Socket是什么？
是套接字，除此之外我也不太清楚，先略过
直接上实例，首先服务端：
private int ServerPoint = ; //自定义端口号
private string ServerUser = "Tracy"; //自定义昵称
private Socket clientSK;
private delegate void AppendRich(string txt,string user); //定义委托是为了避免在AppendText时出现"richTextBox1不是该线程创建"的错误提示 private void Form1_Load(object sender, EventArgs e)
{
Thread listenThread = new Thread(new ThreadStart(AppInit));
listenThread.Start(); //用多线程是为了防止sk.Listen(10)一直处于监听状态，导致UI界面卡死
}
private void AppInit()
{
Socket sk = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
EndPoint endPoint = new IPEndPoint(IPAddress.Any, ServerPoint);
sk.Bind(endPoint); //实例化Socket并绑定端口
sk.Listen(); //开始监听，如果没有客户端连接将一直卡在这 clientSK = sk.Accept(); //客户端连接，把这个有效的Socket连接赋给全局变量clientSK，程序继续走
SendMsg("已成功连接到服务器", "系统消息"); AppendRich dele = new AppendRich(AppendToRich); //实例化一个委托 while (true) //用死循环保持一直通话
{
try
{
byte[] receiveBT = new byte[];
int receiveInt = clientSK.Receive(receiveBT); //获取接收的消息
if (receiveInt == ) //如果接收到空消息，跳出循环
{
break;
}
string receiveStr = Encoding.UTF8.GetString(receiveBT, , receiveInt); //接收的消息转为string
richTextBox1.Invoke(dele, new object[] { receiveStr.Substring(), receiveStr.Substring(, ).Trim() }); //添加到richbox中，这里我自定义了string的格式，分昵称和消息内容
}
catch (Exception ex)
{
break;
}
}
//此时跳出了循环，意味着程序即将关闭
clientSK.Close(); //关闭连接到客户端的Socket
sk.Close(); //关闭实例化的Socket
richTextBox1.Invoke(dele, new object[] { "连接已终止", "系统消息" }); //利用委托向RichTextBox1中添加String
}
private void SendMsg(string txt, string user)
{
string nickName = user;
string sendStr = nickName.PadLeft() + txt;
byte[] bs = Encoding.UTF8.GetBytes(sendStr);
clientSK.Send(bs, bs.Length, );//向客户端发送信息
}
private void AppendToRich(string txt,string user)
{
if (txt == string.Empty)
{
return;
}
if (user == ServerUser) //判断用户，以便区分颜色和字体
{
richTextBox1.SelectionFont = new Font(new FontFamily("宋体"), );
richTextBox1.SelectionColor = Color.Green;
}
else
{
richTextBox1.SelectionFont = new Font(new FontFamily("宋体"), );
richTextBox1.SelectionColor = Color.Blue;
}
richTextBox1.AppendText("\r\n" + user + " " + DateTime.Now.ToString("HH:mm:ss") + "\r\n"); if (user == ServerUser)
{
richTextBox1.SelectionFont = new Font(new FontFamily("楷体"), );
richTextBox1.SelectionColor = Color.FromArgb(, , );
}
else
{
richTextBox1.SelectionFont = new Font(new FontFamily("宋体"), );
richTextBox1.SelectionColor = Color.Black;
}
richTextBox1.AppendText(txt);
richTextBox1.ScrollToCaret();//滚动条保持最底部
textBox2.ResetText();
textBox2.Focus();
}
ServerCode
客户端：
private int ServerPoint = ; //自定义端口号，要与之前服务端一致
private string ClientUser = "诺克萨斯", ClientIP = "127.0.0.1"; //自定义昵称，以及服务端IP
private Socket newclient;
private delegate void AppendRich(string txt, string user); private void Form1_Load(object sender, EventArgs e)
{
Thread listenThread = new Thread(new ThreadStart(AppInit));
listenThread.Start();
} private void AppInit()
{ newclient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint ie = new IPEndPoint(IPAddress.Parse(ClientIP), ServerPoint); // 服务器的IP和端口
newclient.Connect(ie); //这里不需要绑定，直接连接到服务端
string hostName= Dns.GetHostName(); //获取客户端主机名
IPHostEntry iphostentry = Dns.GetHostEntry(hostName);
List<IPAddress> ips=iphostentry.AddressList.ToList(); //获取客户端IP SendMsg(ips[].ToString() + " 已连接", "系统消息");
AppendRich dele = new AppendRich(AppendToRich); while (true)
{
try
{
byte[] receiveBT = new byte[];
int receiveInt = newclient.Receive(receiveBT); //获取接收的消息
if (receiveInt == )
{
break;
}
string receiveStr = Encoding.UTF8.GetString(receiveBT, , receiveInt); //接收的消息转为string
richTextBox1.Invoke(dele, new object[] { receiveStr.Substring(), receiveStr.Substring(, ).Trim() }); //添加到richbox中
}
catch(Exception ex)
{
break;
}
}
newclient.Close();
richTextBox1.Invoke(dele, new object[] { "连接已终止", "系统消息" });
}
private void SendMsg(string txt, string user)
{
string nickName = user;
string sendStr = nickName.PadLeft() + txt;
byte[] bs = Encoding.UTF8.GetBytes(sendStr);
newclient.Send(bs, bs.Length, );//发送信息
}
private void AppendToRich(string txt, string user)
{
if (txt == string.Empty)
{
return;
}
richTextBox1.AppendText("\r\n" + user + " " + DateTime.Now.ToString("HH:mm:ss") + "\r\n" + txt);
richTextBox1.ScrollToCaret();//滚动条保持最底部
textBox1.ResetText();
textBox1.Focus();
}
ClientCode