.net关于解压

1.可以调用电脑上的winrar程序进行解压， 缺点是电脑上必须装有winrar程序

#region WinRAR解压
/// <summary> 
/// 利用 WinRAR 进行解压缩 （前提是电脑上面安装了WinRAR解压软件）
/// </summary> 
/// <param name="path">文件解压路径（绝对）</param> 
/// <param name="rarPath">将要解压缩的 .rar 文件的存放目录（绝对路径）</param> 
/// <param name="rarName">将要解压缩的 .rar 文件名（包括后缀）</param> 
/// <returns>true 或 false。解压缩成功返回 true，反之，false。</returns> 
public static bool UnRAR(string path, string rarPath, string rarName)
{
bool flag = false;
string rarexe;
RegistryKey regkey;
Object regvalue;
string cmd;
ProcessStartInfo startinfo;
Process process;
try
{
//不同机器的winrar的注册码不同，根据情况而定路径 ApplicationsWinRAR.exeshellopencommand
regkey = Registry.LocalMachine.OpenSubKey(@"SOFTWAREClassesWinRARshellopencommand"); //目的是为了找到winrar.exe的路径，然后启动WinRAR
regvalue = regkey.GetValue("");
rarexe = regvalue.ToString();
regkey.Close();
rarexe = rarexe.Substring(1, rarexe.Length - 7);
Directory.CreateDirectory(path);
//解压缩命令，相当于在要压缩文件(rarName)上点右键 ->WinRAR->解压到当前文件夹 
cmd = string.Format("x {0} {1} -y", rarName, path);
startinfo = new ProcessStartInfo();
startinfo.FileName = rarexe;
startinfo.Arguments = cmd;
startinfo.WindowStyle = ProcessWindowStyle.Hidden;
startinfo.WorkingDirectory = rarPath;
process = new Process();
process.StartInfo = startinfo;
process.Start();
process.WaitForExit();
if (process.HasExited)
{
flag = true;
}
process.Close();
}
catch (Exception e)
{
throw e;
}
return flag;
}

#endregion

2.解压zip格式的文件，可以完全有C#代码进行实现

#region 解压zip文件

//zipFilePath:解压文件的绝对路径，ZipedFolder要解压到的文件夹的路径,Password解压文件的密码，可为null
public static bool ZipToFile(string zipFilePath, string ZipedFolder, string Password)
{
if (!File.Exists(zipFilePath))
{
return false;
}

if (!Directory.Exists(ZipedFolder))
{
Directory.CreateDirectory(ZipedFolder);
}

ZipInputStream s = null;
ZipEntry theEntry = null;

string fileName;
FileStream streamWriter = null;
try
{
s = new ZipInputStream(File.OpenRead(zipFilePath));
s.Password = Password;
while ((theEntry = s.GetNextEntry()) != null)
{
if (theEntry.Name != String.Empty)
{
fileName = Path.Combine(ZipedFolder, theEntry.Name);
///判断文件路径是否是文件夹
if (fileName.EndsWith("/") || fileName.EndsWith("\"))
{
Directory.CreateDirectory(fileName);
continue;
}
try
{
streamWriter = File.Create(fileName);
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;
}
}
}
catch { }
}
}
return true;
}
catch { return false; }
finally
{
if (streamWriter != null)
{
streamWriter.Close();
streamWriter = null;
}
if (theEntry != null)
{
theEntry = null;
}
if (s != null)
{
s.Close();
s = null;
}
GC.Collect();
GC.Collect(1);
}

}
#endregion