How to get the up time of the machine?

Question

I would like to display the up time of the machine my code is running, how can I do that?

Answer 1

Try this link. It uses the System.Environment.TickCount property

Gets the number of milliseconds elapsed since the system started. - MSDN

http://msdn.microsoft.com/en-us/library/system.environment.tickcount(VS.80).aspx

Note: this method will work for 25 days because TickCount is an Int32.

Answer 2

using System.Management;
using System.Linq;

TimeSpan GetUptime()
 { var query = new SelectQuery("SELECT LastBootUpTime 
                                 FROM Win32_OperatingSystem 
                                 WHERE Primary='true'");
   var mos = new ManagementObjectSearcher(query);
   var str = mos.Get().First().Properties["LastBootUpTime"].Value.ToString();

   return DateTime.Now - ManagementDateTimeConverter.ToDateTime(str);
 }

(Based on code from http://bytes.com/forum/thread502885.html)

Answer 3

Curious that none of them considered Stopwatch yet?

Precise and bigger than System.Environment.TickCount, not involving OS horrific perf counters, WMI or native calls, and well really simple:

var ticks = Stopwatch.GetTimestamp();
var uptime = ((double)ticks) / Stopwatch.Frequency;
var uptimeSpan = TimeSpan.FromSeconds(uptime);

Answer 4

You can also use Diagnostics

using System.Diagnostics;
..........
PerformanceCounter perfc = new PerformanceCounter("System","System Up Time");
perfc.NextValue();
TimeSpan t = TimeSpan.FromSeconds(perfc.NextValue());
..........

Answer 5

The simplest and proper way to do this is

public static TimeSpan GetUptime()
{
    ManagementObject mo = new ManagementObject(@"\\.\root\cimv2:Win32_OperatingSystem=@");
    DateTime lastBootUp = ManagementDateTimeConverter.ToDateTime(mo["LastBootUpTime"].ToString());
    return DateTime.Now.ToUniversalTime() - lastBootUp.ToUniversalTime();
}

Answer 6

For future reference, on *nix, use uptime(1)

Answer 7

Just as a reference; in the Win32 world, you can use:

GetTickCount, GetTickCount64, or Performance Counters

Answer 8

I suggest you to use the command line : net statistics workstation and parse the output. The time that machine is running is after "Statistics since ".

Answer 9

There's many definitions of what up could mean. Assuming we are talking about an application, then a remote ping of a simple service might suffice. Keynote provide enterprise level solutions for the web and there must be many others out, many free i would imagine.

UPDATE: given this was tagged .net I assumed we are interested in the uptime of an application. Is it an application within which you want to show uptime of the machine.