c# 动态操作 zip\rar 文件，压缩解压组件使用

using System;
using System.IO;
using Ionic.Zip;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Linq;

namespace TestIonicZip
{
[TestClass]
public class TestZip
{
/// <summary>
/// 创建一个 zip
/// </summary>
[TestMethod]
public void CreateZip()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

using (ZipFile zip = new ZipFile())
{
String[] filenames = System.IO.Directory.GetFiles(imgDir);

foreach (String filename in filenames)
{
ZipEntry e = zip.AddFile(filename,"");
e.Comment = "Added by Cheeso's CreateZip utility.";
}

zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
System.Net.Dns.GetHostName());

zip.Save(zipPath);
}
}
/// <summary>
/// 向 zip 中附加文件
/// </summary>
[TestMethod]
public void AppendToZip()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
var zipFix = Path.Combine(baseDir,"20151202194926.zip");

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

using (ZipFile zip = new ZipFile(zipFix))
{
String[] filenames = System.IO.Directory.GetFiles(imgDir);

foreach (String filename in filenames)
{
ZipEntry e = zip.AddFile(filename, "aa");
e.Comment = "Added by Cheeso's CreateZip utility.";
}

zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
System.Net.Dns.GetHostName());

zip.Save();
}
}
/// <summary>
/// 更新 zip 中指定文件
/// </summary>
[TestMethod]
public void UpdateZip()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
var zipFix = Path.Combine(baseDir, "20151202194926.zip");

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

var bCount = 0;
var aCount = 0;
using (ZipFile zip = new ZipFile(zipFix))
{
// note: this does not recurse directories!
String[] filenames = System.IO.Directory.GetFiles(imgDir);

bCount = zip.Count;
//删除一个文件
var fileName = "003.jpg";
var sourceFile = Path.Combine(imgDir, "004.jpg");
if (zip.ContainsEntry(fileName))
{
var stream = File.OpenRead(sourceFile);
var z = zip.UpdateEntry(fileName, stream);
z.Comment = DateTime.Now.ToString();
}
zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
System.Net.Dns.GetHostName());

zip.Save();

aCount = zip.Count;
}
}
/// <summary>
/// 删除 zip 中指定文件
/// </summary>
[TestMethod]
public void DeleteFromZip()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
var zipFix = Path.Combine(baseDir, "20151202194926.zip");

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

var bCount = 0;
var aCount = 0;
using (ZipFile zip = new ZipFile(zipFix))
{
// note: this does not recurse directories!
String[] filenames = System.IO.Directory.GetFiles(imgDir);

bCount = zip.Count;
//删除一个文件
if(zip.ContainsEntry("002.jpg"))
zip.RemoveEntry("002.jpg");
//删除一个文件，目录
var removeFile = "/aa/002.jpg";
if (zip.ContainsEntry(removeFile))
zip.RemoveEntry(removeFile);

zip.Comment = String.Format("This zip archive was created by the CreateZip example application on machine '{0}'",
System.Net.Dns.GetHostName());

zip.Save();

aCount = zip.Count;
}
Assert.IsTrue(bCount-1==aCount);
}

/// <summary>
/// 解压缩 zip
/// </summary>
[TestMethod]
public void ExtractZip()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
var zipFix = Path.Combine(baseDir, "20151202194926.zip");

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

var bCount = 0;
var aCount = 0;

using (ZipFile zip = new ZipFile(zipFix))
{
var dir = Path.Combine(baseDir, "Extract");
zip.ExtractAll(dir);
}
}

/// <summary>
/// 提取一个 文件
/// </summary>
[TestMethod]
public void ExtractZipByName()
{
var baseDir = Path.GetFullPath(@"..\..\zips");
var zipPath = Path.Combine(baseDir,
string.Format("{0}.zip", DateTime.Now.ToString("yyyyMMddHHmmss")));
var zipFix = Path.Combine(baseDir, "20151202194926.zip");

var imgDir = Path.GetFullPath(@"..\..\img");
var files = Directory.GetFiles(imgDir);

var bCount = 0;
var aCount = 0;
byte[] content = null;
//转换stream为byte[]
Func<Stream, byte[]> toByteArray = (stream) =>
{
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, bytes.Length);
// 设置当前流的位置为流的开始
stream.Seek(0, SeekOrigin.Begin);
return bytes;
};
var fileName = "004.jpg";
using (ZipFile zip = new ZipFile(zipFix))
{
if (zip.ContainsEntry(fileName))
{
//在跟目录找
var entrys = zip.SelectEntries(fileName,"");
var entry = entrys.FirstOrDefault();
//将文件解压到内存流
using (var stream = new MemoryStream())
{
entry.Extract(stream);
stream.Seek(0, SeekOrigin.Begin);
content = toByteArray(stream);
}

//在aa目录找
var entrys1 = zip.SelectEntries(fileName, "aa");
var entry1 = entrys.FirstOrDefault();
}
}
//创建文件
var extractImg = Path.Combine(baseDir, fileName);
File.WriteAllBytes(extractImg, content);
Assert.IsTrue(File.Exists(extractImg));
}
}
}