WP8之Socket ——作为服务端接收消息
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网上都说WP8 socket已经开始支持服务端,但是在网上总找不到代码,经过研究,以下的方式可以实现监听。
代码:
//监听用
private Socket socketListen = null;
private SocketAsyncEventArgs socketEventArgListen = new SocketAsyncEventArgs();
//监听成功后获取已经连接的socket
private Socket socketConnect = null;
private SocketAsyncEventArgs socketEventArgConnect = null;
//初始化socket
socketListen = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socketListen.Bind(new IPEndPoint(IPAddress.Any, Constants.TCP_SERVER_PORT));
//异步socket操作执行完成后触发的事件
socketEventArgListen.Completed += socketEventArgListen_Completed;
//监听函数
public string Listen()
{
response = "Error";
clientDone.Reset();
socketListen.Listen(5);
socketEventArgListen.SetBuffer(new Byte[Constants.IO_BUF_SIZE], 0, Constants.IO_BUF_SIZE);
//如果监听同步完成
if (!socketListen.AcceptAsync(socketEventArgListen))
{
socketEventArgListen_Completed(socketListen, socketEventArgListen);
return response;
}
//监听异步完成
clientDone.WaitOne(Constants.TIMEOUT_MILLISECONDS);
return response;
}
//操作完成后执行
private void socketEventArgListen_Completed(object sender, SocketAsyncEventArgs e)
{
response = e.SocketError.ToString();
switch (e.LastOperation)
{
//当客户端发来Connect消息时,服务端会通过AcceptAsync接受,接受成功会执行下面代码
case SocketAsyncOperation.Accept:
//得到客户端发来的消息
response = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred);
response = response.Trim('\0');
if (response == "")
{
response = "Error";
}
//得到已连接的socket,此后就可以用这个socket执行发送和接收了
socketConnect = e.AcceptSocket;
socketEventArgConnect = e;
break;
case SocketAsyncOperation.Send:
break;
//when receive, we can get the Buffer
case SocketAsyncOperation.Receive:
response = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred);
response = response.Trim('\0');
if (response == "")
{
response = "Error";
}
break;
default:
break;
}
clientDone.Set();
}
//作为服务端向客户端发消息,
public string SendServer(Socket isocket,SocketAsyncEventArgs isocketEvent,string idata)
{
response = "Error";
if (isocket != null)
{
byte[] payload = Encoding.UTF8.GetBytes(idata);
isocketEvent.SetBuffer(payload, 0, payload.Length);
clientDone.Reset();
//如果发送同步完成
if (!isocket.SendAsync(isocketEvent))
{
socketEventArgListen_Completed(isocket, isocketEvent);
return response;
}
clientDone.WaitOne(Constants.TIMEOUT_MILLISECONDS);
}
else
{
response = "Socket is not initialized";
}
return response;
}
//作为服务端接收来自客户端的消息
public string ReceiveServer(Socket isocket, SocketAsyncEventArgs isocketEvent, int ibuffersize)
{
response = "Error";
if (isocket != null)
{
clientDone.Reset();
byte[] temp = new byte[ibuffersize];
isocketEvent.SetBuffer(temp, 0, ibuffersize);
//如果同步完成
if (!isocket.ReceiveAsync(isocketEvent))
{
socketEventArgListen_Completed(isocket, isocketEvent);
return response;
}
clientDone.WaitOne(Constants.TIMEOUT_MILLISECONDS);
}
else
{
response = "Socket is not initialized";
}
return response;
}
具体使用的时候:
当我们拿到socketConnect和socketEventArgConnect后,可以执行:
SendServer(socketConnect, socketEventArgConnect, strdata )向客户端发送消息
ReceiveServer(socketConnect, socketEventArgConnect, size)从buffer中拿消息
使用完成后记得关闭Socket,上述代码在楼主的手机上顺利执行,但是当网络不好的时候,会出现丢失数据的现象,现在正在优化,如果有研究WP8 Socket的大牛,请多多指导。
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