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C#调用动态unlha32.dll解压Lha后缀的打包文件分享

发布时间：2023-03-01 19:12:38 来源：网络

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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;
 }

 }
}