关机、重启、注销源代码？
本人是Visual Basic.Net的初学者
在Visual Basic.Net中如何实现关机、重启、注销？
请各位老大给我讲解一下！最好是有源代码！
问题点数：20、回复次数：9Top
1 楼rzpc（淡蓝色）回复于 2005-06-11 09:44:29 得分 20
使用Shutdown命令
system.Diagnostics.Process.Start("shutdown.exe")
关于ShutDown的参数描述如下:
===============================================================
shutdown [/i | /l | /s | /r | /a | /p | /h | /e] [/f]
[/m \\computer][/t xxx][/d [p:]xx:yy [/c "comment"]]
/i 显示图形用户界面(GUI)。
这必须是第一个选项
/l 注销。这不能与 /m 或 /d 选项一起使用
/s 关闭计算机
/r 关闭并重启动计算机
/a 放弃系统关闭。
这只能在超时过程中使用
/p 关闭本地计算机，没有超时或警告。
这只能与 /d 选项一起使用
/h 休眠本地计算机。
这只能与 /f 选项一起使用
/e 将计算机的意外关闭原因记入文档
/m \\computer 指定目标计算机
/t xxx 设置关闭前的超时为 xxx 秒。
有效范围是 0-600，默认为 30
/c "comment" 重启动或关闭的原因的注释。
最大允许 127 个字符
/f 强制正在运行的应用程序关闭而不事先警告用户
/d [p:]xx:yy 提供重启动或关闭的原因
p 表明重启动或关闭是计划内的
xx 是主要原因号(小于 256 的正整数)
yy 是次要原因号(小于 65536 的正整数)
原因:
(E = 预期 U = 意外 P = 计划, C = 自定义)
========================================================
例:关机
system.Diagnostics.Process.Start("shutdown.exe","s")
重新启动
system.Diagnostics.Process.Start("shutdown.exe","r")
注销
system.Diagnostics.Process.Start("shutdown.exe","l")
最后在此操作之后 马上退出当前应用程序:
system.Diagnostics.Process.Start("shutdown.exe","s")
Application.Exit()Top
2 楼ferrari1231（）回复于 2005-06-11 10:58:07 得分 0
学习中Top
3 楼lzmtw（水如烟）回复于 2005-06-11 11:56:41 得分 0
可以做为FAQ.Top
4 楼dengxw（威威）回复于 2005-06-11 12:33:19 得分 0
怎么我在2000里找不到SHUTDOWN文件呢?~````Top
5 楼leongwong（）回复于 2005-06-11 12:41:05 得分 0
学习Top
6 楼my36z（晕死~真难改）回复于 2005-06-11 12:46:45 得分 0
只有XP及以上才有，这个代码的确很方便，不过好像还有其他方法。去多载点vb实例代码之类的，里面一定有Top
7 楼studydotnet（Dreamfly）回复于 2005-06-11 12:57:46 得分 0
多问一个，那又如何定时关机呢？在上面加个时间吧Top
8 楼tihua（告诉我吧）回复于 2005-06-11 13:09:00 得分 0
学习Top
9 楼singlepine（小山）回复于 2005-09-07 22:46:57 得分 0
Imports System
Imports System.Text
Imports System.Diagnostics
Imports System.Runtime.InteropServices
Public Class WindowsController
Public Enum RestartOptions
LogOff = 0
PowerOff = 8
Reboot = 2
ShutDown = 1
Suspend = -1
Hibernate = -2
End Enum
Public Structure LUID
Dim LowPart As Integer
Dim HighPart As Integer
End Structure
Public Structure LUID_AND_ATTRIBUTES
Dim pLuid As LUID
Dim Attributes As Integer
End Structure
Public Structure TOKEN_PRIVILEGES
Dim PrivilegeCount As Integer
Dim Privileges As LUID_AND_ATTRIBUTES
End Structure
Private Const TOKEN_ADJUST_PRIVILEGES = &H20
Private Const TOKEN_QUERY = &H8
Private Const SE_PRIVILEGE_ENABLED = &H2
Private Const FORMAT_MESSAGE_FROM_SYSTEM = &H1000
Private Const EWX_FORCE = 4
Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (ByVal lpLibFileName As String) As IntPtr
Declare Function FreeLibrary Lib "kernel32" (ByVal hLibModule As IntPtr) As Integer
Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As IntPtr, ByVal lpProcName As String) As IntPtr
Declare Function SetSuspendState Lib "Powrprof" (ByVal Hibernate As Integer, ByVal ForceCritical As Integer, ByVal DisableWakeEvent As Integer) As Integer
Declare Function OpenProcessToken Lib "advapi32.dll" (ByVal ProcessHandle As IntPtr, ByVal DesiredAccess As Integer, ByRef TokenHandle As IntPtr) As Integer
Declare Function LookupPrivilegeValue Lib "advapi32.dll" Alias "LookupPrivilegeValueA" (ByVal lpSystemName As String, ByVal lpName As String, ByRef lpLuid As LUID) As Integer
Declare Function AdjustTokenPrivileges Lib "advapi32.dll" (ByVal TokenHandle As IntPtr, ByVal DisableAllPrivileges As Integer, ByRef NewState As TOKEN_PRIVILEGES, ByVal BufferLength As Integer, ByRef PreviousState As TOKEN_PRIVILEGES, ByRef ReturnLength As Integer) As Integer
Declare Function ExitWindowsEx Lib "user32" (ByVal uFlags As Integer, ByVal dwReserved As Integer) As Integer
Declare Function FormatMessage Lib "kernel32" Alias "FormatMessageA" (ByVal dwFlags As Integer, ByVal lpSource As IntPtr, ByVal dwMessageId As Integer, ByVal dwLanguageId As Integer, ByVal lpBuffer As StringBuilder, ByVal nSize As Integer, ByVal Arguments As Integer) As Integer
Public Sub ExitWindows(ByVal how As RestartOptions, ByVal force As Boolean)
Select Case how
Case RestartOptions.Suspend
SuspendSystem(False, force)
Case RestartOptions.Hibernate
SuspendSystem(True, force)
Case Else
ExitWindows(Convert.ToInt32(how), force)
End Select
End Sub
Protected Sub ExitWindows(ByVal how As Integer, ByVal force As Boolean)
EnableToken("SeShutdownPrivilege")
If force Then how = how Or EWX_FORCE
If (ExitWindowsEx(how, 0) = 0) Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
End Sub
Protected Sub EnableToken(ByVal privilege As String)
If Not CheckEntryPoint("advapi32.dll", "AdjustTokenPrivileges") Then Return
Dim tokenHandle As IntPtr = IntPtr.Zero
Dim privilegeLUID = New LUID()
Dim newPrivileges = New TOKEN_PRIVILEGES()
Dim tokenPrivileges As TOKEN_PRIVILEGES
If (OpenProcessToken(Process.GetCurrentProcess().Handle, TOKEN_ADJUST_PRIVILEGES Or TOKEN_QUERY, tokenHandle)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
If (LookupPrivilegeValue("", privilege, privilegeLUID)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
tokenPrivileges.PrivilegeCount = 1
tokenPrivileges.Privileges.Attributes = SE_PRIVILEGE_ENABLED
tokenPrivileges.Privileges.pLuid = privilegeLUID
Dim Size As Integer = 4
If (AdjustTokenPrivileges(tokenHandle, 0, tokenPrivileges, 4 + (12 * tokenPrivileges.PrivilegeCount), newPrivileges, Size)) = 0 Then Throw New PrivilegeException(FormatError(Marshal.GetLastWin32Error()))
End Sub
Protected Sub SuspendSystem(ByVal hibernate As Boolean, ByVal force As Boolean)
If Not CheckEntryPoint("powrprof.dll", "SetSuspendState") Then Throw New PlatformNotSupportedException("The SetSuspendState method is not supported on this system!")
SetSuspendState(Convert.ToInt32(IIf(hibernate, 1, 0)), Convert.ToInt32(IIf(force, 1, 0)), 0)
End Sub
Protected Function CheckEntryPoint(ByVal library As String, ByVal method As String) As Boolean
Dim libPtr As IntPtr = LoadLibrary(library)
If Not libPtr.Equals(IntPtr.Zero) Then
If Not GetProcAddress(libPtr, method).Equals(IntPtr.Zero) Then
FreeLibrary(libPtr)
Return True
End If
FreeLibrary(libPtr)
End If
Return False
End Function
Protected Function FormatError(ByVal number As Integer) As String
Dim Buffer = New StringBuilder(255)
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, IntPtr.Zero, number, 0, Buffer, Buffer.Capacity, 0)
Return Buffer.ToString()
End Function
End Class
Public Class PrivilegeException
Inherits Exception
Public Sub New()
MyBase.New()
End Sub
Public Sub New(ByVal message As String)
MyBase.New(message)
End Sub
End Class
例如实现注销功能：
Dim shutdown As New WindowsController()
shutdown.ExitWindows(shutdown.RestartOptions.LogOff, False)
Top
