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Posted 27 Oct 2003


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Wake On Lan sample for C#

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27 Oct 2003
Wake On Lan utility using C#.


It's strange but I failed to find on the Internet any WOL sample written in C#. So I spent some time making a program to that purpose. It's very simple but it works OK (in our intranet at least).

For waking computers, I use Magic Packet (MAC address of network adapter repeated 16 times).

The actual functionality is implemented like this:


using System;
using System.Net.Sockets;

//we derive our class from a standart one
public class WOLClass:UdpClient    
    public WOLClass():base()
    { }
    //this is needed to send broadcast packet
    public void SetClientToBrodcastMode()    
//now use this class
 //MAC_ADDRESS should  look like '013FA049'
 private void WakeFunction(string MAC_ADDRESS)   
      WOLClass client=new WOLClass();
         IPAddress(0xffffffff),  //  i.e broadcast
         0x2fff); // port=12287 let's use this one 
      //set sending bites
      int counter=0;
      //buffer to be send
      byte[] bytes=new byte[1024];   // more than enough :-)
     //first 6 bytes should be 0xFF
     for(int y=0;y<6;y++)
     //now repeate MAC 16 times
     for(int y=0;y<16;y++)
         int i=0;
         for(int z=0;z<6;z++)

     //now send wake up packet
     int reterned_value=client.Send(bytes,1024);


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Comments and Discussions

QuestionNote - you need to adjust Network Adapter power settings Pin
navyjax218-Apr-17 9:21
Membernavyjax218-Apr-17 9:21 
PraiseWorks just fine Pin
Jefferson Motta6-Apr-17 5:33
MemberJefferson Motta6-Apr-17 5:33 
QuestionReturn values from WakeFunction ? Pin
KeldSo7-Feb-16 4:47
MemberKeldSo7-Feb-16 4:47 
GeneralWorks. Pin
Member 154943823-Sep-14 22:57
MemberMember 154943823-Sep-14 22:57 
QuestionNot working on my system.. Pin
Basmeh Awad12-May-13 22:58
professionalBasmeh Awad12-May-13 22:58 
AnswerRe: Not working on my system.. Pin
Jefferson Motta7-Aug-17 5:37
MemberJefferson Motta7-Aug-17 5:37 
GeneralWorks with WOW Pin
David J Rundle15-May-12 4:34
MemberDavid J Rundle15-May-12 4:34 
GeneralThanks! Pin
Anthraxx NL22-Jan-10 10:33
MemberAnthraxx NL22-Jan-10 10:33 
GeneralOther example and some theory Pin
memos-software24-Jun-08 20:31
Membermemos-software24-Jun-08 20:31 
GeneralError Pin
Christian Rasmussen11-Jun-08 3:11
MemberChristian Rasmussen11-Jun-08 3:11 
GeneralRe: Error Pin
Ian_E15-Jun-08 12:35
MemberIan_E15-Jun-08 12:35 
GeneralRe: Error Pin
Randy_Miller12-Jul-08 6:14
MemberRandy_Miller12-Jul-08 6:14 
GeneralThanks! Pin
devcow11-Jun-07 7:16
Memberdevcow11-Jun-07 7:16 
GeneralWorks great ! Pin
A.J.Bauer11-Mar-07 6:32
MemberA.J.Bauer11-Mar-07 6:32 
Generalfor broadcasting Pin
plato2926-Jun-06 22:16
Memberplato2926-Jun-06 22:16 
Generalbroadcasting Pin
plato2926-Jun-06 21:42
Memberplato2926-Jun-06 21:42 
GeneralIP Broadcasting Pin
HakunaMatada27-Dec-05 22:29
MemberHakunaMatada27-Dec-05 22:29 
GeneralThanks for the sample Pin
Radoslav Bielik6-Jan-04 11:05
MemberRadoslav Bielik6-Jan-04 11:05 

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