本篇内容介绍了“如何实现C#调用动态unlha32.dll解压Lha后缀的打包文件”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!

复制代码 代码如下:
public class LhaUtity
    {
        ///取得DLL的版本
        [DllImport("unlha32")]
        private static extern UInt16 UnlhaGetVersion();
        /// 
        /// '取得DLL的执行情况
        /// 
        /// 
        [DllImport("unlha32")]
        private static extern  Boolean UnlhaGetRunning();
        /// 
        /// '文件检查
        /// 
        /// 
        /// 
        /// 
        [DllImport("unlha32")]
        private static extern Boolean UnlhaCheckArchive(String szFileName, Int32 iMode);
        /// 
        /// 文件解压缩
        /// 
        /// 
        /// 
        /// 
        /// 
        /// 
        [DllImport("unlha32")]
        private static extern int Unlha(int hwnd, string szCmdLine, string szOutput, int dwSize);
        /// 
        /// 需要解压的文件
        /// 
        /// 解压文件路径
        /// 解压到路径
        /// 是否删除
        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;
            }
        }
}
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