C# 以编程方式停止屏幕保护程序

如何在屏幕保护程序运行时停止它？无需移动鼠标或按键盘上的键。我的应用程序输入来自读卡器，如果屏幕保护程序正在运行，我的应用程序仍然工作正常，但当读卡器收到输入时，屏幕保护程序不会停止

我试过了，似乎对我不起作用

我试着在这个线程上假装鼠标移动，正如线程中提到的，它在Windows8上似乎不起作用（我在Windows8.1上运行）

我甚至尝试了

SendKeys

我看到的大多数其他问题/示例都是关于停止启动屏幕保护程序的，这是我不想要的。如果读卡器中有输入，我希望屏幕保护程序启动和停止。

使用此winAPI告诉操作系统线程正在使用，即使用户没有与计算机交互。这将防止屏幕保护程序出现，并阻止机器自动暂停

使应用程序能够通知系统它正在使用，从而防止系统在应用程序运行时进入睡眠状态或关闭显示器

有一系列标志可指定当前线程的新状态：

[DllImport("kernel32.dll", CharSet = CharSet.Auto,SetLastError = true)]
static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

[FlagsAttribute]
public enum EXECUTION_STATE :uint
{
   ES_AWAYMODE_REQUIRED = 0x00000040,
   ES_CONTINUOUS = 0x80000000,
   ES_DISPLAY_REQUIRED = 0x00000002,
   ES_SYSTEM_REQUIRED = 0x00000001
 }

//To stop screen saver and monitor power off event
//You can combine several flags and specify multiple behaviors with a single call
SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_SYSTEM_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);

//To reset or allow those event again you have to call this API with only ES_CONTINUOUS
SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);//This will reset as normal

• ES_AWAYMODE_REQUIRED（0x00000040）：启用离开模式
• ES_DISPLAY_REQUIRED（0x00000002）：通过重置显示空闲计时器，强制打开显示
• ES_SYSTEM_REQUIRED（0x00000001）：通过重置系统空闲计时器，强制系统处于工作状态
• ES_CONTINUOUS（0x8000000）：通知系统正在设置的状态应保持有效，直到下一个使用ES_CONTINUOUS的调用和其他状态标志之一被清除

因为这是一个winAPI，所以您必须这样做：

[DllImport("kernel32.dll", CharSet = CharSet.Auto,SetLastError = true)]
static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

[FlagsAttribute]
public enum EXECUTION_STATE :uint
{
   ES_AWAYMODE_REQUIRED = 0x00000040,
   ES_CONTINUOUS = 0x80000000,
   ES_DISPLAY_REQUIRED = 0x00000002,
   ES_SYSTEM_REQUIRED = 0x00000001
 }

//To stop screen saver and monitor power off event
//You can combine several flags and specify multiple behaviors with a single call
SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_SYSTEM_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);

//To reset or allow those event again you have to call this API with only ES_CONTINUOUS
SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);//This will reset as normal

用户定义的类型：

[DllImport("kernel32.dll", CharSet = CharSet.Auto,SetLastError = true)]
static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

[FlagsAttribute]
public enum EXECUTION_STATE :uint
{
   ES_AWAYMODE_REQUIRED = 0x00000040,
   ES_CONTINUOUS = 0x80000000,
   ES_DISPLAY_REQUIRED = 0x00000002,
   ES_SYSTEM_REQUIRED = 0x00000001
 }

//To stop screen saver and monitor power off event
//You can combine several flags and specify multiple behaviors with a single call
SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_SYSTEM_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);

//To reset or allow those event again you have to call this API with only ES_CONTINUOUS
SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);//This will reset as normal

下面是调用过程：

[DllImport("kernel32.dll", CharSet = CharSet.Auto,SetLastError = true)]
static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);

[FlagsAttribute]
public enum EXECUTION_STATE :uint
{
   ES_AWAYMODE_REQUIRED = 0x00000040,
   ES_CONTINUOUS = 0x80000000,
   ES_DISPLAY_REQUIRED = 0x00000002,
   ES_SYSTEM_REQUIRED = 0x00000001
 }

//To stop screen saver and monitor power off event
//You can combine several flags and specify multiple behaviors with a single call
SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_SYSTEM_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);

//To reset or allow those event again you have to call this API with only ES_CONTINUOUS
SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);//This will reset as normal

根据这个API，使用起来是安全的

系统维护调用SetThreadExecutionState的应用程序计数。系统跟踪调用SetThreadExecutionState的每个线程，并相应地调整计数器。如果此计数器达到零且没有任何用户输入，则系统进入睡眠状态

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如果应用程序在重置标志之前崩溃，系统将进行调整并自动重置。

您是否编写了屏幕保护程序？@ManoDestra您的意思是什么？这只是windows上“个性化”菜单下的一个普通屏幕保护程序。我想你是说“不”。在这种情况下，您可能很难做到这一点。如果您自己编写屏幕保护程序，操作会简单得多。在智能卡读卡器输入上，您可以像这样更改注册表值-调用registry.SetValue（“HKEY_CURRENT_USER\Control Panel\Desktop”、“Screensave active”、“1”），这在windows 7上有效。不太清楚Windows 8。@Sanket这是怎么回事？我检查了这个值，现在已经是1了。非常清楚的答案值得更多的投票。我知道最初的问题是关于防止屏幕保护程序，但我将证明

SetThreadExecutionState

对于在没有鼠标或键盘活动时防止锁定屏幕是绝对有效的。