reboot the PC from coding with VB.NET

Question

how to reboot the PC from coding with VB.Net framework 2.0 or above

i also like to set timer for rebooting process.

does VB.net framework support for above process? do i need to add library or DLL file

Thanks in advance.

Answer 1

Ref: Programmatically restart computer from .NET

There are different methods that you can use to shutdown/restart your computer through C# code. Following are some of them:

1. Using Win32 API.

2. Using "Shutdown" command. ie internally firing shutdown.exe /s

Code Snippet

System.Diagnostics.Process.Start("ShutDown", "/r")
// If immediately then use 
// System.Diagnostics.Process.Start("ShutDown", "/r /t 00") 



/s = shutdown
/r = restart
/t = timed shutdown

Do "shutdown/?" at command prompt to know more about the command.

Ref: Rebooting a Windows Box Programmatically

The first thing that we need to do is to reference the InteropServices namespace so that we can access the Windows API functions. To do this, add a new using directive at the start of the code for the form.

using System.Runtime.InteropServices;

put the following declaration appears within the form's class code block

[DllImport("user32.dll", SetLastError = true)]
static extern int ExitWindowsEx(uint uFlags, uint dwReason);   

then call the this method..

    BOOL b = ExitWindowsEx( EWX_REBOOT|EWX_FORCE,
    SHTDN_REASON_MINOR_MAINTENANCE |
    SHTDN_REASON_FLAG_PLANNED);

More References:
Shutdown, Restart, or Log Off your computer using VB.Net
Simplest way to Programmatically ShutDown or Restart your System using C# or VB.NET

Answer 2

There are so many way that we can shutdown or reboot the windows by coding. But I like present very easiest way and shortest way as follow. It's nothing, using “Shell” commend.

' Example of rebooting PC:
' Reboot computer after timeout of 5
Shell ("Shutdown -r -t 5")  

' Switches:
'   -l  Log off profile
'   -s  Shut down computer
'   -r  Restart computer
'   -f  Force applications to close
'   -t  Set a timeout for shutdown
'   -m \\computer name (Shutdown remote computer)
'   -i  Show the Shutdown GUI

Answer 3

See:

• http://www.eggheadcafe.com/tutorials/vb/6eebdaf1-a5ce-47dd-a1e5-23e707bbf369/shutdown-restart-or-log-off-your-computer-using-vbnet.aspx
• http://www.codeproject.com/Articles/12815/Shutdown-Restart-VB-Net

Code: = System.Diagnostics.Process.Start("ShutDown", "/r") Here are the other options: C:>shutdown Usage: shutdown [-i | -l | -s | -r | -a] [-f] [-m \\computername] [-t xx] [-c "c omment"] [-d up:xx:yy]

  No args Display this message (same as -?) -i Display GUI interface, must be the first option -l Log off (cannot be used with -m option) -s Shutdown the computer -r Shutdown and restart the computer -a Abort a system shutdown -m \\\\computername Remote computer to shutdown/restart/abort -t xx Set timeout for shutdown to xx seconds -c "comment" Shutdown comment (maximum of 127 characters) -f Forces running applications to close without war ning -d [u][p]:xx:yy The reason code for the shutdown u is the user code p is a planned shutdown code xx is the major reason code (positive integer le ss than 256) yy is the minor reason code (positive integer le ss than 65536) 

Answer 4

There isn't anything directly in the framework, but can use p/Invoke to call ExitWindowsEx .

See the definition at pinvoke.net :

Declare Function ExitWindowsEx Lib "user32" (ByVal dwOptions As Int32, ByVal dwReserved As Int32) As Int32

Answer 5

This?

Private Sub {BTNNAME}_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles {BTNNAME}.Click
  System.Diagnostics.Process.Start("shutdown", "-r -t 00")
End Sub