在 2 wpf windows 之间发送信息

Question

我们有 2 个 windows 打开，喜欢聊天

这是文本框和按钮的样子：

private void textBox_chat_TextChanged(object sender, TextChangedEventArgs e)
{
}

private void button_enviar_Click(object sender, RoutedEventArgs e)
{
    string chatMessage = textBox_chat.Text;
}

我想知道如何通过按下按钮 "button_enviar" 发送文本框中插入的信息。并打印到另一个window。我一直在寻找类似 Application.Current.Windows 的东西...但仍然没有找到实现它的方法。

我的代码实际上是这样的：

主窗口

   namespace WpfApplication1
{
    /// <summary>
    /// Lógica de interacción para MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();
            }

            // automatic code generated by the button
            private void button_entrar_Click(object sender, RoutedEventArgs e)
            {
                // we catch the taxt input in the texBox
                string userLoginName = textBox_pantalla_inicial.Text;

                // We call the chat window
                Window window1 = new Window1();
                // we put the user name as the title of the chat window
                window1.Title = userLoginName;
                // show the chat window
                window1.Show();            
            }       
        }
    }

聊天窗口

namespace WpfApplication1
{
    /// <summary>
    /// Lógica de interacción para Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            // inicialize chatWindow
            InitializeComponent();            
        }

        private void textBox_chat_TextChanged(object sender, TextChangedEventArgs e)
        {

        }

        private void button_enviar_Click(object sender, RoutedEventArgs e)
        {
            string chatMessage = textBox_chat.Text;

        }       

        private void button_erase_Click(object sender, RoutedEventArgs e)
        {

        }
    }
}

Answer 1

首先，您应该研究与 XAML 的绑定，例如 here。这样，在您的 C# 代码中，您无需关心使用的 UI 控件——如果您不喜欢某些内容或想要改进，您可以轻松地更改 XAML 中的那些控件你的 window.

你只需要把你的MainWindow 和ChatWindow 想成对象。您可以通过多种方式完成这项工作。最简单的方法之一是在您的聊天 window 中创建一个事件，您的主要 window 在创建聊天 window 时订阅该事件。每当用户输入他的消息时，聊天 window 引发事件并通过事件中的参数传递文本，主要 window 捕获然后可以调用方法（或设置属性) 在所有聊天 windows 中它都在跟踪，以便消息传递到所有聊天 windows。

一个简单的例子（自由打字，未经测试）：

public class MainWindow : Window
{
    List<ChatWindow> chatWindows = new List<ChatWindow>();
    public void AddChatWindow()
    {
        ChatWindow win = new ChatWindow();
        win.NewMessage += MessageReceived;
        win.Show();
        chatWindows.Add(win);
    }
    void MessageReceived(object sender, MessageEventArgs e)
    {
        ChatWindow me = sender as ChatWindow;
        if (me != null)
        {
            foreach (ChatWindow win in chatWindows)
            {
                if (win != me)
                {
                    win.Add(e.Message);
                }
            }
        }
    }
}

public class ChatWindow : Window
{
    public event EventHandler<MessageEventArgs> NewMessage;

    public void Add(string message)
    {
        Messsage += message;
    }
    public void UpdateText(string text)
    {
        if (NewMessage != null)
        {
            NewMessage(this, new MessageEventArgs(Message = text));
        }
    }
    public string Message {get;set;}
}
public class MessageEventArgs : EventArgs
{
     public string Message{get;set;}
}

Answer 2

我设置了一些使用事件的示例代码：

    public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    ChatMsgDispacher _chatMsgDispacher = new ChatMsgDispacher();
    public ChatChild GetNewChat()
    {
        var child = new ChatChild(); //or where you create the child
        child.SetMsgDispacher(_chatMsgDispacher);
        return child;
    }
}

public class ChatMsgDispacher
{
    public delegate void ChatMsgDelegate(string msg);
    public event ChatMsgDelegate MessageUpdate;

    public void Update(string msg)
    {
        if (MessageUpdate != null)
        {
            MessageUpdate(msg);
        }
    }
}


public class ChatChild
{
    private ChatMsgDispacher _msgDispacher;

    public void SetMsgDispacher(ChatMsgDispacher msgDispacher)
    {
        _msgDispacher = msgDispacher;
        _msgDispacher.MessageUpdate += MsgDispacher_MessageUpdate;
    }

    void MsgDispacher_MessageUpdate(string msg)
    {
        //add the msg in the child view
    }

    private void button_enviar_Click(object sender, RoutedEventArgs e)
    {
        string chatMessage = textBox_chat.Text;
        _msgDispacher.Update(chatMessage);
    }
}

Answer 3

我会这样做:

public partial class ChatWindow : Window
{

    private Client client;
    public ChatWindow(Client _client)
    {
        InitializeComponent();
        client = _client;
        this.Title = client.Name + " chat";
        client.MessageReceived += OnMessageReceived;


        this.Loaded += OnLoaded;
    }

    public void OnMessageReceived(object sender, MessageReceivedArgs e)
    {
        chatControl.Text += e.Sender.Name+": "+ e.Message;
    }

    private void OnLoaded(object sender, EventArgs e)
    {
        client.Send("client " + client.Name + " is loaded!");
    }


}


public class Client{

    public string Name { get; set; }
    public Chat chat{get;set;}



    public Client(string name)
    {
        Name = name;
    }

    public delegate void MessageReceivedEventHandler(object sender, MessageReceivedArgs e);

    public event MessageReceivedEventHandler MessageReceived;

    private void RaiseMessageReceivedEvent(Client sender, string message)
    {
        MessageReceivedArgs e = new MessageReceivedArgs(sender,message);
        if (MessageReceived != null)
            MessageReceived(this, e);
    }

    public void MessageReceivedFromChat(Client sender,string message)
    {
        RaiseMessageReceivedEvent(sender,message);
    }

    public void Send(string message)
    {
        chat.SendMessage(this, message);
    }




}

public class MessageReceivedArgs : EventArgs
{
    public string Message { get; set; }
    public Client Sender { get; set; }
    public MessageReceivedArgs(Client sender,string message)
    {
        Message = message;
        Sender = sender;
    }
}


public class Chat
{
    private List<Client> clients;

    public Chat()
    {
        clients = new List<Client>();
    }

    public void AddClient(Client client)
    {
        client.chat = this;
        clients.Add(client);
    }

    public void RemoveClient(Client client)
    {
        client.chat = null;
        clients.Remove(client);
    }

    public void SendMessage(Client sender, string message)
    {
        foreach(Client client in clients){
            if (client != sender)
            {
                client.MessageReceivedFromChat(sender, message);
            }

        }
    }

}

创建对象：

        Chat chat = new Chat();
        Client jacques = new Client("jacques");
        Client Pierre = new Client("Pierre");
        chat.AddClient(jacques);
        chat.AddClient(Pierre);

        ChatWindow cw = new ChatWindow(jacques);
        cw.Show();
        ChatWindow cw1 = new ChatWindow(Pierre);
        cw1.Show();

在 2 wpf windows 之间发送信息

Send information between 2 wpf windows

c#

wpf

chat

active-window