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本篇文章給大家分享的是有關VB.NET中怎么實現定時關機,小編覺得挺實用的,因此分享給大家學習,希望大家閱讀完這篇文章后可以有所收獲,話不多說,跟著小編一起來看看吧。
具體步驟如下:
首先在Form1窗體上添加一個Label1控件屬性text設置為:今天:2.然后分別添加3個button控件name分別為button1、button2、button3它們的text屬性分別為1. 關閉計算機(啟動定時器)2. 注銷3. 重新啟動。
現在我們就需要為程序加上一個定時器了,這個定時器需要與textbox1控件相關聯,輸入正確時間格式后就可以啟動定時功能了。然后我們需要在窗體上添加一個timer、一個textbox1控件、和一個RadioButton1控件。讓它們保留默認值不變。其中. TextBox1控件的text屬性設置為:00:00:00 。RadioButton1控件text設置為:指定時間關機|時間格式:00小時:00分鐘:00秒
雙擊窗體進入常規-聲明Public Class Form1 事件中。以上介紹VB.NET實現定時關機
Imports System.Runtime.InteropServices Imports Microsoft.VisualBasic Public Class Form1 '調用系統參數 Friend Shared Function GetCurrentProcess() As IntPtr End Function Friend Shared Function OpenProcessToken(ByVal h As IntPtr, ByVal acc As Integer, ByRef phtok As IntPtr) As Boolean End Function Friend Shared Function LookupPrivilegeValue(ByVal host As String, ByVal name As String, ByRef pluid As Long) As Boolean End Function Friend Shared Function AdjustTokenPrivileges(ByVal htok As IntPtr, ByVal disall As Boolean, ByRef newst As TokPriv1Luid, ByVal len As Integer, ByVal prev As IntPtr, ByVal relen As IntPtr) As Boolean End Function Friend Shared Function ExitWindowsEx(ByVal flg As Integer, ByVal rea As Integer) As Boolean End Function Friend Const SEPRIVILEGEENABLED As Integer = &H2 Friend Const TOKENQUERY As Integer = &H8 Friend Const TOKENADJUSTPRIVILEGES As Integer = &H20 Friend Const SESHUTDOWNNAME As String = "SeShutdownPrivilege" Friend Const EWXLOGOFF As Integer = &H0 '注銷計算機 Friend Const EWXSHUTDOWN As Integer = &H1'關閉計算機 Friend Const EWXREBOOT As Integer = &H2'重新啟動計算機 Friend Const EWXFORCE As Integer = &H4'關閉所有進程,注銷計算機 Friend Const EWXPOWEROFF As Integer = &H8 Friend Const EWXFORCEIFHUNG As Integer = &H10 '引用參數 Friend Structure TokPriv1Luid Public Count As Integer Public Luid As Long Public Attr As Integer End Structure Private Shared Sub DoExitWin(ByVal flg As Integer) Dim xc As Boolean '判斷語句 Dim tp As TokPriv1Luid Dim hproc As IntPtr = GetCurrentProcess() '調用進程值 Dim htok As IntPtrIntPtr = IntPtr.Zero xc = OpenProcessToken(hproc, TOKENADJUSTPRIVILEGES Or TOKENQUERY, htok) tp.Count = 1 tp.Luid = 0 tp.Attr = SEPRIVILEGEENABLED xc = LookupPrivilegeValue(Nothing, SESHUTDOWNNAME, tp.Luid) xc = AdjustTokenPrivileges(htok, False, tp, 0, IntPtr.Zero, IntPtr.Zero) xc = ExitWindowsEx(flg, 0) End Sub Public Shared Sub Reboot() DoExitWin((EWXFORCE Or EWXREBOOT)) '重新啟動計算機 End Sub Public Shared Sub PowerOff() DoExitWin((EWXFORCE Or EWXPOWEROFF)) '關閉計算機 End Sub Public Shared Sub LogoOff() DoExitWin((EWXFORCE Or EWXLOGOFF)) '注銷計算機 End Sub Dim entTime As Object '保存輸入時間 Dim xianzaiTime As Object '保存實時時間 Dim startTime As Object '保存開始定時時間
以上就是VB.NET中怎么實現定時關機,小編相信有部分知識點可能是我們日常工作會見到或用到的。希望你能通過這篇文章學到更多知識。更多詳情敬請關注億速云行業資訊頻道。
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