Socket -Server

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public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void btnStart_Click(object sender, EventArgs e)
{
try
{
//当点击开始监听的时候 在服务器端创建一个负责监IP地址跟端口号的Socket
Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPAddress ip = IPAddress.Any;//IPAddress.Parse(txtServer.Text);
//创建端口号对象
IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));
//监听
socketWatch.Bind(point);
ShowMsg("监听成功");
socketWatch.Listen(10);

Thread th = new Thread(Listen);
th.IsBackground = true;
th.Start(socketWatch);
}
catch
{ }
}
/// <summary>
/// 等待客户端的连接 并且创建与之通信用的Socket
/// </summary>
///
Socket socketSend;
void Listen(object o)
{
Socket socketWatch = o as Socket;
//等待客户端的连接 并且创建一个负责通信的Socket
while (true)
{
try
{
//负责跟客户端通信的Socket
socketSend = socketWatch.Accept();
//将远程连接的客户端的IP地址和Socket存入集合中
dicSocket.Add(socketSend.RemoteEndPoint.ToString(), socketSend);
//将远程连接的客户端的IP地址和端口号存储下拉框中
cboUsers.Items.Add(socketSend.RemoteEndPoint.ToString());
//192.168.11.78：连接成功
ShowMsg(socketSend.RemoteEndPoint.ToString() + ":" + "连接成功");
//开启 一个新线程不停的接受客户端发送过来的消息
Thread th = new Thread(Recive);
th.IsBackground = true;
th.Start(socketSend);
}
catch
{ }
}
}

//将远程连接的客户端的IP地址和Socket存入集合中
Dictionary<string, Socket> dicSocket = new Dictionary<string, Socket>();

/// <summary>
/// 服务器端不停的接受客户端发送过来的消息
/// </summary>
/// <param name="o"></param>
void Recive(object o)
{
Socket socketSend = o as Socket;
while (true)
{
try
{
//客户端连接成功后，服务器应该接受客户端发来的消息
byte[] buffer = new byte[1024 * 1024 * 2];
//实际接受到的有效字节数
int r = socketSend.Receive(buffer);
if (r == 0)
{
break;
}
string str = Encoding.UTF8.GetString(buffer, 0, r);
ShowMsg(socketSend.RemoteEndPoint + ":" + str);
}
catch
{ }
}
}

void ShowMsg(string str)
{
txtLog.AppendText(str + "\r\n");
}

private void Form1_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}
/// <summary>
/// 服务器给客户端发送消息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSend_Click(object sender, EventArgs e)
{
string str = txtMsg.Text;
byte[] buffer = System.Text.Encoding.UTF8.GetBytes(str);
List<byte> list = new List<byte>();
list.Add(0);
list.AddRange(buffer);
//将泛型集合转换为数组
byte[] newBuffer = list.ToArray();
//buffer = list.ToArray();不可能
//获得用户在下拉框中选中的IP地址
string ip = cboUsers.SelectedItem.ToString();
dicSocket[ip].Send(newBuffer);
// socketSend.Send(buffer);
}

/// <summary>
/// 选择要发送的文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSelect_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.InitialDirectory = @"C:\Users\SpringRain\Desktop";
ofd.Title = "请选择要发送的文件";
ofd.Filter = "所有文件|*.*";
ofd.ShowDialog();

txtPath.Text = ofd.FileName;
}

private void btnSendFile_Click(object sender, EventArgs e)
{
//获得要发送文件的路径
string path = txtPath.Text;
using (FileStream fsRead = new FileStream(path, FileMode.Open, FileAccess.Read))
{
byte[] buffer = new byte[1024 * 1024 * 5];
int r = fsRead.Read(buffer, 0, buffer.Length);
List<byte> list = new List<byte>();
list.Add(1);
list.AddRange(buffer);
byte[] newBuffer = list.ToArray();
dicSocket[cboUsers.SelectedItem.ToString()].Send(newBuffer, 0, r+1, SocketFlags.None);
}
}

/// <summary>
/// 发送震动
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnZD_Click(object sender, EventArgs e)
{
byte[] buffer = new byte[1];
buffer[0] = 2;
dicSocket[cboUsers.SelectedItem.ToString()].Send(buffer);
}
}

Socket -Server

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原文地址：http://www.cnblogs.com/stelva/p/4448881.html