 0; //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(2);ep.Param[0] = new EncoderParameter(Encoder.SaveFlag, (long)EncoderValue.MultiFrame);ep.Param[1] = 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 = 0; 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 = 0; j < encoders.Length; j++){if (encoders[j].MimeType == mimeType)return encoders[j];}throw new Exception(mimeType + " mime type not found in ImageCodecInfo");}}
}