C# 文件压缩下载

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我们开发的过程中，有时用户要求下载的时候把文件进行压缩，以压缩包的形式下载到本地，方便保存和分类，以下是文件压缩的一个方法，以供参考

（注：System.IO.Packaging 需要引用WindowsBase.dll，才可以用）

using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.IO.Packaging;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("开始压缩");            try            {                PackageFolder(@"E:\IMG", @"E:\压缩包.zip", false);            }            catch (Exception ex)            {                Console.WriteLine(ex.Message);            }            Console.WriteLine("压缩完成");        }        /// <summary>        /// 包含子文件夹一起压缩成压缩包文件        /// </summary>        /// <param name="folderName">要压缩的文件夹</param>        /// <param name="compressedFileName">压缩后存放路径</param>        /// <param name="overrideExisting">压缩文件存在是否覆盖</param>        /// <returns>是否压缩成功</returns>        /// <Author></Author>        public static Boolean PackageFolder(String folderName, String compressedFileName, Boolean overrideExisting)        {            if (folderName.EndsWith(@"\"))                folderName = folderName.Remove(folderName.Length - 1);            Boolean result = false;            if (!Directory.Exists(folderName))            {                return result;            }            if (!overrideExisting && File.Exists(compressedFileName))            {                return result;            }            try            {                using (Package package = Package.Open(compressedFileName, FileMode.Create))                {                                        var fileList = Directory.EnumerateFiles(folderName, "*", SearchOption.AllDirectories);                    foreach (String fileName in fileList)                    {                        //获取所有子文件的文件                        String pathInPackage;                        pathInPackage = Path.GetDirectoryName(fileName).Replace(folderName, String.Empty) + "/" + Path.GetFileName(fileName);                        Uri partUriDocument = PackUriHelper.CreatePartUri(new Uri(pathInPackage, UriKind.Relative));                        PackagePart packagePartDocument = package.CreatePart(partUriDocument, "", CompressionOption.Fast);                        using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read))                        {                            fileStream.CopyTo(packagePartDocument.GetStream());                        }                    }                }                result = true;            }            catch (Exception e)            {                throw new Exception("压缩文件夹错误： " + folderName, e);            }            return result;        }    }}

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