复制代码 代码如下:
public class LhaUtity
{
///取得DLL的版本
[DllImport("unlha32")]
private static extern UInt16 UnlhaGetVersion();
/// <summary>
/// '取得DLL的执行情况
/// </summary>
/// <returns>是否成功</returns>
[DllImport("unlha32")]
private static extern Boolean UnlhaGetRunning();
/// <summary>
/// '文件检查
/// </summary>
/// <param name="szFileName"></param>
/// <param name="iMode"></param>
/// <returns></returns>
[DllImport("unlha32")]
private static extern Boolean UnlhaCheckArchive(String szFileName, Int32 iMode);
/// <summary>
/// 文件解压缩
/// </summary>
/// <param name="hwnd"></param>
/// <param name="szCmdLine"></param>
/// <param name="szOutput"></param>
/// <param name="dwSize"></param>
/// <returns></returns>
[DllImport("unlha32")]
private static extern int Unlha(int hwnd, string szCmdLine, string szOutput, int dwSize);
/// <summary>
/// 需要解压的文件
/// </summary>
/// <param name="archiveFile">解压文件路径</param>
/// <param name="extractDir">解压到路径</param>
/// <param name="isDeleteFile">是否删除</param>
public static bool UnCompress(string archiveFile, string extractDir,bool isDeleteFile)
{
string extractFullPath = string.Empty;
string startPath = AppDomain.CurrentDomain.BaseDirectory;
if (!System.IO.File.Exists(archiveFile))
{
//判断需要解压的文件存不存
throw new Exception(string.Format("需要解压的{0}不存在", archiveFile));
}
try
{
UInt16 ver = LhaUtity.UnlhaGetVersion();
}
catch (Exception ex)
{
throw new Exception("没找到Unlha32.dll文件");
}
if (UnlhaGetRunning())
{
throw new Exception("DLL正在执行");
}
if (!UnlhaCheckArchive(archiveFile, 0))
{
throw new Exception("文件不能被解压缩");
}
//解压的路径
if (string.IsNullOrEmpty(extractDir))
{
extractFullPath =string.Format(@"{0}{1}", startPath,archiveFile.Substring(archiveFile.LastIndexOf("")+1,archiveFile.IndexOf(".lha")-1-archiveFile.LastIndexOf("")));
}
else
{
extractFullPath = extractDir;
}
if (!System.IO.Directory.Exists(extractFullPath))
{
System.IO.Directory.CreateDirectory(extractFullPath);
}
int ret = Unlha(0, string.Format("x "{0}" "{1}"", archiveFile, extractFullPath), null, 0);
if (ret != 0)
{
if (ret == 32800)
{
throw new Exception("文件解压缩取消");
}
else
{
throw new Exception("文件解压缩异常结束");
}
}
else
{
if (isDeleteFile)
{
System.IO.File.Delete(archiveFile);
}
return true;
}
}
}
项目中需要到解压这类型的文件，无从下手，上网看资料发现是日本常用的压缩算法之一，
查了很多资料，都没有好的办法解包，
后来找到这个dll可以解包的
但是网上的代码都是VB或者C的
唯有自己写成C#版本的，其实即使C#调用动态链接库
先到网上下载这个dll，然后把这个DLL放到C:WindowsSystem32目录下