using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;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;
namespace Lab_5{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }
        private void StartWindow(string userName, int left, int top)        {            ChatCline w = new ChatCline();            w.Left = left;            w.Top = top;            w.UserName = userName;            w.Owner = this;            w.Closed += (sender, e) => this.Activate();//关闭子窗体时激活父窗体            w.Show();        }
        private void bt1_Click(object sender, RoutedEventArgs e)        {            StartWindow("用户1", 0, 0);            StartWindow("用户2", 400, 300);        }
        private void bt2_Click(object sender, RoutedEventArgs e)        {            ChatCline w = new ChatCline();            w.Owner = this;            w.Closed += (sendObj, args) => this.Activate();            w.Show();        }    }}

using Lab_5.ServiceReference1;using System;using System.Collections.Generic;using System.ComponentModel;using System.Linq;using System.ServiceModel;using System.Text;using System.Threading.Tasks;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.Shapes;
namespace Lab_5{    /// <summary>    /// ChatCline.xaml 的交互逻辑    /// </summary>    public partial class ChatCline : Window,IService1Callback    {        public ChatCline()        {            InitializeComponent();            this.Closing += ChatCline_Closing;            box.Visibility = System.Windows.Visibility.Hidden;        }
        private Service1Client client;
        public string UserName        {            get { return textbox.Text; }            set { textbox.Text = value; }        }
        private void ChatCline_Closing(object sender, CancelEventArgs e)        {            if (client != null)            {                client.Logout(UserName);                 client.Close();            }        }
        private void AddMessage(string str)        {            TextBlock t = new TextBlock();            t.Text = str;            listmessage.Items.Add(t);        }
        public void InitUsersInfo(string UsersInfo)        {            if (UsersInfo.Length == 0) return;            string[] users = UsersInfo.Split('、');            for (int i = 0; i < users.Length; i++)            {                listbox.Items.Add(users[i]);            }        }
        public void ShowLogin(string loginUserName)        {            if (loginUserName == UserName)            {                box.Visibility = System.Windows.Visibility.Visible;            }            listbox.Items.Add(loginUserName);        }
        public void ShowLogout(string userName)        {            listbox.Items.Remove(userName);        }
        public void ShowTalk(string userName, string message)        {            AddMessage(userName+"说: "+message);        }
        private void login_Click(object sender, RoutedEventArgs e)        {            UserName = textbox.Text;            InstanceContext context = new InstanceContext(this);            client = new Service1Client(context);            try            {                client.Login(textbox.Text);                login.IsEnabled = false;            }            catch (Exception ex)            {                MessageBox.Show("与服务端连接失败：" + ex.Message);                return;            }        }
        private void launch_Click(object sender, RoutedEventArgs e)        {            client.Talk(UserName, messagebox.Text);            messagebox.Text = "";        }

        private void messagebox_KeyDown(object sender, KeyEventArgs e)        {            if (e.Key == Key.Enter)            {                client.Talk(UserName, messagebox.Text);                messagebox.Text = "";            }        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;
namespace WcfServiceLibrary1{    class Users    {        public string UserName { get; set; }        public readonly IService1Callback callback;
        public Users(string userName, IService1Callback callback)        {            this.UserName = userName;            this.callback = callback;        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;
namespace WcfServiceLibrary1{    class CC    {        public static List<Users> Users { get; set; }
        static CC()        {            Users = new List<Users>();        }
        public static Users GetUser(string userName)        {            Users user = null;            foreach (var v in Users)            {                if (v.UserName == userName)                {                    user = v;                    break;                }            }            return user;        }    }}

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.Text;
namespace WcfServiceLibrary1{    [ServiceContract(Namespace = "IService",        CallbackContract = typeof(IService1Callback))]    // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的接口名“IService1”。    public interface IService1    {
        // TODO: 在此添加您的服务操作        [OperationContract(IsOneWay = true)]        void Login(string userName);
        [OperationContract(IsOneWay = true)]        void Logout(string userName);
        [OperationContract(IsOneWay = true)]        void Talk(string userName, string message);    }

    public interface IService1Callback    {        [OperationContract(IsOneWay = true)]        void ShowLogin(string loginUserName);
        [OperationContract(IsOneWay = true)]        void ShowLogout(string userName);
        [OperationContract(IsOneWay = true)]        void ShowTalk(string userName, string message);
        [OperationContract(IsOneWay = true)]        void InitUsersInfo(string UsersInfo);    }
}

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.Text;
namespace WcfServiceLibrary1{    // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的类名“Service1”。    public class Service1 : IService1    {        public void Login(string userName)        {            OperationContext context = OperationContext.Current;            IService1Callback callback = context.GetCallbackChannel<IService1Callback>();            Users newUser = new Users(userName, callback);            string str = "";            for (int i = 0; i < CC.Users.Count; i++)            {                str += CC.Users[i].UserName + "、";            }            newUser.callback.InitUsersInfo(str.TrimEnd('、'));            CC.Users.Add(newUser);            foreach (var user in CC.Users)            {                user.callback.ShowLogin(userName);            }        }
        public void Logout(string userName)        {            Users logoutUser = CC.GetUser(userName);            CC.Users.Remove(logoutUser);            logoutUser = null;            foreach (var user in CC.Users)            {                user.callback.ShowLogout(userName);            }        }
        public void Talk(string userName, string message)        {            Users user = CC.GetUser(userName);            foreach (var v in CC.Users)            {                v.callback.ShowTalk(userName, message);            }        }    }}