Question

我的程序运行时，我必须阻止窗口进入睡眠状态。

我不仅希望阻止睡眠定时器，我还想取消睡眠事件，如果我按下睡眠按钮或以任何其他方式主动告诉计算机睡眠。因此，SetThreadExecutionState是不够的。

或者......我实际上不必完全阻止睡眠，只需要将其延迟5-10秒以允许我的程序完成任务。

（我知道这是不好的程序行为，但它仅供个人使用。）

Answer 1

我遇到了这样的问题，通过usb连接了硬件设备。 XP / Vista会在中间睡觉/休眠...很棒你说，当它恢复时它可以继续。如果硬件仍然连接!!! 用户有习惯在他们感觉到的时候拉出电缆。

你需要处理XP和Vista

在XP陷阱下捕获WM_POWERBROADCAST并查找PBT_APMQUERYSUSPEND wparam。

   // See if bit 1 is set, this means that you can send a deny while we are busy
   if (message.LParam & 0x1)
   {
      // send the deny message
      return BROADCAST_QUERY_DENY;
   } // if
   else
   {
      return TRUE;
   } // else

在Vista下使用像这样的SetThreadExecutionState

// try this for vista, it will fail on XP
if (SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED | ES_AWAYMODE_REQUIRED) == NULL)
{
   // try XP variant as well just to make sure 
   SetThreadExecutionState(ES_CONTINUOUS | ES_SYSTEM_REQUIRED);
}  // if

当你的应用程序完成后，将其恢复正常

// set state back to normal
SetThreadExecutionState(ES_CONTINUOUS);

Answer 2

在考虑了vim的回答之后

“使用PowerCreateRequest，PowerSetRequest和PowerClearRequest 函数是首选方法。“

使用msdn上的链接的AvailabilityRequests.docx进入它（太多无法阅读），我在网上搜索了c#中基于PowerCreateRequest的具体示例并发现http://go4answers.webhost4life.com/Example/problem-monitor-wakeup-service-windows7-12092.aspx [编辑2016 - 不再可用]

根据我的需要复制并调整它（从msdn复制的CloseHandle的PInvoke）：

using System.Runtime.InteropServices;

    #region prevent screensaver, display dimming and automatically sleeping
    POWER_REQUEST_CONTEXT _PowerRequestContext;
    IntPtr _PowerRequest; //HANDLE

    // Availability Request Functions
    [DllImport("kernel32.dll")]
    static extern IntPtr PowerCreateRequest(ref POWER_REQUEST_CONTEXT Context);

    [DllImport("kernel32.dll")]
    static extern bool PowerSetRequest(IntPtr PowerRequestHandle, PowerRequestType RequestType);

    [DllImport("kernel32.dll")]
    static extern bool PowerClearRequest(IntPtr PowerRequestHandle, PowerRequestType RequestType);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
    internal static extern int CloseHandle(IntPtr hObject);

    // Availablity Request Enumerations and Constants
    enum PowerRequestType
    {
        PowerRequestDisplayRequired = 0,
        PowerRequestSystemRequired,
        PowerRequestAwayModeRequired,
        PowerRequestMaximum
    }

    const int POWER_REQUEST_CONTEXT_VERSION = 0;
    const int POWER_REQUEST_CONTEXT_SIMPLE_STRING = 0x1;
    const int POWER_REQUEST_CONTEXT_DETAILED_STRING = 0x2;

    // Availablity Request Structures
    // Note:  Windows defines the POWER_REQUEST_CONTEXT structure with an
    // internal union of SimpleReasonString and Detailed information.
    // To avoid runtime interop issues, this version of 
    // POWER_REQUEST_CONTEXT only supports SimpleReasonString.  
    // To use the detailed information,
    // define the PowerCreateRequest function with the first 
    // parameter of type POWER_REQUEST_CONTEXT_DETAILED.
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct POWER_REQUEST_CONTEXT
    {
        public UInt32 Version;
        public UInt32 Flags;
        [MarshalAs(UnmanagedType.LPWStr)]
        public string
            SimpleReasonString;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct PowerRequestContextDetailedInformation
    {
        public IntPtr LocalizedReasonModule;
        public UInt32 LocalizedReasonId;
        public UInt32 ReasonStringCount;
        [MarshalAs(UnmanagedType.LPWStr)]
        public string[] ReasonStrings;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct POWER_REQUEST_CONTEXT_DETAILED
    {
        public UInt32 Version;
        public UInt32 Flags;
        public PowerRequestContextDetailedInformation DetailedInformation;
    }
    #endregion



    /// <summary>
    /// Prevent screensaver, display dimming and power saving. This function wraps PInvokes on Win32 API. 
    /// </summary>
    /// <param name="enableConstantDisplayAndPower">True to get a constant display and power - False to clear the settings</param>
    private void EnableConstantDisplayAndPower(bool enableConstantDisplayAndPower)
    {
        if (enableConstantDisplayAndPower)
        {
            // Set up the diagnostic string
            _PowerRequestContext.Version = POWER_REQUEST_CONTEXT_VERSION;
            _PowerRequestContext.Flags = POWER_REQUEST_CONTEXT_SIMPLE_STRING;
            _PowerRequestContext.SimpleReasonString = "Continuous measurement"; // your reason for changing the power settings;

            // Create the request, get a handle
            _PowerRequest = PowerCreateRequest(ref _PowerRequestContext);

            // Set the request
            PowerSetRequest(_PowerRequest, PowerRequestType.PowerRequestSystemRequired);
            PowerSetRequest(_PowerRequest, PowerRequestType.PowerRequestDisplayRequired);
        }
        else
        {
            // Clear the request
            PowerClearRequest(_PowerRequest, PowerRequestType.PowerRequestSystemRequired);
            PowerClearRequest(_PowerRequest, PowerRequestType.PowerRequestDisplayRequired);

            CloseHandle(_PowerRequest);
        }
    }

Answer 3

使用PowerCreateRequest，PowerSetRequest和PowerClearRequest函数是首选方法。详细信息和示例代码（C / C＃）位于http://msdn.microsoft.com/en-us/library/windows/hardware/gg463205.aspx

内

Answer 4

set wsc = CreateObject("WScript.Shell")

做 WScript.Sleep (60*1000) wsc.SendKeys（“{SCROLLLOCK 2}”）循环

-将上面的代码放在记事本中，将文件另存为.vbs，然后双击该文件

Answer 5

如果它进入睡眠状态，请将其唤醒？

http://www.enterprisenetworksandservers.com/monthly/art.php?1049

Answer 6

同样的技术适用于防止应该使用屏幕保护程序。请参阅Programmatically prevent Windows screensaver from starting。

请注意，某些安全设置可以覆盖此设置（强制计算机在一定时间后锁定）。

Answer 7

下面是我尝试使用现代电力可用性请求API（取代SetThreadExecutionState）作为suggested by vim。

我正在使用一个不错的P / Invoke NuGet，我遇到了Vanara.PInvoke.Kernel32：

using Vanara.PInvoke;
using static Vanara.PInvoke.Kernel32;

// create request object
using var request = PowerCreateRequest(new REASON_CONTEXT("App FOO is working"));
if (request.IsInvalid)
{
    throw new InvalidOperationException(
       $"Could not create power availability request: {Win32Error.GetLastError()}");
}

// send request
if (!PowerSetRequest(request, POWER_REQUEST_TYPE.PowerRequestSystemRequired))
{
    throw new InvalidOperationException(
       $"Could not send power availability request: {Win32Error.GetLastError()}");
}
    
// do stuff that required the machine to be up
Console.WriteLine("Doing stuff...");
await Task.Delay(5000);

// clear request
if (!PowerClearRequest(request, POWER_REQUEST_TYPE.PowerRequestSystemRequired))
{
    Console.WriteLine(
      "WARNING: Could not clear power availability request: {0}",
      Win32Error.GetLastError());
}

您可以通过从管理终端发出powercfg /requests来查看请求的执行情况。

我的程序运行时防止窗口进入睡眠状态？

7 个答案: