public static IAsyncResult BeginReadToEnd(this Stream stream, byte[] buffer, int offset, int count, AsyncCallback callback, Object state)
{
byte[] tempBuffer = new byte[count];
ByteArrayAsyncResult result = new ByteArrayAsyncResult(callback, state, buffer, offset, tempBuffer);
ByteArrayAsyncState asyncState = new ByteArrayAsyncState {Result = result, Stream = stream};
stream.BeginRead(tempBuffer, 0, count, OnRead, asyncState);
return result;
}
public static IAsyncResult BeginReadToEnd(this Stream stream, byte[] buffer, int offset, int count, AsyncCallback callback, Object state)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
byte[] tempBuffer = new byte[count];
ByteArrayAsyncResult result = new ByteArrayAsyncResult(callback, state, buffer, offset, tempBuffer);
ByteArrayAsyncState asyncState = new ByteArrayAsyncState {
Result = result, Stream = stream
};
stream.BeginRead(tempBuffer, 0, count, OnRead, asyncState);
return(result);
}
private static void OnRead(IAsyncResult ar)
{
ByteArrayAsyncState state = ar?.AsyncState as ByteArrayAsyncState;
if (state == null)
{
return;
}
int bytesRead = state.Stream.EndRead(ar);
if (bytesRead != 0)
{
Array.Copy(state.Result.TempBuffer, 0, state.Result.Result, state.Result.Index, bytesRead);
state.Result.Index += bytesRead;
state.Result.Length = state.Result.Index;
state.Stream.BeginRead(state.Result.TempBuffer, 0, state.Result.Result.Length - state.Result.Length, OnRead, state);
return;
}
state.Result.Complete(false);
}
