使用socket模拟服务器给客户端发消息

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

using System.Net;
using System.Net.Sockets;
using System.Threading;
namespace service
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
         
          
        }

        Thread threadWatch = null;
        Socket Mysocket = null;
        //接受缓存
        byte[] arrMsgRec = new byte[1024 * 1024 * 2];
        Socket policy = null;
        Dictionary<string, Socket> SoketList = new Dictionary<string, Socket>();
        Thread threadRece = null;
        private void WatchConnection()
        {

                showMessage("等待客户连接");
              
                while (true)
                {
                    policy = Mysocket.Accept();
                    Socket policynew = policy;
                    showMessage("连接成功");
                 
                    ListBox ClientListbox = ClientListboxs;
                    ClientListbox.Dispatcher.Invoke(new Action(() => { ClientListbox.Items.Add(policynew.RemoteEndPoint.ToString()); }));
                    
                    SoketList.Add(policynew.RemoteEndPoint.ToString(), policy);
                    if (threadRece == null)
                    {
                        threadRece = new Thread(Rece);
                        threadRece.IsBackground = true;
                        threadRece.Start();
                    }
                }
           
        }
        /// <summary>
        /// 只能
        /// </summary>
        private void Rece()
        {
            while (true)
            {
                int strlong = policy.Receive(arrMsgRec);

                string strMsgRec = System.Text.Encoding.UTF8.GetString(arrMsgRec, 0, strlong);
                showMessage(strMsgRec);
            }
        }
        private void StartSocket()
        {
            //创建监听套接字
            Mysocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //获取ip对象
            IPAddress address = IPAddress.Parse("192.168.1.54");
            //创建IP和端口
            IPEndPoint endpoint = new IPEndPoint(address, int.Parse("8080"));
            Mysocket.Bind(endpoint);
            //监听队列长度
            Mysocket.Listen(10);
            threadWatch = new Thread(WatchConnection);
            threadWatch.IsBackground = true;
            threadWatch.Start();

        }
        private void showMessage(string msg)
        {
            Action action = () => MsgContent.AppendText(msg+"\r\n");
            if (System.Threading.Thread.CurrentThread !=
        MsgContent.Dispatcher.Thread)
            {
                MsgContent.Dispatcher.Invoke
                    (System.Windows.Threading.DispatcherPriority.Normal,
                    action);
            }
            else
            {
                action();
            }
           
        }
       
        private void start_Click_1(object sender, RoutedEventArgs e)
        {
            StartSocket();
        }

//显示发送的历史消息
        //public void Sends()
        //{
        //    string Msg = MsgContent1.Text;
        //    byte[] btMsg = System.Text.Encoding.UTF8.GetBytes(Msg);
        //    Mysocket.Send(btMsg);
        //    showMessage("发送：" + Msg);

        //}
        private void send(object sender, RoutedEventArgs e)
        {
            policy.Send(System.Text.Encoding.UTF8.GetBytes(MsgContext.Text));
          //  Sends();
            MsgContext.Text = "";
        }

      
        ListBox ClientListboxs = null;
        private void LoadGrid(object sender, RoutedEventArgs e)
        {
            Grid grid = sender as Grid;
            foreach (var child in grid.Children)
            {
                if (child is ListBox)
                {
                    if ((child as ListBox).Name == "ClientListbox")
                        ClientListboxs = child as ListBox;
                }
            }
        }
        private void ClientListbox_Selected_1(object sender, SelectionChangedEventArgs e)
        {
            ListBox ClientListbox = ClientListboxs;
            string clientSelected = ClientListbox.SelectedItem.ToString();
            policy = SoketList[clientSelected];
        }

        private void MsgContext_TextChanged(object sender, TextChangedEventArgs e)
        {
           // sendMsg.Enabled = MsgContext.Text.Trim() != String.Empty; 
            
        }
       
    }
}

以上是服务器端代码，下面是客户端

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Threading;

using System.Net;
using System.Threading;
using System.Net.Sockets;
namespace Barrage
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    /// 
    public partial class MainWindow : Window
    {
        Thread BarrageThread = null;

        public MainWindow()
        {
            InitializeComponent();
          Connect.Click += (o, s) => { client(); };
          // client();
         
        }

        string firsttxt = "弹幕测试中";
      
      
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            this.Left = 0.0;
            this.Top = 0.0;
            this.Width = System.Windows.SystemParameters.PrimaryScreenWidth;
            this.Height = System.Windows.SystemParameters.PrimaryScreenHeight;

            BarrageThread = new Thread(() =>
            {
                for (int i = 0; i < 105; )
                {
                    Random rd = new Random();

                    //SetBarrage("上海思来氏信息咨询有限公司欢迎你".PadLeft(rd.Next(5, 30), '啦'), i);
                    SetBarrage("" + firsttxt + "".PadLeft(rd.Next(5, 10), '啦'), i);
                    if (i == 104) { i = 0; } else { i++; }

                    System.Threading.Thread.Sleep(240);
                }
            });

            BarrageThread.Start();
        }

        public void SetBarrage(string content, int img)
        {
            Dispatcher.Invoke(DispatcherPriority.Normal, new Action(() =>
            {
                Dictionary<object, double> ldi = new Dictionary<object, double>();

                int lines = (Convert.ToInt32(this.Height) -100) / 2;
                int line = 1;

                Random rd = new Random();
                    for (int i = 0; i < lines; i++) { ldi.Add(i, 0); }

                //foreach (StackPanel item in canvas.Children)
                //{
                //    if (ldi.ContainsKey(item.Tag))
                //    {
                //        if (ldi[item.Tag] < Convert.ToDouble(item.GetValue(Canvas.LeftProperty)))
                //        {
                //            ldi[item.Tag] = Convert.ToDouble(item.GetValue(Canvas.LeftProperty));
                //        }
                //    }
                //    else
                //    { 
                //        ldi.Add(item.Tag, Convert.ToDouble(item.GetValue(Canvas.LeftProperty)));
                //    }
                //}

                if (ldi.Count(m => m.Value == 0) > 1)
                {                                
                    var list = ldi.Where(m => m.Value == 0).ToList();

                    line = Convert.ToInt32(list[rd.Next(0, list.Count)].Key);
                }
                else
                {
                    line = Convert.ToInt32(ldi.OrderBy(m => m.Value).FirstOrDefault().Key);
                }

                #region StackPanel
                StackPanel sp = new StackPanel();
                //调整行高与行距
                sp.Tag = line;
                sp.Orientation = Orientation.Horizontal;
                sp.SetValue(Canvas.LeftProperty, this.Width);
                sp.SetValue(Canvas.TopProperty, Convert.ToDouble(40* line) + 1);

                TextBlock tb = new TextBlock();

                tb.VerticalAlignment = System.Windows.VerticalAlignment.Center;
             //调整字体大小
                tb.FontSize = 20;
                tb.Text = content;
             //调整字体颜色
                tb.Foreground = new SolidColorBrush(Color.FromRgb(
                  Convert.ToByte(rd.Next(0, 255)),
                  Convert.ToByte(rd.Next(0, 255)),
                  Convert.ToByte(rd.Next(0, 255))));

                sp.Children.Add(tb);

                GifImage gi = new GifImage();
                //字体后面添加表情
                gi.Width = 24;
                gi.Height =24;
                gi.Source = "images/e" + (img + 100) + ".gif";

                sp.Children.Add(gi);

                canvas.Children.Add(sp);

                //TimeSpan.FromSeconds(20) 调整滚动速度
                DoubleAnimation animation =
                    new DoubleAnimation(this.Width, -this.Width, new Duration(TimeSpan.FromSeconds(20)));

                animation.Completed += new EventHandler((object o, EventArgs arg) =>
                {
                    canvas.Children.Remove(sp);
                });

                sp.BeginAnimation(Canvas.LeftProperty, animation);

                #endregion
            }));
        }
        protected override void OnClosed(EventArgs e)
        {
            BarrageThread.Abort();

            base.OnClosed(e);

            Application.Current.Shutdown();
        }
      //  Socket 接受服务器响应
        Socket Mysocket = null;
        byte[] arrMsgRec = new byte[1024 * 1024 * 2];
        public void client()
        {
            Mysocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //获取ip对象
            IPAddress address = IPAddress.Parse("192.168.1.54");
            //创建IP和端口
            IPEndPoint endpoint = new IPEndPoint(address, int.Parse("8080"));
            
                Mysocket.Connect(endpoint);
                Thread threadWatch = new Thread(ReceiveMsg);
                threadWatch.IsBackground = true;
                threadWatch.Start();
            
           
        }
        //接收信息
        public void ReceiveMsg()
        {
            while (true)
            {

                int strlong = Mysocket.Receive(arrMsgRec);

                string strMsgRec = System.Text.Encoding.UTF8.GetString(arrMsgRec, 0, strlong);
                // strMsgRec = firsttxt;
                firsttxt = strMsgRec;
                showMessage(firsttxt);
            }
        }
        //显示信息
        private void showMessage(string msg)
        {
            Action action = () => MsgContent.AppendText(msg + "\r\n");
            if (System.Threading.Thread.CurrentThread !=
            MsgContent.Dispatcher.Thread)
            {
                MsgContent.Dispatcher.Invoke
                    (System.Windows.Threading.DispatcherPriority.Normal,
                    action);
            }
            else
            {
                action();
            }
        }
    }
}