Song.Extend/Compress.cs

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using System;
using System.Xml;
using System.IO;
using System.Collections;
using System.Text;
using System.Web;
using ICSharpCode.SharpZipLib;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.GZip;
using System.Collections.Generic;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;

namespace Song.Extend
{
    public class Compress
    {
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="strFileFolder"></param>
        /// <param name="strZip"></param>
        public static void ZipFile(string strFileFolder, string strZip)
        {
            if (strFileFolder[strFileFolder.Length - 1] != Path.DirectorySeparatorChar)
                strFileFolder += Path.DirectorySeparatorChar;
            ZipOutputStream s = new ZipOutputStream(System.IO.File.Create(strZip));
            s.SetLevel(6); // 0 - store only to 9 - means best compression
            zip(strFileFolder, strZip, s);
            s.Finish();
            s.Close();
        }
        private static void zip(string strFile, string StoreFile, ZipOutputStream s)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
                strFile += Path.DirectorySeparatorChar;
            Crc32 crc = new Crc32();
            string[] filenames = Directory.GetFileSystemEntries(strFile);
            foreach (string file in filenames)
            {
                //如果本目录内有正在被压缩的文件，跳过
                if (file == StoreFile) continue;
                if (Directory.Exists(file))
                {
                    zip(file, StoreFile, s);

                }
                else
                {
                    //打开压缩文件,开始压缩
                    FileStream fs = System.IO.File.OpenRead(file);
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    string tempfile = file.Substring(StoreFile.LastIndexOf("\\") + 1);
                    ZipEntry entry = new ZipEntry(tempfile);
                    entry.DateTime = DateTime.Now;
                    entry.Size = fs.Length;
                    fs.Close();
                    crc.Reset();
                    crc.Update(buffer);