[C # source code] determines whether the network is connected.

Method 1:

 Using  System;  Using  System. Collections. Generic;  Using  System. componentmodel;  Using  System. Data;  Using  System. drawing;  Using  System. LINQ;  Using  System. text;  Using System. Windows. forms;  Using  System. net. networkinformation;  Namespace  Windowsformsapplication1 {  Public   Partial   Class  Form1: FORM {  Public  Form1 () {initializecomponent ();}  Private   Void Form1_load ( Object Sender, eventargs e) {ping = New  Ping (); pingreply re = A. Send ( "  202.96.134.134  " ); //  Ping Return Value              If (Re. Status = ipstatus. Success) //  If Ping is successful  {Label1.text = " Internet connection successful ..  "  ; Label1.forecolor = Color. Green ;}  Else  {Label1.text = "  An error occurred while connecting to the Internet.  "  ; Label1.forecolor = Color. Red ;}}}} 

 

Method 2:

 Using  System; Using  System. runtime. interopservices;  Namespace  Network_status {  Class  Program {[dllimport (  "  Wininet. dll  " , Entrypoint = "  Internetgetconnectedstate  "  )]  Public   Extern  Static   Bool Internetgetconnectedstate ( Out   Int Constate, Int  Reder );  //  Parameter description constate connection description, reder reserved value           Public   Static   Bool  Isconnectedtointernet (){  Int Desc = 0 ;  Return Internetgetconnectedstate ( Out DESC, 0  );}  Public   Static   Void Main ( String  [] ARGs ){  While ( True  ){  If (Isconnectedtointernet () {console. writeline (  "  Connected to the internet!  "  );  //  Inform me of code ....  }  Else  {Console. writeline (  "  Not connected to the internet!  " );} System. Threading. thread. Sleep (  5000  );}}}} 

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