internal SevenZipLibrary(string sevenZipLibPath)
{
if (!File.Exists(sevenZipLibPath))
{
throw new FileNotFoundException("Required file not found.", sevenZipLibPath);
}
_libHandle = NativeMethods.LoadLibrary(sevenZipLibPath);
if (_libHandle.IsInvalid)
{
throw new Win32Exception("LoadLibrary call for 7z.dll failed: invalid handle!");
}
IntPtr functionPtr = NativeMethods.GetProcAddress(_libHandle, "GetHandlerProperty");
if (functionPtr == IntPtr.Zero)
{
_libHandle.Close();
throw new ArgumentException("7z library: invalid DLL!");
}
}
public static extern IntPtr GetProcAddress(
SafeLibraryHandle hModule,
[MarshalAs(UnmanagedType.LPStr)] string procName);
protected void Dispose(bool disposing)
{
_libHandle.Close();
_libHandle = null;
}
