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

来源：互联网发布：ally mac tyana种子编辑：程序博客网时间：2024/05/17 06:23

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
}

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