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C#文件压缩类[网上收集]

2012-12-19 16:52  sql_manage  阅读(318)  评论(0编辑  收藏  举报

1、在CharpDevlop上有个压缩的DLL,是免费开源的叫SharpZipLib。

下载之后解压用其net-20里面的DLL。

2.这里是网上收集的一个通用类

  

public class ZipHelper
    {
         /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="sourceFilePath"></param>
        /// <param name="destinationZipFilePath"></param>
        public static void CreateZip(string sourceFilePath, string destinationZipFilePath)
        {
            if (sourceFilePath[sourceFilePath.Length - 1] != System.IO.Path.DirectorySeparatorChar)
                sourceFilePath += System.IO.Path.DirectorySeparatorChar;
 
            ZipOutputStream zipStream = new ZipOutputStream(File.Create(destinationZipFilePath));
            zipStream.SetLevel(6);  // 压缩级别 0-9
            CreateZipFiles(sourceFilePath, zipStream, sourceFilePath);
 
            zipStream.Finish();
            zipStream.Close();
        }
 
        /// <summary>
        /// 递归压缩文件
        /// </summary>
        /// <param name="sourceFilePath">待压缩的文件或文件夹路径</param>
        /// <param name="zipStream">打包结果的zip文件路径(类似 D:\WorkSpace\a.zip),全路径包括文件名和.zip扩展名</param>
        /// <param name="staticFile"></param>
        private static void CreateZipFiles(string sourceFilePath, ZipOutputStream zipStream, string staticFile)
        {
            Crc32 crc = new Crc32();
            string[] filesArray = Directory.GetFileSystemEntries(sourceFilePath);
            foreach (string file in filesArray)
            {
                if (Directory.Exists(file))                     //如果当前是文件夹,递归
                {
                    CreateZipFiles(file, zipStream, staticFile);
                }
 
                else                                            //如果是文件,开始压缩
                {
                    FileStream fileStream = File.OpenRead(file);
 
                    byte[] buffer = new byte[fileStream.Length];
                    fileStream.Read(buffer, 0, buffer.Length);
                    string tempFile = file.Substring(staticFile.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempFile);
 
                    entry.DateTime = DateTime.Now;
                    entry.Size = fileStream.Length;
                    fileStream.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    zipStream.PutNextEntry(entry);
 
                    zipStream.Write(buffer, 0, buffer.Length);
                }
            }
        }
    }

3、调用方式

    ZipHelper.CreateZip(pathFile,@"d:\test.zip");