C#利用SharpZipLib生成压缩包
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什么是SharpZipLib ? SharpZipLib是一个开源的C#压缩解压库,应用非常广泛。就像用http://ADO.NET操作数据库要打开连接、执行命令、关闭连接等多个步骤一样,用SharpZipLib进行压缩和解压也需要多个步骤。 SharpZipLib功能比较强大,在很多C#的应用中,都有它的身影,我们可以通过引入SharpZipLib类库文件,在程序中实现自动压缩文件以及解压缩文件的功能,例如一个常见的情景就是用户客户端程序下载更新包,下载完成之后,在本地自动解压文件。 在工程中引用SharpZipLib 在项目中,点击项目名称右键-->管理NuGet程序包,打开NuGet包管理器窗口,进行搜索下载即可,如下图所示: SharpZipLib的关键类结构图 如下所示: 涉及知识点:
示例效果图: 关于解压缩小例子的示例效果图,如下: 核心代码using ICSharpCode.SharpZipLib.Checksum; using ICSharpCode.SharpZipLib.Zip; using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks;
namespace DemoZip { class ZipHelper { private string rootPath = string.Empty;
#region 压缩
/// <summary> /// 递归压缩文件夹的内部方法 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipStream">压缩输出流</param> /// <param name="parentFolderName">此文件夹的上级文件夹</param> /// <returns></returns> private bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName) { bool result = true; string[] folders, files; ZipEntry ent = null; FileStream fs = null; Crc32 crc = new Crc32();
try { string entName = folderToZip.Replace(this.rootPath, string.Empty)+"/"; //Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/") ent = new ZipEntry(entName); zipStream.PutNextEntry(ent); zipStream.Flush();
files = Directory.GetFiles(folderToZip); foreach (string file in files) { fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); ent = new ZipEntry(entName + Path.GetFileName(file)); ent.DateTime = DateTime.Now; ent.Size = fs.Length;
fs.Close();
crc.Reset(); crc.Update(buffer);
ent.Crc = crc.Value; zipStream.PutNextEntry(ent); zipStream.Write(buffer, 0, buffer.Length); }
} catch { result = false; } finally { if (fs != null) { fs.Close(); fs.Dispose(); } if (ent != null) { ent = null; } GC.Collect(); GC.Collect(1); }
folders = Directory.GetDirectories(folderToZip); foreach (string folder in folders) if (!ZipDirectory(folder, zipStream, folderToZip)) return false;
return result; }
/// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <param name="password">密码</param> /// <returns>是否压缩成功</returns> public bool ZipDirectory(string folderToZip, string zipedFile, string password) { bool result = false; if (!Directory.Exists(folderToZip)) return result;
ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile)); zipStream.SetLevel(6); if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
result = ZipDirectory(folderToZip, zipStream, "");
zipStream.Finish(); zipStream.Close();
return result; }
/// <summary> /// 压缩文件夹 /// </summary> /// <param name="folderToZip">要压缩的文件夹路径</param> /// <param name="zipedFile">压缩文件完整路径</param> /// <returns>是否压缩成功</returns> public bool ZipDirectory(string folderToZip, string zipedFile) { bool result = ZipDirectory(folderToZip, zipedFile, null); return result; }
/// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public bool ZipFile(string fileToZip, string zipedFile, string password) { bool result = true; ZipOutputStream zipStream = null; FileStream fs = null; ZipEntry ent = null;
if (!File.Exists(fileToZip)) return false;
try { fs = File.OpenRead(fileToZip); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); fs.Close();
fs = File.Create(zipedFile); zipStream = new ZipOutputStream(fs); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; ent = new ZipEntry(Path.GetFileName(fileToZip)); zipStream.PutNextEntry(ent); zipStream.SetLevel(6);
zipStream.Write(buffer, 0, buffer.Length);
} catch { result = false; } finally { if (zipStream != null) { zipStream.Finish(); zipStream.Close(); } if (ent != null) { ent = null; } if (fs != null) { fs.Close(); fs.Dispose(); } } GC.Collect(); GC.Collect(1);
return result; }
/// <summary> /// 压缩文件 /// </summary> /// <param name="fileToZip">要压缩的文件全名</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public bool ZipFile(string fileToZip, string zipedFile) { bool result = ZipFile(fileToZip, zipedFile, null); return result; }
/// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <param name="password">密码</param> /// <returns>压缩结果</returns> public bool Zip(string fileToZip, string zipedFile, string password) { bool result = false; if (Directory.Exists(fileToZip)) { this.rootPath = Path.GetDirectoryName(fileToZip); result = ZipDirectory(fileToZip, zipedFile, password); } else if (File.Exists(fileToZip)) { this.rootPath = Path.GetDirectoryName(fileToZip); result = ZipFile(fileToZip, zipedFile, password); } return result; }
/// <summary> /// 压缩文件或文件夹 /// </summary> /// <param name="fileToZip">要压缩的路径</param> /// <param name="zipedFile">压缩后的文件名</param> /// <returns>压缩结果</returns> public bool Zip(string fileToZip, string zipedFile) { bool result = Zip(fileToZip, zipedFile, null); return result;
}
#endregion
#region 解压
/// <summary> /// 解压功能(解压压缩文件到指定目录) /// </summary> /// <param name="fileToUnZip">待解压的文件</param> /// <param name="zipedFolder">指定解压目标目录</param> /// <param name="password">密码</param> /// <returns>解压结果</returns> public bool UnZip(string fileToUnZip, string zipedFolder, string password) { bool result = true; FileStream fs = null; ZipInputStream zipStream = null; ZipEntry ent = null; string fileName;
if (!File.Exists(fileToUnZip)) return false;
if (!Directory.Exists(zipedFolder)) Directory.CreateDirectory(zipedFolder);
try { zipStream = new ZipInputStream(File.OpenRead(fileToUnZip)); if (!string.IsNullOrEmpty(password)) zipStream.Password = password; while ((ent = zipStream.GetNextEntry()) != null) { if (!string.IsNullOrEmpty(ent.Name)) { fileName = Path.Combine(zipedFolder, ent.Name); fileName = fileName.Replace('/', '\\');//change by Mr.HopeGi
if (fileName.EndsWith("\\")) { Directory.CreateDirectory(fileName); continue; }
fs = File.Create(fileName); int size = 2048; byte[] data = new byte[size]; while (true) { size = zipStream.Read(data, 0, data.Length); if (size > 0) fs.Write(data, 0, data.Length); else break; } } } } catch { result = false; } finally { if (fs != null) { fs.Close(); fs.Dispose(); } if (zipStream != null) { zipStream.Close(); zipStream.Dispose(); } if (ent != null) { ent = null; } GC.Collect(); GC.Collect(1); } return result; }
/// <summary> /// 解压功能(解压压缩文件到指定目录) /// </summary> /// <param name="fileToUnZip">待解压的文件</param> /// <param name="zipedFolder">指定解压目标目录</param> /// <returns>解压结果</returns> public bool UnZip(string fileToUnZip, string zipedFolder) { bool result = UnZip(fileToUnZip, zipedFolder, null); return result; }
#endregion } 备注 关于生成压缩的方法还有很多,如通过命令行调用winrar的执行文件,SharpZipLib只是方法之一。 关于SharpZipLib的的API文档,可参看链接:https://www.nuget.org/packages/SharpZipLib/。 该文章在 2023/12/31 16:57:27 编辑过 |
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