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我在做项目的时候需要将文件进行压缩和解压缩，于是就从http://www.icsharpcode.net下载了关于压缩和解压缩的源码，但是下载下来后，面对这么多的代码，一时不知如何下手。只好耐下心来，慢慢的研究，总算找到了门路。针对自己的需要改写了文件压缩和解压缩的两个类，分别为ZipClass和UnZipClass。其中碰到了不少困难，就决定写出来压缩和解压的程序后，一定把源码贴出来共享，让首次接触压缩和解压缩的朋友可以少走些弯路。下面就来解释如何在C#里用http://www.icsharpcode.net下载的SharpZipLib进行文件的压缩和解压缩。 首先需要在项目里引用SharpZipLib.dll。然后修改其中的关于压缩和解压缩的类。实现源码如下： /// <summary> /// 压缩文件 /// </summary> using System; using System.IO; using ICSharpCode.SharpZipLib.Checksums; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.GZip; namespace Compression { public class ZipClass { public void ZipFile(string FileToZip, string ZipedFile ,int CompressionLevel, int BlockSize) { //如果文件没有找到，则报错 if (! System.IO.File.Exists(FileToZip)) { throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd"); } System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip,System.IO.FileMode.Open , System.IO.FileAccess.Read); System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile); ZipOutputStream ZipStream = new ZipOutputStream(ZipFile); ZipEntry ZipEntry = new ZipEntry("ZippedFile"); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(CompressionLevel); byte[] buffer = new byte[BlockSize]; System.Int32 size =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,size); try { while (size < StreamToZip.Length) { int sizeRead =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,sizeRead); size += sizeRead; } } catch(System.Exception ex) { throw ex; } ZipStream.Finish(); ZipStream.Close(); StreamToZip.Close(); } public void ZipFileMain(string[] args) { string[] filenames = Directory.GetFiles(args[0]); Crc32 crc = new Crc32(); ZipOutputStream s = new ZipOutputStream(File.Create(args[1])); s.SetLevel(6); // 0 - store only to 9 - means best compression foreach (string file in filenames) { //打开压缩文件 FileStream fs = File.OpenRead(file); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ZipEntry entry = new ZipEntry(file); entry.DateTime = DateTime.Now; // set Size and the crc, because the information // about the size and crc should be stored in the header // if it is not set it is automatically written in the footer. // (in this case size == crc == -1 in the header) // Some ZIP programs have problems with zip files that don't store // the size and crc in the header. entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; s.PutNextEntry(entry); s.Write(buffer, 0, buffer.Length); } s.Finish(); s.Close(); } } } 现在再来看看解压文件类的源码 /// <summary> /// 解压文件 /// </summary> using System; using System.Text; using System.Collections; using System.IO; using System.Diagnostics; using System.Runtime.Serialization.Formatters.Binary; using System.Data; using ICSharpCode.SharpZipLib.BZip2; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.Zip.Compression; using ICSharpCode.SharpZipLib.Zip.Compression.Streams; using ICSharpCode.SharpZipLib.GZip; namespace DeCompression { public class UnZipClass { public void UnZip(string[] args) { ZipInputStream s = new ZipInputStream(File.OpenRead(args[0])); ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { string directoryName = Path.GetDirectoryName(args[1]); string fileName = Path.GetFileName(theEntry.Name); //生成解压目录 Directory.CreateDirectory(directoryName); if (fileName != String.Empty) { //解压文件到指定的目录 FileStream streamWriter = File.Create(args[1]+theEntry.Name); int size = 2048; byte[] data = new byte[2048]; while (true) { size = s.Read(data, 0, data.Length); if (size > 0) { streamWriter.Write(data, 0, size); } else { break; } } streamWriter.Close(); } } s.Close(); } } } 有了压缩和解压缩的类以后，就要在窗体里调用了。怎么？是新手，不会调用？Ok,接着往下看如何在窗体里调用。 首先在窗体里放置两个命令按钮（不要告诉我你不会放啊~），然后编写以下源码 /// <summary> /// 调用源码 /// </summary> private void button2_Click_1(object sender, System.EventArgs e) { string []FileProperties=new string[2]; FileProperties[0]="C:\\unzipped\\";//待压缩文件目录 FileProperties[1]="C:\\zip\\a.zip"; //压缩后的目标文件 ZipClass Zc=new ZipClass(); Zc.ZipFileMain(FileProperties); } private void button2_Click(object sender, System.EventArgs e) { string []FileProperties=new string[2]; FileProperties[0]="C:\\zip\\test.zip";//待解压的文件 FileProperties[1]="C:\\unzipped\\";//解压后放置的目标目录 UnZipClass UnZc=new UnZipClass(); UnZc.UnZip(FileProperties); } /// <summary> /// 压缩文件 /// </summary> using System; using System.IO; using ICSharpCode.SharpZipLib.Checksums; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.GZip; namespace Compression { public class ZipClass { public void ZipFile(string FileToZip, string ZipedFile ,int CompressionLevel, int BlockSize) { //如果文件没有找到，则报错 if (! System.IO.File.Exists(FileToZip)) { throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd"); } System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip,System.IO.FileMode.Open , System.IO.FileAccess.Read); System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile); ZipOutputStream ZipStream = new ZipOutputStream(ZipFile); ZipEntry ZipEntry = new ZipEntry("ZippedFile"); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(CompressionLevel); byte[] buffer = new byte[BlockSize]; System.Int32 size =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,size); try { while (size < StreamToZip.Length) { int sizeRead =StreamToZip.Read(buffer,0,buffer.Length); ZipStream.Write(buffer,0,sizeRead); size += sizeRead; } } catch(System.Exception ex) { throw ex; } ZipStream.Finish(); ZipStream.Close(); StreamToZip.Close(); } public void ZipFileMain(string[] args) { string[] filenames = Directory.GetFiles(args[0]); Crc32 crc = new Crc32(); ZipOutputStream s = new ZipOutputStream(File.Create(args[1])); s.SetLevel(6); // 0 - store only to 9 - means best compression foreach (string file in filenames) { //打开压缩文件 FileStream fs = File.OpenRead(file); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ZipEntry entry = new ZipEntry(file); entry.DateTime = DateTime.Now; // set Size and the crc, because the information // about the size and crc should be stored in the header // if it is not set it is automatically written in the footer. // (in this case size == crc == -1 in the header) // Some ZIP programs have problems with zip files that don't store // the size and crc in the header. entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; s.PutNextEntry(entry); s.Write(buffer, 0, buffer.Length); } s.Finish(); s.Close(); } } } 现在再来看看解压文件类的源码 /// <summary> /// 解压文件 /// </summary> using System; using System.Text; using System.Collections; using System.IO; using System.Diagnostics; using System.Runtime.Serialization.Formatters.Binary; using System.Data; using ICSharpCode.SharpZipLib.BZip2; using ICSharpCode.SharpZipLib.Zip; using ICSharpCode.SharpZipLib.Zip.Compression; using ICSharpCode.SharpZipLib.Zip.Compression.Streams; using ICSharpCode.SharpZipLib.GZip; namespace DeCompression { public class UnZipClass { public void UnZip(string[] args) { ZipInputStream s = new ZipInputStream(File.OpenRead(args[0])); ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { string directoryName = Path.GetDirectoryName(args[1]); string fileName = Path.GetFileName(theEntry.Name); //生成解压目录 Directory.CreateDirectory(directoryName); if (fileName != String.Empty) { //解压文件到指定的目录 FileStream streamWriter = File.Create(args[1]+theEntry.Name); int size = 2048; byte[] data = new byte[2048]; while (true) { size = s.Read(data, 0, data.Length); if (size > 0) { streamWriter.Write(data, 0, size); } else { break; } } streamWriter.Close(); } } s.Close(); } } } 有了压缩和解压缩的类以后，就要在窗体里调用了。怎么？是新手，不会调用？Ok,接着往下看如何在窗体里调用。 首先在窗体里放置两个命令按钮（不要告诉我你不会放啊~），然后编写以下源码 /// <summary> /// 调用源码 /// </summary> private void button2_Click_1(object sender, System.EventArgs e) { string []FileProperties=new string[2]; FileProperties[0]="C:\\unzipped\\";//待压缩文件目录 FileProperties[1]="C:\\zip\\a.zip"; //压缩后的目标文件 ZipClass Zc=new ZipClass(); Zc.ZipFileMain(FileProperties); } private void button2_Click(object sender, System.EventArgs e) { string []FileProperties=new string[2]; FileProperties[0]="C:\\zip\\test.zip";//待解压的文件 FileProperties[1]="C:\\unzipped\\";//解压后放置的目标目录 UnZipClass UnZc=new UnZipClass(); UnZc.UnZip(FileProperties); }
示例二：
/// <summary>
/// Zip 压缩文件 /// </summary> public class Zip { public Zip() { } #region 加压方法 /// <summary> /// 功能：压缩文件（暂时只压缩文件夹下一级目录中的文件，文件夹及其子级被忽略） /// </summary> /// <param name="dirPath">被压缩的文件夹夹路径</param> /// <param name="zipFilePath">生成压缩文件的路径，为空则默认与被压缩文件夹同一级目录，名称为：文件夹名+.zip</param> /// <param name="err">出错信息</param> /// <returns>是否压缩成功</returns> public static bool ZipFile(string dirPath, string zipFilePath, out string err) { err = ""; if (dirPath == string.Empty) { err = "要压缩的文件夹不能为空！"; return false; } if (!Directory.Exists(dirPath)) { err = "要压缩的文件夹不存在！"; return false; } //压缩文件名为空时使用文件夹名＋.zip if (zipFilePath == string.Empty) { if (dirPath.EndsWith("//")) { dirPath = dirPath.Substring(0, dirPath.Length - 1); } zipFilePath = dirPath + ".zip"; } try { string[] filenames = Directory.GetFiles(dirPath); using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath))) { s.SetLevel(9); byte[] buffer = new byte[4096]; foreach (string file in filenames) { ZipEntry entry = new ZipEntry(Path.GetFileName(file)); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } s.Finish(); s.Close(); } } catch (Exception ex) { err = ex.Message; return false; } return true; } #endregion #region 解压 /// <summary> /// 功能：解压zip格式的文件。 /// </summary> /// <param name="zipFilePath">压缩文件路径</param> /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param> /// <param name="err">出错信息</param> /// <returns>解压是否成功</returns> public static bool UnZipFile(string zipFilePath, string unZipDir, out string err) { err = ""; if (zipFilePath == string.Empty) { err = "压缩文件不能为空！"; return false; } if (!File.Exists(zipFilePath)) { err = "压缩文件不存在！"; return false; } //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹 if (unZipDir == string.Empty) unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath)); if (!unZipDir.EndsWith("//")) unZipDir += "//"; if (!Directory.Exists(unZipDir)) Directory.CreateDirectory(unZipDir); try { using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath))) { ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { string directoryName = Path.GetDirectoryName(theEntry.Name); string fileName = Path.GetFileName(theEntry.Name); if (directoryName.Length > 0) { Directory.CreateDirectory(unZipDir + directoryName); } if (!directoryName.EndsWith("//")) directoryName += "//"; if (fileName != String.Empty) { using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name)) { int size = 2048; byte[] data = new byte[2048]; while (true) { size = s.Read(data, 0, data.Length); if (size > 0) { streamWriter.Write(data, 0, size); } else { break; } } } } }//while } } catch (Exception ex) { err = ex.Message; return false; } return true; }//解压结束 #endregion ------------------------------------------------------------------------------------------------------------ C#自带源码：https://files.cnblogs.com/greatverve/Compress.rar
System.IO.Compression 命名空间
注意：此命名空间在 .NET Framework 2.0 版中是新增的。 System.IO.Compression 命名空间包含提供基本的流压缩和解压缩服务的类。 (downmoon原作) 类 说明 DeflateStream 提供用于使用 Deflate 算法压缩和解压缩流的方法和属性。 GZipStream 提供用于压缩和解压缩流的方法和属性。 枚举 说明 CompressionMode 指定是否压缩或解压缩基础流。 下面以 GZipStream 为例说明 注意：此类在 .NET Framework 2.0 版中是新增的。 提供用于压缩和解压缩流的方法和属性。 命名空间:System.IO.Compression 程序集:System（在 system.dll 中） 语法 Visual Basic（声明） Public Class GZipStream Inherits Stream Visual Basic（用法） Dim instance As GZipStream C# public class GZipStream : Stream C++ public ref class GZipStream : public Stream J# public class GZipStream extends Stream JScript 全部评论
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