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C#使用ICSharpCode.SharpZipLib.dll进行文件的压缩与解压功能

2017-12-28 10:12 1151 查看

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：

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:

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脚本之家网站的支持！

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