NetworkStream BeginRead / EndRead
I'm really new to C# programming and I'm developing an application based on a TcpClient.
I would like to know how to use BeginRead & EndRead, I've already read MSN documentation but doesn't help.
I've this :
private void Send() { TcpClient _client = new TcpClient("host", 80); NetworkStream ns = _client.GetStream(); ns.Flush(); / ... ns.Write(buffer, 0, buffer.Length); int BUFFER_SIZE = 1024; byte[] received = new byte[BUFFER_SIZE]; ns.BeginRead(received, 0, 0, new AsyncCallback(OnBeginRead), ns); } private void OnBeginRead(IAsyncResult ar) { NetworkStream ns = (NetworkStream)ar.AsyncState; int BUFFER_SIZE = 1024; byte[] received = new byte[BUFFER_SIZE]; string result = String.Empty; ns.EndRead(ar); int read; while (ns.DataAvailable) { read = ns.开发者_Python百科Read(received, 0, BUFFER_SIZE); result += Encoding.ASCII.GetString(received); received = new byte[BUFFER_SIZE]; } result = result.Trim(new char[] { '\0' }); // Want to update Form here with result }
How can I update a Form component using result ?
Thanks for help.
First, I recommend learning a lot about multithreading. Then come back and learn about sockets. Both of these have rather steep learning curves, and trying to tackle both is a lot to handle.
That said, you can post an update to the UI by capturing the UI context via TaskScheduler.FromCurrentSynchronizationContext
and scheduling a Task
to that TaskScheduler
. If the TPL isn't available, then you can just use SynchronizationContext
directly.
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