.NET 操作ZIP文件第三方库DotNetZip

来源：互联网发布：新东方英语网络教学编辑：程序博客网时间：2024/06/08 09:24
以前c#中一直用ICSharpCode来操作Zip文件，最近碰到一点问题，找到一个更加灵活、高效的第三方库DotNetZip。
官方地址： http://dotnetzip.codeplex.com/
Github入口： https://github.com/eropple/dotnetzip
同时提供一个简单的例子，例子中没有做异常处理（ps：只需要引入Ionic.Zip.dll即可）：
也可以参考这篇文章
using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;using Ionic.Zip;namespace DiagramToolkit.Utils {    /// <summary>    /// 压缩操作相关操作类，压缩格式为ZIP    /// </summary>    public class Compress {        /// <summary>        /// 压缩文件        /// </summary>        /// <param name="targetFileName">目标文件名</param>        /// <param name="sourceFileNames">源文件名</param>        /// <returns>压缩包压缩是否成功</returns>        public static bool ZipFile(string targetFileName, params string[] sourceFileNames) {            bool result = true;            try {                using (ZipFile zip = new ZipFile(Encoding.Default)) {                    foreach (string filename in sourceFileNames) {                        ZipEntry e = zip.AddFile(filename, "");                    }                    zip.Save(targetFileName);                }            } catch (Exception) {                result = false;            }            return result;        }        /// <summary>        /// 压缩文件        /// </summary>        /// <param name="targetFileName">目标文件名</param>        /// <param name="sourceDirectory">源目录</param>        /// <returns>压缩包压缩是否成功</returns>        public static bool DoZipFile(string targetFileName, string sourceDirectory) {            bool result = true;            try {                string[] sourceFileNames = Directory.GetFiles(sourceDirectory);                using (ZipFile zip = new ZipFile(Encoding.Default)) {                    foreach (string filename in sourceFileNames) {                        ZipEntry e = zip.AddFile(filename, "");                    }                    zip.Save(targetFileName);                }            } catch (Exception) {                result = false;            }            return result;        }        /// <summary>        /// 解压zip文件        /// </summary>        /// <param name="targetDirectory">解压后目录</param>        /// <param name="zipFileName">压缩包文件名</param>        /// <returns>解压结果是否成功</returns>        public static bool UnZipFile(string targetDirectory, string zipFileName) {            bool result = true;            try {                using (ZipFile zip = new ZipFile(zipFileName)) {                    zip.ExtractAll(targetDirectory);                }            } catch (Exception) {                result = false;            }            return result;        }        /// <summary>        /// 更新压缩包内容        /// </summary>        /// <param name="zipFileName">压缩文件名</param>        /// <param name="sourceFileName">要更新的文件</param>        public static void UpdateFileToZip(string zipFileName, string sourceFileName) {            using (ZipFile zip = new ZipFile(zipFileName)) {                string fileName = GetFileNameFromFullName(sourceFileName);                if (zip.ContainsEntry(fileName)) {                    var stream = File.OpenRead(sourceFileName);                    var z = zip.UpdateEntry(fileName, stream);                    z.Comment = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");                }                zip.Save();            }        }        public static string ExtractSingleFile(string zipFileName, string fileName, string extractDirectoryPath="") {            string tempFileName = "";            if (string.IsNullOrEmpty(extractDirectoryPath)) {                string temp = Environment.GetEnvironmentVariable("TEMP");                DirectoryInfo info = new DirectoryInfo(temp);                var tempInfo = info.CreateSubdirectory(Guid.NewGuid().ToString());                extractDirectoryPath = tempInfo.FullName;            }            byte[] content = null;            //转换stream为byte[]              Func<Stream, byte[]> toByteArray = (stream) => {                byte[] bytes = new byte[stream.Length];                stream.Read(bytes, 0, bytes.Length);                // 设置当前流的位置为流的开始                   stream.Seek(0, SeekOrigin.Begin);                return bytes;            };            using (ZipFile zip = new ZipFile(zipFileName, Encoding.Default)) {                if (zip.ContainsEntry(fileName)) {                    var entries = zip.Entries.Where(u => u.FileName.Equals(fileName));                    if (entries == null || entries.Count() <= 0) {                        return "";                    }                    var entry = entries.First();                    //将文件解压到内存流                      using (var stream = new MemoryStream()) {                        entry.Extract(stream);                        stream.Seek(0, SeekOrigin.Begin);                        content = toByteArray(stream);                    }                }            }            //创建文件              tempFileName = Path.Combine(extractDirectoryPath, fileName);            File.WriteAllBytes(tempFileName, content);            return tempFileName;        }        /// <summary>        /// 通过路径全名获取文件名        /// </summary>        /// <param name="fullFileName">全路井名</param>        /// <returns>文件名</returns>        private static string GetFileNameFromFullName(string fullFileName) {            string fileName = fullFileName;            int index = fullFileName.LastIndexOf('\\');            if (index >= 0 && index < fullFileName.Length - 1) {                fileName = fullFileName.Substring(index + 1);            }            return fileName;        }    }}
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