Using system;
Using system. drawing;
Using system. collections;
Using system. componentmodel;
Using system. Windows. forms;
Using system. Data;
Using system. net;
Using system. net. Sockets;
Using system. text;
Using system. Threading; Namespace myqq
{
/// <Summary>
/// Summary of form1.
/// </Summary>
Public class form1: system. Windows. Forms. Form
{
Public bool runing = false; // flag
Public udpclient Listen = new udpclient (2525 );
Public ipendpoint end;
Public IPaddress groupaddress = IPaddress. parse ("broadcast 255.255"); // broadcast address
Public int groupport = 2525; // broadcast Port
Public String machinename;
Public String machineip;
Public String romename;
Public String romeip;
Public String romecon;
Private system. Windows. Forms. ListBox box;
Private system. Windows. Forms. Label label1;
Private system. Windows. Forms. Label label2;
Private system. Windows. Forms. Button button1;
Private system. Windows. Forms. Button button3;
Private system. Windows. Forms. Label label3;
Private system. Windows. Forms. textbox t_rec;
Private system. Windows. Forms. textbox t_send;
Private system. Windows. Forms. Button button2;
Private system. Windows. Forms. Button newmsg;
/// <Summary>
/// Required designer variables.
/// </Summary>
Private system. componentmodel. Container components = NULL; Public form1 ()
{
//
// Required for Windows Form Designer support
//
Initializecomponent (); //
// Todo: add Any constructor code after initializecomponent calls
//
} /// <Summary>
/// Clear all resources in use.
/// </Summary>
Protected override void dispose (bool disposing)
{
If (disposing)
{
If (components! = NULL)
{
Components. Dispose ();
}
}
Base. Dispose (disposing );
} # Region code generated by Windows Form Designer
/// <Summary>
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
/// </Summary>
Private void initializecomponent ()
{
This. Box = new system. Windows. Forms. ListBox ();
This. t_rec = new system. Windows. Forms. Textbox ();
This. label1 = new system. Windows. Forms. Label ();
This. label2 = new system. Windows. Forms. Label ();
This. t_send = new system. Windows. Forms. Textbox ();
This. button1 = new system. Windows. Forms. Button ();
This. button3 = new system. Windows. Forms. Button ();
This. label3 = new system. Windows. Forms. Label ();
This. button2 = new system. Windows. Forms. Button ();
This. newmsg = new system. Windows. Forms. Button ();
This. suspendlayout ();
//
// Box
//
This. Box. itemheight = 12;
This. Box. Location = new system. Drawing. Point (0, 32 );
This. Box. Name = "box ";
This. Box. size = new system. Drawing. Size (200,352 );
This. Box. tabindex = 0;
//
// T_rec
//
This. t_rec.backcolor = system. Drawing. systemcolors. inactiveborder;
This. t_rec.forecolor = system. drawing. color. fromargb (system. byte) (192), (system. byte) (64), (system. byte) (0 )));
This. t_rec.location = new system. Drawing. Point (208, 56 );
This. t_rec.multiline = true;
This. t_rec.name = "t_rec ";
This. t_rec.scrollbars = system. Windows. Forms. scrollbars. vertical;
This. t_rec.size = new system. Drawing. Size (328,136 );
This. t_rec.tabindex = 1;
This. t_rec.text = "";
//
// Label1
//
This. label1.location = new system. Drawing. Point (208, 40 );
This. label1.name = "label1 ";
This. label1.size = new system. Drawing. Size (120, 16 );
This. label1.tabindex = 2;
This. label1.text = "receive :";
//
// Label2
//
This. label2.location = new system. Drawing. Point (208,200 );
This. label2.name = "label2 ";
This. label2.size = new system. Drawing. Size (120, 16 );
This. label2.tabindex = 2;
This. label2.text = "Send :";
//
// T_send
//
This. t_send.location = new system. Drawing. Point (208,216 );
This. t_send.multiline = true;
This. t_send.name = "t_send ";
This. t_send.scrollbars = system. Windows. Forms. scrollbars. vertical;
This. t_send.size = new system. Drawing. Size (328,112 );
This. t_send.tabindex = 1;
This. t_send.text = "";
//
// Button1
//
This. button1.location = new system. Drawing. Point (440,344 );
This. button1.name = "button1 ";
This. button1.size = new system. Drawing. Size (75, 32 );
This. button1.tabindex = 3;
This. button1.text = "sending ";
This. button1.click + = new system. eventhandler (this. button#click );
//
// Button3
//
This. button3.flatstyle = system. Windows. Forms. flatstyle. Popup;
This. button3.location = new system. Drawing. Point (88, 3 );
This. button3.name = "button3 ";
This. button3.size = new system. Drawing. Size (56, 23 );
This. button3.tabindex = 4;
This. button3.text = "refresh ";
This. button3.click + = new system. eventhandler (this. button3_click );
//
// Label3
//
This. label3.font = new system. drawing. font ("", 9f, system. drawing. fontstyle. regular, system. drawing. graphicsunit. point, (system. byte) (134 )));
This. label3.forecolor = system. Drawing. color. blue;
This. label3.location = new system. Drawing. Point (8, 8 );
This. label3.name = "label3 ";
This. label3.size = new system. Drawing. Size (80, 16 );
This. label3.tabindex = 5;
This. label3.text = "online user :";
//
// Button2
//
This. button2.location = new system. Drawing. Point (360,344 );
This. button2.name = "button2 ";
This. button2.size = new system. Drawing. Size (75, 32 );
This. button2.tabindex = 6;
This. button2.text = "empty ";
This. button2.click + = new system. eventhandler (this. button2_click );
//
// Newmsg
//
This. newmsg. Location = new system. Drawing. Point (208, 56 );
This. newmsg. Name = "newmsg ";
This. newmsg. size = new system. Drawing. Size (328,136 );
This. newmsg. tabindex = 7;
This. newmsg. Text = "there is a new message! ";
This. newmsg. Click + = new system. eventhandler (this. newmsg_click );
//
// Form1
//
This. autoscalebasesize = new system. Drawing. Size (6, 14 );
This. clientsize = new system. Drawing. Size (544,389 );
This. Controls. Add (this. button2 );
This. Controls. Add (this. label3 );
This. Controls. Add (this. button3 );
This. Controls. Add (this. button1 );
This. Controls. Add (this. label1 );
This. Controls. Add (this. Box );
This. Controls. Add (this. label2 );
This. Controls. Add (this. t_send );
This. Controls. Add (this. t_rec );
This. Controls. Add (this. newmsg );
This. Name = "form1 ";
This. Text = "y ";
This. Closing + = new system. componentmodel. canceleventhandler (this. form1_closing );
This. Load + = new system. eventhandler (this. form#load );
This. resumelayout (false ); }
# Endregion /// <Summary>
/// Main entry point of the application.
/// </Summary>
[Stathread]
Static void main ()
{
Application. Run (New form1 ());
} Private void form1_load (Object sender, system. eventargs E)
{
End = new ipendpoint (groupaddress, groupport );
// Initialize the computer name and port
Iphostentry myentry = DNS. gethostbyname (DNS. gethostname ());
IPaddress myaddress = new IPaddress (myentry. Addresslist [0]. Address );
Machinename = DNS. gethostname ();
Machineip = myaddress. tostring (); Box. Items. Add ("IP host name "); // Enable the listening thread
Runing = true;
Thread mythread = new thread (New threadstart (this. listenport ));
Mythread. Start (); // Send online information
String sends = "0 &" + machineip + "&" + machinename + "&" + machineip;
Sendpack (sends );
} // Listen to the UDP packet of the broadcast address on the specified port
Public void listenport ()
{
Ipendpoint tempend = new ipendpoint (ipaddresses. Any, 2525 );
While (runing)
{
Application. doevents ();
Try
{
Byte [] recb = listen. Receive (ref tempend ); // Check the received information
Checkmessage (recb );
}
Catch (exception E)
{
MessageBox. Show (E. Message. tostring ());
Break;
}
}
Listen. Close ();
Box. Items. Add ("the thread has exited! ");
Runing = false;
} // Receive packets cyclically
Public void checkmessage (byte [] recbb)
{
String recstr = encoding. Default. getstring (recbb );
String [] rec = recstr. Split ('&');
Switch (REC [0])
{
Case "0": // refresh
If (REC [3] = machineip)
{
If (box. findstring (REC [1] + "" + rec [2]) <= 0)
Box. Items. Add (REC [1] + "" + rec [2]);
}
Else if (REC [1] = rec [3])
{
// Refresh request sent from another machine
// Return your own information
String sendstr = "0 &" + machineip + "&" + machinename + "&" + rec [3];
This. sendpack (sendstr );
// Add the user if the user does not exist
If (box. findstring (REC [1] + "" + rec [2]) <= 0)
Box. Items. Add (REC [1] + "" + rec [2]);
}
Break;
Case "1": // speak
If (REC [3] = machineip)
{
Romename = rec [2];
Romeip = rec [1];
Romecon = rec [4];
Showne ();
}
Break;
Case "2": // upload a file
Break;
Case "9": // confirm the package
If (REC [3] = machineip)
MessageBox. Show ("information from: REC [2] (" + rec [1] + ") \ r \ n" + rec [4], "message ");
Break;
}
}
// Send data packets to the broadcast address
Public void sendpack (string sendstr)
{
Byte [] sendb = encoding. Default. getbytes (sendstr );
Try
{
Listen. Send (sendb, sendb. length, end );
}
Catch (exception E)
{
MessageBox. Show (E. Message. tostring ());
}
} // Refresh
Private void button3_click (Object sender, system. eventargs E)
{
Box. Items. Clear ();
Box. Items. Add ("IP host name ");
String temp2 = "0 &" + machineip + "&" + machinename + "&" + machineip;
This. sendpack (temp2 );
} // Close the loop
Private void form1_closing (Object sender, system. componentmodel. canceleventargs E)
{
Runing = false;
Udpclient Mm = new udpclient ();
Ipendpoint tempipend = new ipendpoint (IPaddress. parse ("127.0.0.1"), 2525 );
String temps = "0 & 0 & 0 & 0 & 0 ";
Byte [] sendb = encoding. Default. getbytes (temps );
Mm. Send (sendb, sendb. length, tempipend );
}
// Send
Private void button#click (Object sender, system. eventargs E)
{
If (t_send.text = "")
{
MessageBox. Show ("Empty message cannot be sent! ");
Return;
}
If (box. selecteditem = NULL | box. selectedindex = 0)
{
MessageBox. Show ("select a user first! ");
Return;
}
String send = "1 &" + machineip + "&" + machinename + "&" + box. selecteditem. tostring (). split ('') [0] +" & "+ t_send.text;
This. sendpack (send );
}
// Clear
Private void button2_click (Object sender, system. eventargs E)
{
T_send.text = string. empty;
T_rec.text = string. empty;
}
// Click Show received information and hide itself
Private void newmsg_click (Object sender, system. eventargs E)
{
T_rec.text = "Message from" + romename + "(" + romeip + ")" + datetime. Now. to1_datestring ();
T_rec.text + = "\ r \ n>" + romecon;
String back = "9 &" + machineip + "&" + machinename + "&" + romeip + "& information enabled! ";
This. sendpack (back );
Newmsg. sendtoback (); }
// Display the prompt button when there is information
Public void showne ()
{
// Form display
If (this. windowstate! = Formwindowstate. Normal)
{
This. Visible = true;
This. windowstate = formwindowstate. normal;
}
Newmsg. bringtofront ();
}
}
} |
