Program Crashes.

Program Crashes.

• netleon

  Hey Mike, nm I got it working.. I guess Im just a little tired here.. now I feel embarest :S, thanx for your help me.
  
  
  

• Ahoapap

  Hmm... on a quick look the code seems correct. What error are you getting and where

  
  

• Conde_tkd

  But your code already does this. You have the GetHostEntry call in a try block and in the catch you set the checkbox text to the input string.
  

• raaj_001

  The program loads fine.. but when I add a few IP Addresses.. for example an Ip that does not have a domain name.. it crashes.. it starts at line 164 in the pastebin link. Can you run the program and see it for your self I build it using my text editor and compiled it with .Net FrameWork.
  
  
  

• BigWinston

  Ya.. but its not catching it :( its weird.. see.. I even modded abit to see.
  
  string[] strings = list.ToArray();
  
  CheckBox[] chk = new CheckBox[strings.Length];
  
  for( int x = 0; x < strings.Length; x++ )
  {
  if( Regex.IsMatch( strings[x], @"^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$" ) == false )
  {
  MessageBox.Show( "There is an error in your Input" );
  
  }else{
  
  if( strings[x] != null )
  {
  try {
  
  this.Cursor = Cursors.WaitCursor;
  
  IPHostEntry ipHostEntry = Dns.GetHostEntry( strings[x].ToString());
  
  chk[x] = new CheckBox();
  chk[x].Location = new Point( 10, 30 * x );
  chk[x].Size = new Size( 350, 40 );
  chk[x].Text = ipHostEntry.HostName;
  
  pnl2.Controls.Add( chk[x] );
  
  }catch( Exception exc ) {
  
  MessageBox.Show( exc.Message, "TestDNS", MessageBoxButtons.OK, MessageBoxIcon.Exclamation );
  
  }finally {
  
  this.Cursor = Cursor;
  }
  }
  }
  
  I keep getting the same debugging box as before... just with a different message. but shouldnt the try/catch work
  
  
  

• Joeku

  hhm I see another error.. but its because Im adding an unknown host in the box.. what would be the best way for me to catch this and just pring out the ip
  
  
  

• Mike Sage

  hm thats weird.. I dont see were I set the chk array to 10... this is what I have..
  
  string[] strings = list.ToArray();
  
  for( int x = 0; x < strings.Length; x++ )
  {
  if( strings[x] != "" && strings[x] != null )
  {
  try {
  
  IPHostEntry ipHostEntry = Dns.GetHostEntry( strings[x].ToString());
  chk[x] = new CheckBox();
  chk[x].Location = new Point( 10, 30 * x );
  chk[x].Size = new Size( 350, 40 );
  
  foreach(IPAddress ipAddress in ipHostEntry.AddressList)
  {
  chk[x].Text = ipHostEntry.HostName;
  }
  }catch( Exception e ) {
  
  chk[x].Text = strings[x];
  }
  
  pnl2.Controls.Add( chk[x] );
  }
  }
  
  
  ------- edit --------
  
  Oh I see.. ok Will try it out.
  
  
  

• Kev Wu

  RizwanSharp wrote:

  Same here as Mike Said, I also ran it and provided some IP Addressses and did not have any crash!!! Secondly I wonder you are using a text editor to write the code and C# Compiler to compile and run..... Its really weird for me to wirte some small application in 10x time all with hand. Why dont you download free C# Express Editon it supprts almost everything a hobbiest developer needs! Please dont wait to get it from here for free: http://msdn.microsoft.com/vstudio/express/visualcsharp/ Best Regards,

  thanx for the recommendations.. but I like doing things raw this way I can learn and know what is going on, also once I learn I will be doing some big apps.. anyways.. I made a snapshot of the error message... you can view it here.. http://dbmsystempr.com/error.gif
  
  
  

• Tonnie

  This is probably in line 165, not 164. Your CheckBox array (chk) is only 10 elements in size. If you specify more than 10 addresses as input you get this error. You need to recreate the chk array to have the same size as the strings array:

  1. string[] strings = list.ToArray();
  2. chk = new CheckBox[strings.Length];
  4. for( int x = 0; x < strings.Length; x++ )

  
  

• Ed209

  Does not crash for me. What error message/exception are you seeing At that line is GetHostEntry that can throw various exceptions like "unknown host" or similar.
  

• Alvin Kuiper

  Same here as Mike Said,

  I also ran it and provided some IP Addressses and did not have any crash!!!

  Secondly I wonder you are using a text editor to write the code and C# Compiler to compile and run..... Its really weird for me to wirte some small application in 10x time all with hand. Why dont you download free C# Express Editon it supprts almost everything a hobbiest developer needs!

  Please dont wait to get it from here for free:

  http://msdn.microsoft.com/vstudio/express/visualcsharp/

  Best Regards,

  
  
  
• Program Crashes.