C#当出现新数据时，如何更新或刷新函数？

Question

我正在做一个小程序，让我的生活在工作中更轻松。它查找用户名、主机名、MAC地址和IP地址。

当用户将鼠标悬停在系统托盘图标上时，将出现一个工具提示，其中包含所有信息。到目前为止，它工作得很好，除了当一个新的网络连接出现时，它将不会获得IP。

在它获得新的IP地址之前，我必须关闭程序并重新打开它。我该怎么做才能让它在不重新启动应用程序的情况下获取新检测到的网络连接的IP地址。

我不认为我想要定时刷新，它可能会占用太多资源。我把肉和土豆包括在我的申请中。

class ProcessIcon : IDisposable
{
    /// <summary>
    /// The NotifyIcon object.
    /// </summary>
    NotifyIcon ni;

    /// <summary>
    /// Initializes a new instance of the <see cref="ProcessIcon"/> class.
    /// </summary>
    // Instantiate the NotifyIcon object.
    public ProcessIcon()
    {
        ni = new NotifyIcon();
    }

    //Get DNS of computer
    public static string GetDNS()
    {
        String strHostName = string.Empty;
        strHostName = Dns.GetHostName();
        return strHostName;
    }

    //Get IP Address(s) of computer
    static public string GetIP()
    {
        string strReturn = string.Empty;

        //This gets the computers DNS
        String strHostName = string.Empty;
        strHostName = Dns.GetHostName();

        // Then using host name, get the IP address list..
        IPHostEntry ipEntry = Dns.GetHostEntry(strHostName);
        IPAddress[] addr = ipEntry.AddressList;

        List<string> lstIP = new List<string>();

        for (int i = 0; i < addr.Length; i++)
        {
            if (addr[i].AddressFamily == AddressFamily.InterNetworkV6)
            {
                    //DO NOTHING. This If statements checks for IPV6 addresses and excludes them from the output.
            }
            else
            {
                //This if statement checks if the address is a IPV4 and if it is, it adds it to the string.
                if (addr[i].AddressFamily == AddressFamily.InterNetwork)
                {
                    strReturn += (addr[i].ToString() + "\t");
                }
                else
                {
                        //Nothing for now
                }
            }                
        }     
        return strReturn;
    }

    //Gets the computers MAC address for ethernet
    public static string getMAC()
    {
        string macAddresses = "";
        foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
        {
        // Only consider Ethernet network interfaces, thereby ignoring any
        // loopback devices etc.
        if (nic.NetworkInterfaceType != NetworkInterfaceType.Ethernet) continue;
            if (nic.OperationalStatus == OperationalStatus.Up)
            {
                macAddresses += nic.GetPhysicalAddress().ToString();
                break;
            }
        }
        return macAddresses;    
    }

    public static string GetUSER()
    {
        string username = System.Security.Principal.WindowsIdentity.GetCurrent().Name;

        return username;
    }


    //String that combines the DNS,MAC and IP address strings into one that is formatted for easy viewing.
    public static string showALL()
    {
        string showALL = "User: " + GetUSER() + Environment.NewLine + "DNS: " + GetDNS() + Environment.NewLine + "MAC: " + getMAC() + Environment.NewLine + "IP: " + GetIP();
        return showALL;
    }

    /// <summary>
    /// Displays the icon in the system tray.
    /// </summary>
    public void Display()
    {
        // Put the icon in the system tray and allow it react to mouse clicks.          
        ni.MouseClick += new MouseEventHandler(ni_MouseClick1);
        ni.Icon = Resources.SystemTrayApp;
        Fixes.SetNotifyIconText(ni,showALL());
        ni.Visible = true;

        // Attach a context menu.
        ni.ContextMenuStrip = new ContextMenus().Create();
    }

    private void ni_MouseClick(object sender, MouseEventArgs e)
    {
        throw new NotImplementedException();
    }

    /// <summary>
    /// Releases unmanaged and - optionally - managed resources
    /// </summary>

    // When the application closes, this will remove the icon from the system tray immediately.
    public void Dispose()
    {
        ni.Dispose();
    }

    /// <summary>
    /// Handles the MouseClick event of the ni control.
    /// </summary>
    /// <param name="sender">The source of the event.</param>
    /// <param name="e">The <see cref="System.Windows.Forms.MouseEventArgs"/> instance containing the event data.</param>
    void ni_MouseClick1 (object sender, MouseEventArgs e)
    {
        // Handle mouse button clicks.
        if (e.Button == MouseButtons.Left)
        {

        Form1 form1 = new Form1();

        form1.Text = "Whats my IP";
        form1.Show();
        form1.ShowInTaskbar = false;
        }
    }

Answer 1

您可以添加事件NetworkChange.NetworkAddressChanged并采取操作来更新数据，例如：

        static void Main(string[] args) 
        { 
              try 
              { 
                    NetworkChange.NetworkAddressChanged += new NetworkAddressChangedEventHandler(NetworkChange_NetworkAddressChanged); 
                    Console.ReadLine(); 
              } 
              catch (Exception e) 
              { 
                    Console.WriteLine(e); 
              } 
        } 

        static void NetworkChange_NetworkAddressChanged(object sender, EventArgs e) 
        { 
              Console.WriteLine(" do Something"); 
        }

Answer 2

您可以在数据发生更改时广播信号，并向侦听该广播的侦听器注册您的函数。registerReceiver可以用于以后和广播信号，它们应该是C#中的一些功能，就像安卓中的Intent一样。