private static void ReadAsyncCallback(IAsyncResult ar)
{
FileAsyncState state = ar.AsyncState as FileAsyncState;
int length = state.src.EndRead(ar);
state.dst.Write(state.buffer, 0, length);
if (length < FileAsyncState.MAX_READ)
{
if (state.autoClose)
{
state.src.Close();
state.dst.Close();
}
state.isDone = true;
return;
}
state.src.BeginRead(state.buffer, 0, FileAsyncState.MAX_READ, ReadAsyncCallback, state);
}
public static void CopyAsync(FileAsyncState state)
{
state.src.BeginRead(state.buffer, 0, FileAsyncState.MAX_READ, ReadAsyncCallback, state);
}
