如何在应用程序打开两次时创建单个实例应用程序的mdi子项？ [英] how to create mdi child of a single instance application when the application is opened twice?

问题描述

请我是C＃的新手，我需要你的帮助。

我创建了一个单实例csharp应用程序，它使用我找到的必要代码使用mdi表单网站上最特别的是 http://www.codeproject.com [ ^ ]。



我的问题是当用户尝试打开/运行应用程序两次或更多时，如何创建新的mdi选项卡或子项？因此，不要像在 C＃中的单实例应用程序中那样显示或设置焦点已打开的应用程序/ a> [ ^ ]，我想创建一个新的mdi标签或子。非常欢迎任何帮助。



单实例功能是从这里获得的 C＃中的单实例应用程序 [ ^ ]



非常感谢

Please I am new in C# and i need your help.
I have created a single instance csharp application that uses mdi forms using the necessary code that i find on the web most especially here at http://www.codeproject.com[^] .

My question is how do I create a new mdi tab or child when a user attempt to open/run the application twice or more? So instead of showing or setting focus to already the opened application as in Single Instance Application in C#[^], I would like to create a new mdi tab or child from. Please any help is greatly welcomed.

The single instance functionality was obtained from here Single Instance Application in C#[^]

Thank you very much

推荐答案

if (!OnlyOneProcess())
            {
[] send = Encoding.UTF8.GetBytes("ExecuteLink=Something");
SendUDP(IPAddress.Loopback, MY_PORT, send, false);
                }

public static bool SendUDP(IPAddress ip, ushort port, byte[] send, bool is_broadcast)
       {
           try
           {
               IPEndPoint groupEP = new IPEndPoint(ip, port);

               UdpClient udp = new UdpClient();
               udp.EnableBroadcast = is_broadcast;
               udp.DontFragment = true;
               udp.Send(send, send.Length, groupEP);
               udp.Close();
               return true;
           }
           catch { }
           return false;
       }

然后在套接字中捕获消息

And capture the message in socket like that

 tudp = LIB.UDPRead(IPUB.PORT, search_udp);

static void search_udp(Socket sender, EndPoint ep, byte[] data, int recv)
        {
            
    string stringData = Encoding.UTF8.GetString(data, 0, recv );
                        
        }

public static Thread UDPRead(ushort port, dOnUDPRead search)
        {
            Socket udp = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            IPEndPoint iep = new IPEndPoint(IPAddress.Any, port);
            udp.Bind(iep);

            Thread h_b = new Thread(new ParameterizedThreadStart(TUDPRead));
            h_b.SetApartmentState(ApartmentState.MTA);
            h_b.Name = "BROADCAST";
            h_b.Priority = ThreadPriority.BelowNormal;
            h_b.IsBackground = true;
            h_b.Start(new object[] { udp, iep, search });

            return h_b;
        }
public delegate void dOnUDPRead(Socket sender, EndPoint e, byte[] data, int count);
        static void TUDPRead(object o)
        {
            object[] ar = (object[])o;
            Socket udp = (Socket)ar[0];
            IPEndPoint iep = (IPEndPoint)ar[1];
            dOnUDPRead ev = (dOnUDPRead)ar[2];

            try
            {
                byte[] data = new byte[20480];
                while (true)
                {
                    EndPoint ep = (EndPoint)iep;

                    int recv = udp.ReceiveFrom(data, ref ep);
                    if (recv <= 0) continue;

                    ev(udp, ep, data, recv);
                    Thread.Sleep(1);
                }
            }
            catch (Exception ex) { LIB.Error(ex, LIB.EError.OnlyLog); }
            finally { if (udp != null) udp.Close(); }
        }

这篇关于如何在应用程序打开两次时创建单个实例应用程序的mdi子项？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！