C#阻止计算机关闭显示器和待机

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于大大大洋 2022-11-21 09:01:03 博主文章分类：C#

文章标签 阻止关闭显示器阻止计算机待机 WindowsAPI 锁屏测试环境 文章分类 数据库

一、测试

测试环境：Win10
备注：
1、管理员和非管理员权限测试都正常；
2、执行阻止关闭显示器和待机后，退出程序会自动恢复；
3、使用Win+L切换到锁屏界面时，同样生效；

二、代码

public class SystemSleepAPI
{
    //定义API函数
    [DllImport("kernel32.dll")]
    static extern uint SetThreadExecutionState(ExecutionFlag flags);

    [Flags]
    enum ExecutionFlag : uint
    {
        System = 0x00000001,
        Display = 0x00000002,
        Continus = 0x80000000,
    }

    /// <summary>
    ///阻止系统休眠，直到线程结束恢复休眠策略
    /// </summary>
    /// <param name="includeDisplay">是否阻止关闭显示器</param>
    public static void PreventSleep(bool includeDisplay = false)
    {
        try
        {
            if (includeDisplay)
                SetThreadExecutionState(ExecutionFlag.System | ExecutionFlag.Display | ExecutionFlag.Continus);
            else
                SetThreadExecutionState(ExecutionFlag.System | ExecutionFlag.Continus);
        }
        catch { }
    }

    /// <summary>
    ///恢复系统休眠策略
    /// </summary>
    public static void ResotreSleep()
    {
        try { SetThreadExecutionState(ExecutionFlag.Continus); } catch { }
    }

    /// <summary>
    ///重置系统休眠计时器
    /// </summary>
    /// <param name="includeDisplay">是否阻止关闭显示器</param>
    public static void ResetSleepTimer(bool includeDisplay = false)
    {
        try
        {
            if (includeDisplay)
                SetThreadExecutionState(ExecutionFlag.System | ExecutionFlag.Display);
            else
                SetThreadExecutionState(ExecutionFlag.System);
        }
        catch { }
    }
}