Shutdown, Restart, or Log Off your computer using VB.Net
Here's a quick code sample demonstrating how to use Process.Start in .NET to shutdown, restart, or log off your computer.
Simply design the form as image given below and use the given code.
The code for the whole program will be as follows
Code:
Public Class frmShutdown
Private Sub btnShutdown_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnShutdown.Click
System.Diagnostics.Process.Start("shutdown", "-s -t 00")
'This will make the computer Shutdown
End Sub
Private Sub btnRestart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRestart.Click
System.Diagnostics.Process.Start("shutdown", "-r -t 00")
'This will make the computer Restart
End Sub
Private Sub btnLogOff_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLogOff.Click
System.Diagnostics.Process.Start("shutdown", "-l -t 00")
'This will make the computer Log Off
End Sub
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
End
'This will make the program to terminate(end the program)
End Sub
End Class
Re: Shutdown, Restart, or Log Off your computer using VB.Net
Thanks,
I was searching for this type of code from long time.
and this really works fine.
Thanks again...........:thumbup1:
Re: Shutdown, Restart, or Log Off your computer using VB.Net
There are few set of codes to execute to switch of your system through vb.net. Some of this parameters are quiet similar to what you use in cmd. So for turning off your computer through vb.net you just have to execute "System.Diagnostics.Process.Start("shutdown.exe", "-s -t 0")". Here in place of 0 you can add the seconds. This will delay the shutdown. In the same way if you want to reboot then you can to execute "System.Diagnostics.Process.Start("shutdown.exe", "-r -t 0")". Again here you can see the parameters are quiet similar. You can also delay the reboot through adding a few seconds.
Re: Shutdown, Restart, or Log Off your computer using VB.Net
I am using "System.Diagnostics.Process.Start("shutdown.exe", "-l -t 0")" to logoff. This is quiet simple. Here the parameters are quiet straight. For turning off you require to place Process.Start("shutdown","-s") in the code. For restarting the system you have to add Process.Start("shutdown","-r") and for log off you can use Process.Start("shutdown","-l"). So this makes your job a bit simple. I am not able to find anything about hibernation. I am still looking for code samples that can help me to do more with vb.net.
Re: Shutdown, Restart, or Log Off your computer using VB.Net
This is divine! I am trying to build a stand alone program that can be used for reserving tickets and booking seats, building snyposis etc.. I originally did it using VB but have to convert it to VB .NET
A lot of work!
Re: Shutdown, Restart, or Log Off your computer using VB.Net
For Hibernating your computer use the following method:
VB.net code:
1) Check for Hibernate Support.
a) Declare the Function
Code:
Public Declare Function IsPwrHibernateAllowed Lib "Powrprof.dll" Alias "IsPwrHibernateAllowed" () As Integer
b) Check for support
Code:
Dim boolHibernateSupport as Boolean = CBool(IsPwrHibernateAllowed())
2) If boolHibernateSupport is True then
Code:
If Application.SetSuspendState(PowerState.Hibernate, True, False) = False Then
' Add ErrorHandling code here
End If
You may search the MSDN library for more information about the SetSuspendState Function.
The shutdown -s method mentioned above is simpler. The below mentioned method is more complicated but allows greater control. Also, it does not rely on the Shutdown command.
Alternatively you can use the following method to Shutdown/Restart the PC
1) Declare the function
Code:
Public Declare Function ExitWindowsEx Lib "user32.dll" Alias "ExitWindowEx" (ByVal uFlags As System.UInt32, ByVal dwReason As System.UInt32) As Boolean
2) Declare the Constants (flags) needed.
Code:
Public Enum ShutdownType
EWX_HYBRID_SHUTDOWN = &H400000
EWX_LOGOFF = &H0
EWX_POWEROFF = &H8
EWX_REBOOT = &H2
EWX_RESTARTAPPS = &H40
EWX_SHUTDOWN = &H1
EWX_FORCE = &H4
EWX_FORCEIFHUNG = &H10
End Enum
Public Enum ShutdownReason
SHTDN_REASON_MAJOR_APPLICATION = &H40000
SHTDN_REASON_MAJOR_HARDWARE = &H10000
SHTDN_REASON_MAJOR_LEGACY_API = &H70000
SHTDN_REASON_MAJOR_OPERATINGSYSTEM = &H20000
SHTDN_REASON_MAJOR_OTHER = &H0
SHTDN_REASON_MAJOR_POWER = &H60000
SHTDN_REASON_MAJOR_SOFTWARE = &H30000
SHTDN_REASON_MAJOR_SYSTEM = &H50000
SHTDN_REASON_MINOR_BLUESCREEN = &HF
SHTDN_REASON_MINOR_CORDUNPLUGGED = &HB
SHTDN_REASON_MINOR_DISK = &H7
SHTDN_REASON_MINOR_ENVIRONMENT = &HC
SHTDN_REASON_MINOR_HARDWARE_DRIVER = &HD
SHTDN_REASON_MINOR_HOTFIX = &H11
SHTDN_REASON_MINOR_HOTFIX_UNINSTALL = &H17
SHTDN_REASON_MINOR_HUNG = &H5
SHTDN_REASON_MINOR_INSTALLATION = &H2
SHTDN_REASON_MINOR_MAINTENANCE = &H1
SHTDN_REASON_MINOR_MMC = &H19
SHTDN_REASON_MINOR_NETWORK_CONNECTIVITY = &H14
SHTDN_REASON_MINOR_NETWORKCARD = &H9
SHTDN_REASON_MINOR_OTHER = &H0
SHTDN_REASON_MINOR_OTHERDRIVER = &HE
SHTDN_REASON_MINOR_POWER_SUPPLY = &HA
SHTDN_REASON_MINOR_PROCESSOR = &H8
SHTDN_REASON_MINOR_RECONFIG = &H4
SHTDN_REASON_MINOR_SECURITY = &H13
SHTDN_REASON_MINOR_SECURITYFIX = &H12
SHTDN_REASON_MINOR_SECURITYFIX_UNINSTALL = &H18
SHTDN_REASON_MINOR_SERVICEPACK = &H10
SHTDN_REASON_MINOR_TERMSRV = &H20
SHTDN_REASON_MINOR_UNSTABLE = &H6
SHTDN_REASON_MINOR_UPGRADE = &H3
SHTDN_REASON_MINOR_WMI = &H15
SHTDN_REASON_FLAG_USER_DEFINED = &H40000000
SHTDN_REASON_FLAG_PLANNED = &H80000000
End Enum
3) Run the command:
Code:
ExitWindowsEx(ShutdownType.EWX_POWEROFF And ShutdownType.EWX_SHUTDOWN, ShutdownReason.SHTDN_REASON_MAJOR_POWER And ShutdownReason.SHTDN_REASON_FLAG_PLANNED)
Of course, this code allows more control. You can also use the new Hybrid shutdown supported by Windows 8.
