压缩文件( ZipFile)
ZipFile类用于选择文件或文件夹进行压缩生成压缩包。
1.ZipFile常见属性:
Count:文件数目(在ComitUpdat);
Password:压缩包密码
Size:压缩包占用空间大小
Name:压缩包名称,默认输出是文件路径
ZipEntry:压缩包里的文件,通过索引[]访问
2.ZipFile常见方法:
Add:添加要进行压缩的文件
AddDirectory:添加文件夹(不会压缩文件夹里的文件);
Delete:删除文件或文件夹
BeginUpdate:开始修改压缩包
CommitUpdate:提交修改
SetComment:添加注释
3.实例代码
引用using ICSharpCode.SharpZipLib.Zip;
在程序包管理器控制台中Install-Package SharpZipLib
(1)选取要压缩的文件
button1:打开文件 按钮 listBox1:文本框 button2 :压缩按钮
List files=new List();
private void button1_Click_1(object sender, EventArgs e)
{
//打开文件夹
// FolderBrowserDialog
//用户打开文件
OpenFileDialog openFile = new OpenFileDialog();
//多选文件
openFile.Multiselect = true;
if (openFile.ShowDialog()==DialogResult.OK)
{
//FileNames获取所有选中的文件名
files.AddRange(openFile.FileNames);
foreach (var item in files)
{
listBox1.Items.Add(item);
}
}
}
(2)压缩选择的文件
//方法1
private void button2_Click(object sender, EventArgs e)
{
using (ZipFile zip = ZipFile.Create(@"..路径"))
{
zip.BeginUpdate();
MessageBox.Show(listBox1.Text.ToString());
zip.Add(listBox1.Text.ToString());//添加一个文件
zip.CommitUpdate();
}
}
//方法2
private void button2_Click(object sender, EventArgs e)
{
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.Filter = "zip文件(*.zip)|*.zip";
saveDialog.FileName = DateTime.Now.ToString("yyyyMMddHHmmss");
if (saveDialog.ShowDialog() == DialogResult.OK)
{
ZipHelper zip = new ZipHelper();
zip.ZipManyFilesOrDictorys(files, saveDialog.FileName, null);
}
}
(3)ZipHelper 是压缩通用类
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace 文件压缩
{
public class ZipHelper
{
///
/// 压缩文件夹
///
/// 需要压缩的文件夹
/// 压缩后的压缩文件名称
/// 压缩率0（无压缩）9（压缩率最高）
public void ZipDir(string dirToZip, string zipedFileName, int compressionLevel = 9)
{
if (Path.GetExtension(zipedFileName) != ".zip")
{
zipedFileName = zipedFileName + ".zip";
}
using (var zipoutputstream = new ZipOutputStream(File.Create(zipedFileName)))
{
zipoutputstream.SetLevel(compressionLevel);
Crc32 crc = new Crc32();
Hashtable fileList = GetAllFies(dirToZip);
foreach (DictionaryEntry item in fileList)
{
FileStream fs = new FileStream(item.Key.ToString(), FileMode.Open, FileAccess.Read,
FileShare.ReadWrite);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ZipEntry entry = new ZipEntry(Path.GetFileName(item.Key.ToString()))
{
DateTime = (DateTime) item.Value,
Size = fs.Length
};
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
zipoutputstream.PutNextEntry(entry);
zipoutputstream.Write(buffer, 0, buffer.Length);
}
}
}
///
/// 获取所有文件
///
///
/// 获取一个文件夹下的所有文件夹里的文件
///
///
///
public void GetAllDirsFiles(IEnumerable dirs, Hashtable filesList)
{
foreach (DirectoryInfo dir in dirs)
{
foreach (FileInfo file in dir.GetFiles("*.*"))
{
filesList.Add(file.FullName, file.LastWriteTime);
}
GetAllDirsFiles(dir.GetDirectories(), filesList);
}
}
///
/// 获取一个文件夹下的文件
///
/// 目录名称
/// 文件列表HastTable
public static void GetAllDirFiles(DirectoryInfo dir, Hashtable filesList)
{
foreach (FileInfo file in dir.GetFiles("*.*"))
{
filesList.Add(file.FullName, file.LastWriteTime);
}
}
///
/// 功能：解压zip格式的文件。
///
/// 压缩文件路径
/// 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
/// 解压是否成功
public void UnZip(string zipFilePath, string unZipDir)
{
if (zipFilePath == string.Empty)
{
throw new Exception("压缩文件不能为空！");
}
if (!File.Exists(zipFilePath))
{
throw new FileNotFoundException("压缩文件不存在！");
}
//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);
using (var 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 (!string.IsNullOrEmpty(directoryName))
{
Directory.CreateDirectory(unZipDir + directoryName);
}
if (directoryName != null && !directoryName.EndsWith("/"))
{
}
if (fileName != String.Empty)
{
using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
{
int size;
byte[] data = new byte[2048];
while (true)
{
size = s.Read(data, 0, data.Length);
if (size > 0)
{
streamWriter.Write(data, 0, size);
}
else
{
break;
}
}
}
}
}
}
}
///
/// 压缩单个文件
///
/// 被压缩的文件名称(包含文件路径)，文件的全路径
/// 压缩后的文件名称(包含文件路径)，保存的文件名称
/// 压缩率0（无压缩）到 9（压缩率最高）
public void ZipFile(string filePath, string zipedFileName, int compressionLevel = 9)
{
// 如果文件没有找到，则报错
if (!File.Exists(filePath))
{
throw new FileNotFoundException("文件：" + filePath + "没有找到！");
}
// 如果压缩后名字为空就默认使用源文件名称作为压缩文件名称
if (string.IsNullOrEmpty(zipedFileName))
{
string oldValue = Path.GetFileName(filePath);
if (oldValue != null)
{
zipedFileName = filePath.Replace(oldValue, "") + Path.GetFileNameWithoutExtension(filePath) +
".zip";
}
}
// 如果压缩后的文件名称后缀名不是zip，就是加上zip，防止是一个乱码文件
if (Path.GetExtension(zipedFileName) != ".zip")
{
zipedFileName = zipedFileName + ".zip";
}
// 如果指定位置目录不存在，创建该目录 C:\Users\yhl\Desktop\大汉三通
string zipedDir = zipedFileName.Substring(0, zipedFileName.LastIndexOf("\\", StringComparison.Ordinal));
if (!Directory.Exists(zipedDir))
{
Directory.CreateDirectory(zipedDir);
}
// 被压缩文件名称
string filename = filePath.Substring(filePath.LastIndexOf("\\", StringComparison.Ordinal) + 1);
var streamToZip = new FileStream(filePath, FileMode.Open, FileAccess.Read);
var zipFile = File.Create(zipedFileName);
var zipStream = new ZipOutputStream(zipFile);
var zipEntry = new ZipEntry(filename);
zipStream.PutNextEntry(zipEntry);
zipStream.SetLevel(compressionLevel);
var buffer = new byte[2048];
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;
}
}
finally
{
zipStream.Finish();
zipStream.Close();
streamToZip.Close();
}
}
///
/// 压缩单个文件
///
/// 要进行压缩的文件名，全路径
/// 压缩后生成的压缩文件名,全路径
public void ZipFile(string fileToZip, string zipedFile)
{
// 如果文件没有找到，则报错
if (!File.Exists(fileToZip))
{
throw new FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
}
using (FileStream fileStream = File.OpenRead(fileToZip))
{
byte[] buffer = new byte[fileStream.Length];
fileStream.Read(buffer, 0, buffer.Length);
fileStream.Close();
using (FileStream zipFile = File.Create(zipedFile))
{
using (ZipOutputStream zipOutputStream = new ZipOutputStream(zipFile))
{
// string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);
string fileName = Path.GetFileName(fileToZip);
var zipEntry = new ZipEntry(fileName)
{
DateTime = DateTime.Now,
IsUnicodeText = true
};
zipOutputStream.PutNextEntry(zipEntry);
zipOutputStream.SetLevel(5);
zipOutputStream.Write(buffer, 0, buffer.Length);
zipOutputStream.Finish();
zipOutputStream.Close();
}
}
}
}
///
/// 压缩多个目录或文件
///
/// 待压缩的文件夹或者文件，全路径格式,是一个集合
/// 压缩后的文件名，全路径格式
/// 压宿密码
/// folderOrFileList, string zipedFile, string password)
{
bool res = true;
using (var s = new ZipOutputStream(File.Create(zipedFile)))
{
s.SetLevel(6);
if (!string.IsNullOrEmpty(password))
{
s.Password = password;
}
foreach (string fileOrDir in folderOrFileList)
{
//是文件夹
if (Directory.Exists(fileOrDir))
{
res = ZipFileDictory(fileOrDir, s, "");
}
else
{
//文件
res = ZipFileWithStream(fileOrDir, s);
}
}
s.Finish();
s.Close();
return res;
}
}
///
/// 带压缩流压缩单个文件
///
/// 要进行压缩的文件名
///
///
/// 递归压缩文件夹方法
///
///
///
///
private bool ZipFileDictory(string folderToZip, ZipOutputStream s, string parentFolderName)
{
bool res = true;
ZipEntry entry = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
//创建当前文件夹
entry = new ZipEntry(Path.Combine(parentFolderName,
Path.GetFileName(folderToZip) + "/")); //加上 “/” 才会当成是文件夹创建
s.PutNextEntry(entry);
s.Flush();
//先压缩文件，再递归压缩文件夹
var filenames = Directory.GetFiles(folderToZip);
foreach (string file in filenames)
{
//打开压缩文件
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
entry = new ZipEntry(Path.Combine(parentFolderName,
Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
catch
{
res = false;
}
finally
{
if (fs != null)
{
fs.Close();
}
if (entry != null)
{
}
GC.Collect();
GC.Collect(1);
}
var folders = Directory.GetDirectories(folderToZip);
foreach (string folder in folders)
{
if(!ZipFileDictory(folder,s,Path.Combine(parentFolderName,Path.GetFileName(folderToZip))))
{
return false;
}
}
return res;
}
}