/// <summary>
/// Extends BeginWrite so that when a state object is not needed, null does not need to be passed.
/// <example>
/// deflatestream.BeginWrite(array, offset, count, asyncCallback);
/// </example>
/// </summary>
public static IAsyncResult BeginWrite(this DeflateStream deflatestream, Byte[] array, Int32 offset, Int32 count, AsyncCallback asyncCallback)
{
if (deflatestream == null)
{
throw new ArgumentNullException("deflatestream");
}
return(deflatestream.BeginWrite(array, offset, count, asyncCallback, null));
}
/// <summary>
/// Extends BeginWrite so that buffer offset of 0 and call to Array.Length are not needed.
/// <example>
/// deflatestream.BeginWrite(array, asyncCallback);
/// </example>
/// </summary>
public static IAsyncResult BeginWrite(this DeflateStream deflatestream, Byte[] array, AsyncCallback asyncCallback)
{
if (deflatestream == null)
{
throw new ArgumentNullException("deflatestream");
}
if (array == null)
{
throw new ArgumentNullException("array");
}
return(deflatestream.BeginWrite(array, 0, array.Length, asyncCallback));
}
public void AsyncWrite()
{
DeflateStream cs = new DeflateStream(new MemoryStream(), CompressionMode.Compress);
message = "AsyncWrite";
reset.Reset();
IAsyncResult r = cs.BeginWrite(new byte[1], 0, 1, new AsyncCallback(WriteCallback), cs);
Assert.IsNotNull(r, "IAsyncResult");
if (!reset.WaitOne(timeout, true))
{
Assert.Ignore("Timeout");
}
Assert.IsNull(message, message);
// the Close is currently buggy in Mono
// cs.Close ();
}
/// <summary>
/// Завершение чтения входного потока
/// </summary>
/// <param name="result">result - содержит manualEvent</param>
protected virtual void EndReadCallBack(IAsyncResult result)
{
ManualResetEvent me = (ManualResetEvent)result.AsyncState;
// Console.WriteLine("Read: Off={0} bytes={1}", offset, numBytes);
// Читаем блок данных в буфер
numBytes = fsStream.EndRead(result);
// Теперь в buf находится numBytes байтов, их надо упаковать
if (compressType == CompressType.Deflate)
{
result = dfStream.BeginWrite(buf, 0, numBytes, new AsyncCallback(EndWriteCallBack), me);
}
else
{
result = gzStream.BeginWrite(buf, 0, numBytes, new AsyncCallback(EndWriteCallBack), me);
}
}
/// <summary>Begins an asynchronous write operation.</summary>
/// <returns>An <see cref="T:System.IAsyncResult" /> object that represents the asynchronous write, which could still be pending.</returns>
/// <param name="array">The buffer containing data to write to the current stream.</param>
/// <param name="offset">The byte offset in <paramref name="array" /> at which to begin writing.</param>
/// <param name="count">The maximum number of bytes to write.</param>
/// <param name="asyncCallback">An optional asynchronous callback to be called when the write is complete.</param>
/// <param name="asyncState">A user-provided object that distinguishes this particular asynchronous write request from other requests.</param>
/// <exception cref="T:System.InvalidOperationException">The underlying stream is null. -or-The underlying stream is closed.</exception>
public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback cback, object state)
{
return(deflateStream.BeginWrite(buffer, offset, count, cback, state));
}