.NET Tip: Are Your Computers Up and Running? Are You Sure?

There are plenty of utilities to help monitor your computer systems, but what if you need to integrate system status information into your own application? I am in the process of building a system-wide dashboard for my employer. I want to display a simple red/yellow/green light for each computer to indicate its current status. A red light indicates that the computer is unreachable.

How do you normally determine if a computer is available? I normally open up a command prompt and fire off a ping to the computer. Ping is a great utility to determine basic system availability. You could write a script that pings the computer and then parses the reply to determine availability. If you are using .NET, then everything you need to do the same thing in code is only a namespace away. The System.Net.NetworkInformation namespace has what you need to ping a computer directly from your application. It is as simple as a single call using the Ping class.

Ping Pinger = new Ping(); 
PingReply Reply = Pinger.Send(""); 

The above code creates a new instance of the Ping class and then sends a ping to the local machine. It isn't very interesting, but it couldn't be much simpler. Take a look at another example. This time you will start with a list of computers that need to be monitored. The example iterates through each computer in the list, pinging the computer and displaying the results on the console. The list of computers can contain either IP addresses or web sites. For this example I have included a few internal systems as well as a couple web sites you might recognize.

List IPs = new List(); 
Ping Pinger = new Ping(); 
foreach (string ip in IPs) 
    PingReply Reply = Pinger.Send(ip); 
    Console.WriteLine("Ping " + ip + ": " + Reply.Status.ToString()); 

Here is the console output for this example.

Ping Success 
Ping TimedOut 
Ping TimedOut 
Ping www.google.com: Success 
Ping www.amazon.com: TimedOut  

With only a few lines of code you can now determine the status of your computer systems. Whether it is an email, SMS message, or red/yellow/green light, you can be confident that your systems are up and running. The Ping class provides several options that you can use to control the requests as well as the ability to send asynchronous ping requests. Make sure you check out these options as well as all of the information available in the reply from the ping request.


  • Cool tip - weird code casing

    Posted by Efitap on 04/03/2009 12:39am

    A tip back to you: 
    Use camel casing to name variables and parameters.
    Use Pascal casing to name functions and types. 
    List< string > ipNumbers = new  List< string >( );
    ips.Add( "" );
    Ping pinger = new Ping( );
    foreach( string currentIp in ipNumbers )
      PingReply reply = pinger.Send( currentIp );
      Console.WriteLine("Ping " + ipNumber + ": " + reply.Status.ToString());
    Code readability is equally important to it's functionality. 
    The days when one could write unreadable code are numbered - the challenge today is to make it as clear as clear can be :)
    Other than that, great tip, loved it, didn't know about it!

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Enterprises are increasingly looking to platform as a service (PaaS) to lower their costs and speed their time to market for new applications. Developing, deploying, and managing applications in the cloud eliminates the time and expense of managing a physical infrastructure to support them. PaaS offerings must deliver additional long-term benefits, such as a lower total cost of ownership (TCO), rapid scalability, and ease of integration, all while providing robust security and availability. This report …

  • Anthony Christie, the Chief Marketing Officer for Level Communications, is responsible for customer experience, worldwide marketing and product management. In this informative asset, he shares his insights into why a private network connection to cloud-bases applications is the right decision for your enterprise. Download now to find out more.

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date