C#网络TCP服务器端的实现
1、实现代码
private const int BACK_LOG = 5;
private Socket tcpServer;
private Socket tcpClient1;
private CancellationTokenSource cts = new CancellationTokenSource();
private void btServerStart_Click(object sender, EventArgs e)
{
if (this.btServerStart.Text == "打开")
{
//Socket实例化
tcpServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//创建EndPoint
EndPoint ep = new IPEndPoint(IPAddress.Parse(this.tbServerIPAddress.Text), int.Parse(this.tbServerPort.Text));
try
{
//绑定
tcpServer.Bind(ep);
}catch(Exception ex)
{
MessageBox.Show("服务器打开失败:" ex.Message);
return;
}
MessageBox.Show("服务器打开成功");
this.btServerStart.Text = "关闭";
tcpServer.Listen(BACK_LOG);
Task.Run(new Action(() =>
{
ListenConnection();
}));
}
else
{
tcpServer?.Close();
this.btServerStart.Text = "打开";
}
}
private void ListenConnection()
{
while (true)
{
Socket tcpClient = tcpServer.Accept();
tcpClient1 = tcpClient;
Task.Run(new Action(() =>
{
ReceiveSource(tcpClient);
}));
}
}
private void ReceiveSource(Socket tcpClient)
{
while (!cts.IsCancellationRequested)
{
byte[] buffer = new byte[1024 * 10];
int length = -1;
try
{
length = tcpClient.Receive(buffer, SocketFlags.None);
}
catch (Exception ex)
{
break;
}
if (length > 0)
{
byte[] result = new byte[length];
Buffer.BlockCopy(buffer, 0, result, 0, length);
ReceiveDataDisplay(result);
}
}
}
private void ReceiveDataDisplay(byte[] result)
{
string str = System.Text.Encoding.Default.GetString(result);
if (tbServerReceiver.InvokeRequired)
{
MethodInvoker mi = delegate ()
{
string str1 = tbServerReceiver.Text;
tbServerReceiver.Text = str1 Environment.NewLine str;
};
tbServerReceiver.Invoke(mi);
}
else
{
string str1 = tbServerReceiver.Text;
tbServerReceiver.Text = str1 "/n" str;
}
}
private void btServerSend_Click(object sender, EventArgs e)
{
if (tcpClient1.Connected)
{
string str = this.tbServerSender.Text;
if (str.Length > 0)
{
byte[] b = System.Text.Encoding.Default.GetBytes(str);
try
{
tcpClient1.Send(b);
}catch(Exception ex)
{
MessageBox.Show("发送失败");
return;
}
}
}
}
2、运行效果
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