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   源码介绍

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此压缩包含有 C#的 开发实例以及 将文件 分卷压缩的类 源码文件

项目网址详见: http://dotnetzip.codeplex.com/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Ionic.Zip;
using System.IO;
namespace Common.ThirdPartyExtensions
{
    /// <summary>
    /// Zip压缩文件辅助类(封装Ionic.Zip)
    /// liuzhao
    /// 2012.4.11
    /// </summary>
    public static class ZipHelper
    {
        /// <summary>
        /// 压缩指定文件或目录
        /// </summary>
        /// <param name="fileOrDirectoryName">要进行压缩的文件或目录名称</param>
        /// <returns>生成的压缩文件名</returns>
        public static string Compress(string fileOrDirectoryName)
        {
            string zipPath = _GetZipPath(fileOrDirectoryName);
            Compress(fileOrDirectoryName, zipPath);
            return zipPath;
        }

        /// <summary>
        /// 压缩指定文件或目录
        /// </summary>
        /// <param name="fileOrDirectoryName">要进行压缩的文件或目录名称</param>
        /// <param name="zipPath">生成的压缩文件路径</param>
        public static void Compress(string fileOrDirectoryName, string zipPath)
        {
            using (ZipFile zip = new ZipFile(Encoding.GetEncoding("utf-8")))
            {
                zip.AddItem(fileOrDirectoryName, "");
                zip.Save(zipPath);
            }
        }

        /// <summary>
        /// 分卷压缩指定文件或目录
        /// </summary>
        /// <param name="fileOrDirectoryName">要进行压缩的文件或目录名称</param>
        /// <param name="segmentSize">分卷大小(MB)</param>
        public static void Compress(string fileOrDirectoryName, int segmentSize)
        {
            string zipPath = _GetZipPath(fileOrDirectoryName);
            Compress(fileOrDirectoryName, zipPath, ZipDataUnit.MB, segmentSize);
        }

        /// <summary>
        /// 分卷压缩指定文件或目录
        /// </summary>
        /// <param name="fileOrDirectoryName">要进行压缩的文件或目录名称</param>
        /// <param name="zipPath">生成的压缩文件路径</param>
        /// <param name="dataUnit">分卷数据单位</param>
        /// <param name="segmentSize">分卷大小</param>
        public static void Compress(string fileOrDirectoryName, string zipPath, ZipDataUnit dataUnit, int segmentSize)
        {
            using (ZipFile zip = new ZipFile(Encoding.GetEncoding("utf-8")))
            {
                zip.MaxOutputSegmentSize = (int)dataUnit * segmentSize;
                zip.AddItem(fileOrDirectoryName, "");
                zip.Save(zipPath);
            }
        }

        private static string _GetZipPath(string path)
        {
            string directory = Path.GetDirectoryName(path);
            if (string.IsNullOrWhiteSpace(directory)) directory = Path.GetPathRoot(path);
            string fileName = Path.GetFileName(path);
            string zipFileName = null;
            //文件路径
            if (!string.IsNullOrWhiteSpace(fileName))
            {
                zipFileName = Path.ChangeExtension(fileName, ".zip");
            }
            else
            {
                zipFileName = directory.Split('\\').Last();
                if (string.IsNullOrEmpty(zipFileName))
                {
                    zipFileName = "未命名";
                }
                else
                {
                    directory = directory.Replace(zipFileName, "");
                }
                zipFileName  = ".zip";
            }

            return Path.Combine(directory, zipFileName);
        }


    }
    /// <summary>
    /// 分卷数据单位
    /// </summary>
    public enum ZipDataUnit
    {
        /// <summary>
        /// 1024字节
        /// </summary>
        KB = 1024,

        /// <summary>
        /// 1024 * 1024字节
        /// </summary>
        MB = 1024 * 1024,

        /// <summary>
        /// 1024 * 1024 * 1024字节
        /// </summary>
        GB = 1024 * 1024 * 1024
    }

}