c# 窗体聊天 udp-C# 无法触发窗口弹出 show方法不生效

问题描述

C# 无法触发窗口弹出 show方法不生效

要做一个基于UDP的群聊加私聊程序，群聊已经实现了，私聊也已经单独实现了，但是我想让着两个窗体有联系，就想QQ一样，PC1发消息的时候,PC2 自动弹出消息窗口。

登录窗体：
using System.Net;

namespace NetMeetingExample
{

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

    private void Login_Load(object sender, EventArgs e)
    {
        this.textBox1.Text = Dns.GetHostName().ToString();

    }
    public static string nicheng;
    public static string group;
    private void button1_Click(object sender, EventArgs e)
    {
        nicheng = textBox1.Text;
        group =comboBox1.Text;
        //this.Opacity = 0;     

        this.DialogResult = DialogResult.OK;
    }

    private void button2_Click(object sender, EventArgs e)
    {
        this.DialogResult = DialogResult.Cancel;
    }
}

}

群聊窗体：

using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace NetMeetingExample
{
public partial class FormMeeting : Form
{
private enum ListBoxOperation { AddItem, RemoveItem };
private delegate void SetListBoxItemCallback(
ListBox listbox, string text, ListBoxOperation operation);
SetListBoxItemCallback listBoxCallback;
//使用的IP地址

    private IPAddress broderCastIp = IPAddress.Parse("224.100.0.1");
    //使用的接收端口号
    public static int port = 8001;
    private UdpClient udpClient;
    public FormMeeting()
    {
        if (FormLogin.group=="101021")
{
    broderCastIp = IPAddress.Parse("224.100.0.1");
}
        if (FormLogin.group == "101022")
        {
            broderCastIp = IPAddress.Parse("224.100.0.2");
        }
        if (FormLogin.group == "101023")
        {
            broderCastIp = IPAddress.Parse("224.100.0.3");
        }
        if (FormLogin.group == "101024")
        {
            broderCastIp = IPAddress.Parse("224.100.0.4");
        }
        InitializeComponent();
        listBoxCallback = new SetListBoxItemCallback(SetListBoxItem);
        this.Text = FormLogin.group;
    }
    private void SetListBoxItem(ListBox listbox, string text, ListBoxOperation operation)
    {
      string[]   cc;//= splitString[1].Split('@');
        if (listbox.InvokeRequired == true)
        {
            this.Invoke(listBoxCallback, listbox, text, operation);
        }
        else
        {
            if (operation == ListBoxOperation.AddItem)
            {
                if (listbox == listBoxAddress)
                {
                    if (listbox.Items.Contains(text) == false)
                        if (text != "")
                        {

                            {    cc=text.Split('@');
                    string oo = cc[0];
                        listBoxMessage.Items.Add(oo+"进入。");
                                listbox.Items.Add(text);
                            }
                        }
                }
                else
                {
                    if (text != "[]进入。")
                    {

                        listbox.Items.Add(text); 

                   //   SetListBoxItem(listBoxMessage,
                      //      string.Format("[{0}]进入。",cc[0]), ListBoxOperation.AddItem);

                    }
                }
                listbox.SelectedIndex = listbox.Items.Count - 1;
                listbox.ClearSelected();
            }
            else if (operation == ListBoxOperation.RemoveItem)
            {
                cc = text.Split('@');
              //  SetListBoxItem(listBoxMessage,
                 //     string.Format("[{0}]退出。", cc[0]), ListBoxOperation.AddItem);
               //
            //    listBoxMessage.Items.Add(string.Format("[{0}]退出。", cc[0]));
                string oo = cc[0];
                listBoxMessage.Items.Add(oo+"退出。");

                listbox.Items.Remove(text);
            }
        }
    }
    public  static void SendMessage(IPAddress ip, string sendString)
    {
        UdpClient myUdpClient = new UdpClient();
        //允许发送和接收广播数据报
       // myUdpClient.EnableBroadcast = true;
        //必须使用组播地址范围内的地址
        IPEndPoint iep = new IPEndPoint(ip, port);
        //将发送内容转换为字节数组
        byte[] bytes = System.Text.Encoding.UTF8.GetBytes(sendString);
        try
        {
            //向子网发送信息
            myUdpClient.Send(bytes, bytes.Length, iep);
        }
        catch (Exception err)
        {
            MessageBox.Show(err.Message, "发送失败");
        }
        finally
        {
            myUdpClient.Close();
        }
    }
    public static IPAddress ipp;
    private void FormMeeting_Load(object sender, EventArgs e)
    {
        listBoxMessage.HorizontalScrollbar = true;
        buttonLogin.Enabled = true;
        buttonLogout.Enabled = false;
        groupBoxRoom.Enabled = false;

        IPAddress[] iph = Dns.GetHostAddresses(Dns.GetHostName());
        ipp = iph[iph.Length-2];

    }
    /// <summary>
    /// 接收线程
    /// </summary>
    private void ReceiveMessage()
    {
        udpClient = new UdpClient(port);
        //必须使用组播地址范围内的地址
        udpClient.JoinMulticastGroup(broderCastIp);
        udpClient.Ttl = 50;
        IPEndPoint remote = null;
        while (true)
        {
            try
            {
                //关闭udpClient时此句会产生异常
                byte[] bytes = udpClient.Receive(ref remote);
                string str = Encoding.UTF8.GetString(bytes, 0, bytes.Length);
                string[] splitString = str.Split(',');
                int s = splitString[0].Length;
                //string[] splithostname;
               // splithostname= splitString[1].Split('@');
                string[] mhost;
                mhost = splitString[1].Split('@');
                switch (splitString[0])
                {
                    case "Login":  //进入会议室      

                     //   SetListBoxItem(listBoxMessage,
                         //   string.Format("[{0}]进入。", splithostname[0]), ListBoxOperation.AddItem);

                        SetListBoxItem(listBoxAddress,
                        splitString[1], ListBoxOperation.AddItem);

                        string userListString = "List," ;
                        for (int i = 0; i < listBoxAddress.Items.Count; i++)
                        {
                            userListString += "," + listBoxAddress.Items[i].ToString();

                        }
                        SendMessage(remote.Address, userListString);

                        break;
                    case "List": //参加会议人员名单
                        for (int i = 1; i < splitString.Length; i++)
                        {
                            SetListBoxItem(listBoxAddress,
                                splitString[i], ListBoxOperation.AddItem);
                        //  SetListBoxItem(listBoxMessage,
                        //   string.Format("[{0}]进入。", splithostname[0]), ListBoxOperation.AddItem);

                        }
                        break;
                    case "Message":  //发言内容
                        SetListBoxItem(listBoxMessage,
                            string.Format("[{0}]说：{1}", mhost[0], mhost[1]),
                            ListBoxOperation.AddItem);
                        break;
                    case "Logout": //退出会议室
                     //   SetListBoxItem(listBoxMessage,
                      //      string.Format("[{0}]退出。", FormLogin.nicheng),
                     //       ListBoxOperation.AddItem);

                       // SetListBoxItem(listBoxMessage,
                       //   string.Format("[{0}]退出。", splithostname[0]), ListBoxOperation.AddItem);

                        SetListBoxItem(listBoxAddress,
                            FormLogin.nicheng + "@" + remote.Address.ToString(), ListBoxOperation.RemoveItem);
                        break;
                    case "mi": 

                        FormChat fc = new FormChat();
                        fc.Owner = this;
                        fc.Show();
                       // MessageBox.Show("sfs");
                        break;
                }
            }
            catch
            {
                //退出循环，结束线程
                break;
            }
        }
    }

    private void textBoxMessage_KeyPress(object sender, KeyPressEventArgs e)
    {
        if (e.KeyChar == (char)Keys.Return)
        {
            if (textBoxMessage.Text.Trim().Length > 0)
            {
                SendMessage(broderCastIp, "Message," + FormLogin.nicheng+"@"+ textBoxMessage.Text);
                textBoxMessage.Text = "";
            }
        }
    }
    //窗体已关闭并指定关闭原因前触发的事件
    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        if (buttonLogout.Enabled == true)
        {
            MessageBox.Show("请先离开会议室，然后再退出！", "",
                MessageBoxButtons.OK, MessageBoxIcon.Warning);
            //不关闭窗体
            e.Cancel = true;
        }
    }
    //单击进入会议室按钮触发的事件
    private void buttonLogin_Click(object sender, EventArgs e)
    {
        Cursor.Current = Cursors.WaitCursor;
        Thread myThread = new Thread(ReceiveMessage);
        myThread.Start();
        //等待接收线程准备完毕
        Thread.Sleep(1000);
        SendMessage(broderCastIp, "Login,");
        buttonLogin.Enabled = false;
        buttonLogout.Enabled = true;
        groupBoxRoom.Enabled = true;

      //  SetListBoxItem(listBoxMessage,
        //                  string.Format("[{0}]进入。", FormLogin.nicheng), ListBoxOperation.AddItem);

        SetListBoxItem(listBoxAddress,
                       FormLogin.nicheng + "@" +ipp.ToString(), ListBoxOperation.AddItem);

        string userListString = "List," + FormLogin.nicheng + "@" + ipp.ToString();

        SendMessage(broderCastIp , userListString);

        Cursor.Current = Cursors.Default;
    }
    //单击退出会议室按钮触发的事件
    private void buttonLogout_Click(object sender, EventArgs e)
    {
        Cursor.Current = Cursors.WaitCursor;
        SendMessage(broderCastIp, "Logout,");
        udpClient.DropMulticastGroup(this.broderCastIp);
        //等待接收线程处理完毕
        Thread.Sleep(1000);
        //结束接收线程
        udpClient.Close();
        buttonLogin.Enabled = true;
        buttonLogout.Enabled = false;
        groupBoxRoom.Enabled = false;
        Cursor.Current = Cursors.Default;
    }

    private void button1_Click(object sender, EventArgs e)
    {
       // string add = "sdfsdf-192.168.22.3";
        //string[] omg = add.Split('@');
       // MessageBox.Show(omg[1].ToString());
        //FormChat FC = new FormChat();
       // FC.Owner = this;
      //  FC.Show();
    }
    public static string[] omg;
    private void listBoxAddress_MouseDoubleClick(object sender, MouseEventArgs e)
    {

        string add = listBoxAddress.SelectedItem.ToString();

           omg = add.Split('@');

        FormChat fc = new FormChat();
        fc.Owner = this;
        fc.Show();

    }

}

}

私聊窗体

using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace NetMeetingExample
{
public partial class FormChat : Form
{

    /// <summary>接收用</summary>
    private UdpClient receiveUdpClient;
    /// <summary>发送用</summary>
    private UdpClient sendUdpClient;
    /// <summary>和本机绑定的端口号</summary>
    private const int port = 18001;
    /// <summary>本机IP</summary>
    IPAddress ip;
    /// <summary>远程主机IP</summary>
    IPAddress remoteIp;

    public FormChat()
    {
        InitializeComponent();
        IPAddress[] ips = Dns.GetHostAddresses(Dns.GetHostName());
        ip = ips[ips.Length - 1];
        //为了在同一台机器调试，此IP也作为默认远程IP
       // remoteIp = ip;
        remoteIp = IPAddress.Parse(FormMeeting.omg[1]);
        textBoxRemoteIP.Text = FormMeeting.omg[1];

        textBoxSend.Text = "你好！";

    }

    private void buttonSend_Click(object sender, EventArgs e)
    {
        Thread t = new Thread(SendMessage);
        t.IsBackground = true;
        t.Start(textBoxSend.Text);
    }

    private void FormChat_Load(object sender, EventArgs e)
    {
        //创建一个线程接收远程主机发来的信息
        Thread myThread = new Thread(ReceiveData);
        //将线程设为后台运行
        myThread.IsBackground = true;
        myThread.Start();
        textBoxSend.Focus();
    }
    private void SendMessage(object obj)
    {
        string message = (string)obj;
        sendUdpClient = new UdpClient(0);
        byte[] bytes = System.Text.Encoding.Unicode.GetBytes(message);
        IPEndPoint iep = new IPEndPoint(remoteIp, port);
        try
        {
            sendUdpClient.Send(bytes, bytes.Length, iep);
            AddItem(listBoxStatus, string.Format("向{0}发送：{1}", iep, message));
            ClearTextBox();
        }
        catch (Exception ex)
        {
            AddItem(listBoxStatus, "发送出错:" + ex.Message);
        }
    }

    private void ReceiveData()
    {
        IPEndPoint local = new IPEndPoint(ip, port);
        receiveUdpClient = new UdpClient(local);
        IPEndPoint remote = new IPEndPoint(IPAddress.Any, 0);
        while (true)
        {
            try
            {
                //关闭udpClient时此句会产生异常
                byte[] receiveBytes = receiveUdpClient.Receive(ref remote);
                string receiveMessage = Encoding.Unicode.GetString(
                    receiveBytes, 0, receiveBytes.Length);
                AddItem(listBoxReceive, string.Format("来自{0}：{1}", remote, receiveMessage));
            }
            catch
            {
                break;
            }
        }
    }

    delegate void AddListBoxItemDelegate(ListBox listbox, string text);
    private void AddItem(ListBox listbox, string text)
    {
        if (listbox.InvokeRequired)
        {
            AddListBoxItemDelegate d = AddItem;
            listbox.Invoke(d, new object[] { listbox, text });
        }
        else
        {
            listbox.Items.Add(text);
            listbox.SelectedIndex = listbox.Items.Count - 1;
            listbox.ClearSelected();
        }
    }
    delegate void ClearTextBoxDelegate();
    private void ClearTextBox()
    {
        if (textBoxSend.InvokeRequired)
        {
            ClearTextBoxDelegate d = ClearTextBox;
            textBoxSend.Invoke(d);
        }
        else
        {
            textBoxSend.Clear();
            textBoxSend.Focus();
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        FormMeeting.SendMessage(remoteIp, "mi," + "hello~");
       // SendMessage(broderCastIp, "Message," + textBoxMessage.Text);
    }

}

}

Program.cs

static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);

        FormLogin fl = new FormLogin();
        if (fl.ShowDialog() == DialogResult.OK)
        {
            Application.Run(new FormMeeting());
        }
        else
        {
            Application.Exit();
        }

在私聊窗体里单击BUTTON1会向对端发送“mi”命令从而触发对端的窗体弹出，函数能进去，但窗体就是不弹出，另外将弹出写在button_click下，然后在mi下执行button的_click事件也不能触发，，但是单独单击却能打开，函数是能进来的

求高人解决。。。。。。。。。。

时间： 2024-10-02 16:02:17

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