public static void CopyFile(string source, string destination,
Kernel32.CopyFileOptions options, Kernel32.CopyFileCallback callback, object state)
{
if (source == null)
{
throw new ArgumentNullException("source");
}
if (destination == null)
{
throw new ArgumentNullException("destination");
}
if ((options & ~Kernel32.CopyFileOptions.All) != 0)
{
throw new ArgumentOutOfRangeException("options");
}
//new FileIOPermission(FileIOPermissionAccess.Read, source).Demand();
//new FileIOPermission(FileIOPermissionAccess.Write, destination).Demand();
if (new FileInfo(source).Length <= FILESIZE_TRANSFER_ATOM)
{
File.Copy(source, destination, true);
}
else
{
Kernel32.CopyProgressRoutine cpr = callback == null ?
null : new Kernel32.CopyProgressRoutine(new Kernel32.CopyProgressData(
source, destination, callback, state).CallbackHandler);
bool cancel = false;
if (!Kernel32.CopyFileEx(source, destination, cpr, IntPtr.Zero, ref cancel, (int)options))
{
int err = Kernel32.GetLastError();
if (err != WinError.S_OK)
{
throw new Win32Exception(err);
}
}
}
}
public static void CopyFile(string source, string destination,
Kernel32.CopyFileOptions options, Kernel32.CopyFileCallback callback)
{
CopyFile(source, destination, options, callback, null);
}