怎样用c#做定时开机和关机的程序?
如题

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Remote Shutdown or Reboot with Telnet and C#

http://www.codeproject.com/csharp/remoteshutdownsubmission.asp
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http://www.codeproject.com/useritems/ShutdownComputer.asp
或者自己在代码用多线程扫描定时器
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关机
using System;
using System.Runtime.InteropServices;

class shoutdown{
[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct TokPriv1Luid
{
public int Count;
public long Luid;
public int Attr;
}

[DllImport( "kernel32.dll ", ExactSpelling=true) ]
internal static extern IntPtr GetCurrentProcess();

[DllImport( "advapi32.dll ", ExactSpelling=true, SetLastError=true) ]
internal static extern bool OpenProcessToken( IntPtr h, int acc, ref IntPtr phtok );

[DllImport( "advapi32.dll ", SetLastError=true) ]
internal static extern bool LookupPrivilegeValue( string host, string name, ref long pluid );

[DllImport( "advapi32.dll ", ExactSpelling=true, SetLastError=true) ]
internal static extern bool AdjustTokenPrivileges( IntPtr htok, bool disall,
ref TokPriv1Luid newst, int len, IntPtr prev, IntPtr relen );

[DllImport( "user32.dll ", ExactSpelling=true, SetLastError=true) ]
internal static extern bool ExitWindowsEx( int flg, int rea );

internal const int SE_PRIVILEGE_ENABLED = 0x00000002;
internal const int TOKEN_QUERY = 0x00000008;
internal const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
internal const string SE_SHUTDOWN_NAME = "SeShutdownPrivilege ";
internal const int EWX_LOGOFF = 0x00000000;
internal const int EWX_SHUTDOWN = 0x00000001;
internal const int EWX_REBOOT = 0x00000002;
internal const int EWX_FORCE = 0x00000004;
internal const int EWX_POWEROFF = 0x00000008;
internal const int EWX_FORCEIFHUNG = 0x00000010;

private static void DoExitWin(int flg)
{
bool ok;
TokPriv1Luid tp;
IntPtr hproc = GetCurrentProcess();
IntPtr htok = IntPtr.Zero;
ok = OpenProcessToken( hproc, TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref htok );
tp.Count = 1;
tp.Luid = 0;
tp.Attr = SE_PRIVILEGE_ENABLED;
ok = LookupPrivilegeValue( null, SE_SHUTDOWN_NAME, ref tp.Luid );
ok = AdjustTokenPrivileges( htok, false, ref tp, 0, IntPtr.Zero, IntPtr.Zero );
ok = ExitWindowsEx( flg, 0 );
}

public static void Main()
{
Console.WriteLine( "正在关闭计算机…… ");
// 修改 EWX_SHUTDOWN 或者 EWX_LOGOFF, EWX_REBOOT等实现不同得功能。
// 在XP下可以看到帮助信息，以得到不同得参数
// SHUTDOWN /?
DoExitWin(EWX_SHUTDOWN);
}
//--开机 需要 网卡支持远程唤醒 有点难度 关注
------解决方案--------------------
可以这样呼叫:

呼叫者: BB..BB.. 我是呼叫者请马上打开电脑!!

被呼叫者:OK!这就打开电脑!

这样就呼叫成功了!!当然中间使用了电话这个插件!