下面给大家介绍c#使用icsharpcode.sharpziplib.dll进行文件的压缩与解压功能，具体代码如下所示：
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using system;using system.collections.generic;using system.linq;using system.text;using system.io;using icsharpcode.sharpziplib.zip;using icsharpcode.sharpziplib.checksums;using system.security.cryptography;namespace zip压缩与解压{ public class ziphelper { /// <summary> /// 压缩单个文件 /// </summary> /// <param name="filetozip">需压缩的文件名</param> /// <param name="zipfile">压缩后的文件名（文件名都是绝对路径）</param> /// <param name="level">压缩等级（0-9）</param> /// <param name="password">压缩密码（解压是需要的密码）</param> public static void zipfile(string filetozip, string zipfile, int level = 5, string password = "123") { if (!file.exists(filetozip)) throw new filenotfoundexception("压缩文件" + filetozip + "不存在"); using (filestream fs = file.openread(filetozip)) { fs.position = 0;//设置流的起始位置 byte[] buffer = new byte[(int)fs.length]; fs.read(buffer, 0, buffer.length);//读取的时候设置position，写入的时候不需要设置 fs.close(); using (filestream zfstram = file.create(zipfile)) { using (zipoutputstream zipstream = new zipoutputstream(zfstram)) { zipstream.password = md5(password);//设置属性的时候在putnextentry函数之前 zipstream.setlevel(level); string filename = filetozip.substring(filetozip.lastindexof('\\') + 1); zipentry entry = new zipentry(filename); zipstream.putnextentry(entry); zipstream.write(buffer, 0, buffer.length); } } } } /// <summary> /// 压缩多个文件目录 /// </summary> /// <param name="dirname">需要压缩的目录</param> /// <param name="zipfile">压缩后的文件名</param> /// <param name="level">压缩等级</param> /// <param name="password">密码</param> public static void zipdir(string dirname, string zipfile, int level = 5, string password = "123") { zipoutputstream zos = new zipoutputstream(file.create(zipfile)); zos.password = md5(password); zos.setlevel(level); addzipentry(dirname, zos, dirname); zos.finish(); zos.close(); } /// <summary> /// 往压缩文件里面添加entry /// </summary> /// <param name="pathstr">文件路径</param> /// <param name="zos">zipoutputstream</param> /// <param name="basedirname">基础目录</param> private static void addzipentry(string pathstr, zipoutputstream zos, string basedirname) { directoryinfo dir = new directoryinfo(pathstr); foreach (filesysteminfo item in dir.getfilesysteminfos()) { if ((item.attributes & fileattributes.directory) == fileattributes.directory)//如果是文件夹继续递归 { addzipentry(item.fullname, zos, basedirname); } else { fileinfo f_item = (fileinfo)item; using (filestream fs = f_item.openread()) { byte[] buffer = new byte[(int)fs.length]; fs.position = 0; fs.read(buffer, 0, buffer.length); fs.close(); zipentry z_entry = new zipentry(item.fullname.replace(basedirname, "")); zos.putnextentry(z_entry); zos.write(buffer, 0, buffer.length); } } } } /// <summary> /// 解压多个文件目录 /// </summary> /// <param name="zfile">压缩文件绝对路径</param> /// <param name="dirname">解压文件目录</param> /// <param name="password">密码</param> public static void unzip(string zfile, string dirname, string password) { if (!directory.exists(dirname)) directory.createdirectory(dirname); using (zipinputstream zis = new zipinputstream(file.openread(zfile))) { zis.password = md5(password); zipentry entry; while ((entry = zis.getnextentry()) != null) { var strarr = entry.name.split('\\');//这边判断压缩文件里面是否存在目录，存在的话先创建目录后继续解压 if (strarr.length > 2) directory.createdirectory(dirname + @"\" + strarr[1]); using (filestream dir_fs = file.create(dirname + entry.name)) { int size = 1024 * 2; byte[] buffer = new byte[size]; while (true) { size = zis.read(buffer, 0, buffer.length); if (size > 0) dir_fs.write(buffer, 0, size); else break; } } } } } private static string md5(string pwd) { var res = ""; md5 md = md5.create(); byte[] s = md.computehash(encoding.default.getbytes(pwd)); for (int i = 0; i < s.length; i++) res = res + s[i].tostring("x"); return res; } }} |
调用函数如下:
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static void main(string[] args) { var str = @"\学籍导入模板.xls"; //var arr=str.split('\\'); var filepath = @"d:\程序文件\vs2010学习\studyprogram\zip压缩与解压\file\学籍导入模板.xls"; //ziphelper.zipfile(filepath, @"d:\程序文件\vs2010学习\studyprogram\zip压缩与解压\file\test.zip", 6, "123"); var dirpath = @"d:\程序文件\vs2010学习\studyprogram\zip压缩与解压"; //ziphelper.zipdir(dirpath + @"\file", dirpath + @"\file.zip", 6, "huage"); ziphelper.unzip(dirpath + @"\file.zip", dirpath + @"\test", "huage"); console.readkey(); } |
效果图如下：
总结
以上所述是小编给大家介绍的c#使用icsharpcode.sharpziplib.dll进行文件的压缩与解压功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！
原文链接：https://www.cnblogs.com/huage-1234/archive/2017/12/27/8127479.html
