private static void readCallback(IAsyncResult ar)
{
CopyState state = ar.AsyncState as CopyState;
var rlen = state.From.EndRead(ar);
state.ReadSize += rlen;
state.To.Write(state.Buffer, 0, rlen);
state.WriteSize += rlen;
}
public static void StreamCopy(Stream from, Stream to)
{
CopyState cstate = new CopyState(from, to);
do
{
var aresult = from.BeginRead(cstate.Buffer, 0, CopyState.BUFFER_SIZE, readCallback, cstate);
aresult.AsyncWaitHandle.WaitOne();
} while (cstate.ReadSize != cstate.FileLength && cstate.WriteSize != cstate.FileLength);
to.Flush();
}
private static void writeCallback(IAsyncResult ar)
{
CopyState state = ar.AsyncState as CopyState;
state.To.EndWrite(ar);
}