C#调用动态unlha32.dll解压Lha后缀的打包文件分享


            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:\Windows\System32目录下