C#+ICSharpCode.SharpZipLib.dll实现压缩解压缩功能

注意事项：需要下载最新版本的dll。现在用的是86版本的dll

public class ZipClass

{

public static int avg = 1024 * 1024 * 100;//100MB写一次

#region 压缩文件 和 文件夹

/// <summary>

/// 压缩文件 和 文件夹

/// </summary>

/// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param>

/// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param>

/// <returns>压缩是否成功</returns>

public static bool Zip(string FileToZip, string ZipedFile)

{

return Zip(FileToZip, ZipedFile, "");

}

/// <summary>

/// 压缩文件 和 文件夹，不压缩顶级目录

/// </summary>

/// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>

/// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param>

/// <returns>压缩是否成功</returns>

public static bool ZipNo(string FolderToZip, string ZipedFile)

{

if (!Directory.Exists(FolderToZip))

return false;

if (ZipedFile == string.Empty)

{

//如果为空则文件名为待压缩的文件名加上.rar

ZipedFile = FolderToZip + ".zip";

}

ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));

s.SetLevel(6);

string[] filenames = Directory.GetFiles(FolderToZip);

ZipEntry entry = null;

FileStream fs = null;

Crc32 crc = new Crc32();

foreach (string file in filenames)

{

//压缩文件

fs = File.OpenRead(file);

byte[] buffer = new byte[avg];

entry = new ZipEntry(Path.GetFileName(file));

entry.DateTime = DateTime.Now;

entry.Size = fs.Length;

s.PutNextEntry(entry);

for (int i = 0; i < fs.Length; i += avg)

{

if (i + avg > fs.Length)

{

//不足100MB的部分写剩余部分

buffer = new byte[fs.Length - i];

}

fs.Read(buffer, 0, buffer.Length);

s.Write(buffer, 0, buffer.Length);

}

}

if (fs != null)

{

fs.Close();

fs = null;

}

if (entry != null)

entry = null;

GC.Collect();

GC.Collect(1);

//压缩目录

string[] folders = Directory.GetDirectories(FolderToZip);

foreach (string folder in folders)

{

if (!ZipFileDictory(folder, s, "")) ;

}

s.Finish();

s.Close();

return true;

}

/// <summary>

/// 压缩文件 和 文件夹

/// </summary>

/// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param>

/// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param>

/// <param name="Password">压缩密码</param>

/// <returns>压缩是否成功</returns>

public static bool Zip(string FileToZip, string ZipedFile, string Password)

{

if (Directory.Exists(FileToZip))

{

return ZipFileDictory(FileToZip, ZipedFile, Password);

}

else if (File.Exists(FileToZip))

{

return ZipFile(FileToZip, ZipedFile, Password);

}

else

{

return false;

}

}

#endregion

#region 解压

/// <summary>

/// 功能：解压zip格式的文件。

/// </summary>

/// <param name="zipFilePath">压缩文件路径，全路径格式</param>

/// <param name="unZipDir">解压文件存放路径,全路径格式，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</param>

/// <param name="err">出错信息</param>

/// <returns>解压是否成功</returns>

public static bool UnZip(string zipFilePath, string unZipDir)

{

if (zipFilePath == string.Empty)

{

throw new System.IO.FileNotFoundException("压缩文件不不能为空！");

}

if (!File.Exists(zipFilePath))

{

throw new System.IO.FileNotFoundException("压缩文件: " + zipFilePath + " 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), "");

if (!unZipDir.EndsWith("//"))

unZipDir += "//";

if (!Directory.Exists(unZipDir))

Directory.CreateDirectory(unZipDir);

try

{

using (ZipInputStream 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 (directoryName.Length > 0)

{

Directory.CreateDirectory(unZipDir + directoryName);

}

if (!directoryName.EndsWith("//"))

directoryName += "//";

if (fileName != String.Empty)

{

using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))

{

int size = 2048;

byte[] data = new byte[2048];

while (true)

{

size = s.Read(data, 0, data.Length);

if (size > 0)

{

streamWriter.Write(data, 0, size);

}

else

{

break;

}

}

}

}

}//while

}

}

catch (Exception ex)

{

throw new Exception(ex.Message);

}

return true;

}//解压结束

#endregion

#region 压缩目录

/// <summary>

/// 压缩目录

/// </summary>

/// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>

/// <param name="ZipedFile">压缩后的文件名，全路径格式，如果为空则文件名为待压缩的文件名加上.rar</param>

/// <returns></returns>

private static bool ZipFileDictory(string FolderToZip, string ZipedFile, string Password)

{

bool res;

if (!Directory.Exists(FolderToZip))

return false;

if (ZipedFile == string.Empty)

{

//如果为空则文件名为待压缩的文件名加上.rar

ZipedFile = FolderToZip + ".zip";

}

ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));

s.SetLevel(6);

if (!string.IsNullOrEmpty(Password.Trim()))

s.Password = Password.Trim();

res = ZipFileDictory(FolderToZip, s, "");

s.Finish();

s.Close();

return res;

}

#endregion

#region 压缩文件

/// <summary>

/// 压缩文件

/// </summary>

/// <param name="FileToZip">要进行压缩的文件名</param>

/// <param name="ZipedFile">压缩后生成的压缩文件名，如果为空则文件名为待压缩的文件名加上.rar</param>

/// <returns>压缩是否成功</returns>

private static bool ZipFile(string FileToZip, string ZipedFile, string Password)

{

//如果文件没有找到，则报错

if (!File.Exists(FileToZip))

throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");

if (ZipedFile == string.Empty)

{

//如果为空则文件名为待压缩的文件名加上.rar

ZipedFile = FileToZip + ".zip";

}

FileStream ZipFile = null;

ZipOutputStream ZipStream = null;

ZipEntry ZipEntry = null;

bool res = true;

ZipFile = File.Create(ZipedFile);

ZipStream = new ZipOutputStream(ZipFile);

ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));

ZipStream.PutNextEntry(ZipEntry);

ZipStream.SetLevel(6);

if (!string.IsNullOrEmpty(Password.Trim()))

ZipStream.Password = Password.Trim();

try

{

ZipFile = File.OpenRead(FileToZip);

byte[] buffer = new byte[avg];

for (int i = 0; i < ZipFile.Length; i += avg)

{

if (i + avg > ZipFile.Length)

{

//不足100MB的部分写剩余部分

buffer = new byte[ZipFile.Length - i];

}

ZipFile.Read(buffer, 0, buffer.Length);

ZipStream.Write(buffer, 0, buffer.Length);

}

}

catch (Exception ex)

{

res = false;

}

finally

{

if (ZipEntry != null)

{

ZipEntry = null;

}

if (ZipStream != null)

{

ZipStream.Finish();

ZipStream.Close();

}

if (ZipFile != null)

{

ZipFile.Close();

ZipFile = null;

}

GC.Collect();

GC.Collect(1);

}

return res;

}

#endregion

#region 递归压缩文件夹方法

/// <summary>

/// 递归压缩文件夹方法

/// </summary>

/// <param name="FolderToZip"></param>

/// <param name="s"></param>

/// <param name="ParentFolderName"></param>

private static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)

{

bool res = true;

string[] folders, filenames;

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

filenames = Directory.GetFiles(FolderToZip);

foreach (string file in filenames)

{

//打开压缩文件

fs = File.OpenRead(file);

byte[] buffer = new byte[avg];

entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));

entry.DateTime = DateTime.Now;

entry.Size = fs.Length;

s.PutNextEntry(entry);

for (int i = 0; i < fs.Length; i += avg)

{

if (i + avg > fs.Length)

{

//不足100MB的部分写剩余部分

buffer = new byte[fs.Length - i];

}

fs.Read(buffer, 0, buffer.Length);

s.Write(buffer, 0, buffer.Length);

}

}

}

catch (Exception ex)

{

res = false;

}

finally

{

if (fs != null)

{

fs.Close();

fs = null;

}

if (entry != null)

entry = null;

GC.Collect();

GC.Collect(1);

}

folders = Directory.GetDirectories(FolderToZip);

foreach (string folder in folders)

{

if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))

return false;

}

return res;

}

#endregion

}