压缩解压缩

压缩 zip

public class ZipClass
{
/// <summary>
/// ZIP：压缩文件夹
/// add yuangang by 2016-06-13
/// </summary>
/// <param name="DirectoryToZip">需要压缩的文件夹（绝对路径）</param>
/// <param name="ZipedPath">压缩后的文件路径（绝对路径）</param>
/// <param name="ZipedFileName">压缩后的文件名称（文件名，默认 同源文件夹同名）</param>
/// <param name="IsEncrypt">是否加密（默认 加密）</param>
public static void ZipDirectory(string DirectoryToZip, string ZipedPath, string ZipedFileName = "", bool IsEncrypt = false)
{
//如果目录不存在，则报错
if (!System.IO.Directory.Exists(DirectoryToZip))
{
throw new System.IO.FileNotFoundException("指定的目录: " + DirectoryToZip + " 不存在!");
}

//文件名称（默认同源文件名称相同）
string ZipFileName = string.IsNullOrEmpty(ZipedFileName) ? ZipedPath + "\" + new DirectoryInfo(DirectoryToZip).Name + ".zip" : ZipedPath + "\" + ZipedFileName + ".zip";

using (System.IO.FileStream ZipFile = System.IO.File.Create(ZipFileName))
{
using (ZipOutputStream s = new ZipOutputStream(ZipFile))
{
if (IsEncrypt)
{
//压缩文件加密
s.Password = "123";
}
ZipSetp(DirectoryToZip, s, "");
}
}
}
/// <summary>
/// 递归遍历目录
/// add yuangang by 2016-06-13
/// </summary>
private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
{
if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
{
strDirectory += Path.DirectorySeparatorChar;
}
Crc32 crc = new Crc32();

string[] filenames = Directory.GetFileSystemEntries(strDirectory);

foreach (string file in filenames)// 遍历所有的文件和目录
{

if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
{
string pPath = parentPath;
pPath += file.Substring(file.LastIndexOf("\") + 1);
pPath += "\";
ZipSetp(file, s, pPath);
}

else // 否则直接压缩文件
{
//打开压缩文件
using (FileStream fs = File.OpenRead(file))
{

byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);

string fileName = parentPath + file.Substring(file.LastIndexOf("\") + 1);
ZipEntry entry = new ZipEntry(fileName);

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);
}
}
}
}
}

解压zip

#region 解压zip文件
/// <summary>
/// 解压zip文件
/// </summary>
/// <returns></returns>
public static bool jyfile(string _depositPath, string _floderPath)
{

if (!Directory.Exists(_floderPath))
{
Directory.CreateDirectory(_floderPath);
}
if (!File.Exists(_depositPath))
{
return false;
}
//string[] FileProperties = new string[2];
//FileProperties[0] = _depositPath;// "C:\zip\test.zip";//待解压的文件
//FileProperties[1] = _floderPath;// "C:\unzipped\";//解压后放置的目标目录

bool r = ZipClass.UnZip(_depositPath, _floderPath,"");

// bool r= ZipClass.DeCompressionZip(_depositPath, _floderPath);
return r;
}
#endregion

/// <summary>
/// ZIP:解压一个zip文件
/// add yuangang by 2016-06-13
/// </summary>
/// <param name="ZipFile">需要解压的Zip文件（绝对路径）</param>
/// <param name="TargetDirectory">解压到的目录</param>
/// <param name="Password">解压密码</param>
/// <param name="OverWrite">是否覆盖已存在的文件</param>
public static bool UnZip(string ZipFile, string TargetDirectory, string Password, bool OverWrite = true)
{
try
{
//如果解压到的目录不存在，则报错
if (!System.IO.Directory.Exists(TargetDirectory))
{
throw new System.IO.FileNotFoundException("指定的目录: " + TargetDirectory + " 不存在!");
}
//目录结尾
if (!TargetDirectory.EndsWith("\")) { TargetDirectory = TargetDirectory + "\"; }

using (ZipInputStream zipfiles = new ZipInputStream(File.OpenRead(ZipFile)))
{
zipfiles.Password = Password;
ZipEntry theEntry;

while ((theEntry = zipfiles.GetNextEntry()) != null)
{
string directoryName = "";
string pathToZip = "";
pathToZip = theEntry.Name;

if (pathToZip != "")
directoryName = Path.GetDirectoryName(pathToZip) + "\";

string fileName = Path.GetFileName(pathToZip);

Directory.CreateDirectory(TargetDirectory + directoryName);

if (fileName != "")
{
if ((File.Exists(TargetDirectory + directoryName + fileName) && OverWrite) || (!File.Exists(TargetDirectory + directoryName + fileName)))
{
using (FileStream streamWriter = File.Create(TargetDirectory + directoryName + fileName))
{
int size = 2048;
byte[] data = new byte[2048];
while (true)
{
size = zipfiles.Read(data, 0, data.Length);

if (size > 0)
streamWriter.Write(data, 0, size);
else
break;
}
streamWriter.Close();
}
}
}
}

zipfiles.Close();
}
return true;
}
catch (Exception ex)
{

NLogger.Error("解压失败：" + ex.ToString());

return false;
}

}