关于winapi：C#如何关闭特定的监视器？

C# How to turn off specific monitor?

我知道如何使用user32.dll打开/关闭所有监视器。

1 2	SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) -1); SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) 2);

但是我只想打开/关闭一个。

相关讨论

您始终可以从nirsoft运行ControlMyMonitor.exe。

从1.20版开始，您可以使用以下方法打开和关闭显示器：

1	ControlMyMonitor.exe /SwitchValue"\\\\.\\DISPLAY1\\Monitor0" D6 1 5

@Dai是正确的。使用低级监视器配置功能可以关闭指定的监视器。

下面是选择一台显示器并在5秒钟后将其关闭后将其关闭的示例。

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#include <windows.h>
#include <vector>
#include <lowlevelmonitorconfigurationapi.h>

#pragma comment(lib,"Dxva2.lib")

const BYTE PowerMode = 0xD6; // VCP Code defined in VESA Monitor Control Command Set (MCCS) standard
const DWORD PowerOn = 0x01;
const DWORD PowerOff = 0x04;

// Monitor description struct
struct MonitorDesc
{
HANDLE hdl;
DWORD power;
};

// Monitor enumeration callback
BOOL CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdcMonitor, LPRECT lprcMonitor, LPARAM dwData)
{
std::vector<MonitorDesc>* pMonitors = reinterpret_cast<std::vector<MonitorDesc>*>(dwData);

DWORD nMonitorCount;
if (GetNumberOfPhysicalMonitorsFromHMONITOR(hMonitor, &nMonitorCount))
{
PHYSICAL_MONITOR* pMons = new PHYSICAL_MONITOR[nMonitorCount];

if (GetPhysicalMonitorsFromHMONITOR(hMonitor, nMonitorCount, pMons))
{
for (DWORD i = 0; i < nMonitorCount; i++)
{
MonitorDesc desc;
desc.hdl = pMons[i].hPhysicalMonitor;

pMonitors->push_back(desc);
}
}
delete[] pMons;
}
return TRUE;
}

// Switch monitor power
void MonitorSwitch(MonitorDesc& monitor, DWORD mode)
{
if (monitor.power == mode)
return;

SetVCPFeature(monitor.hdl, PowerMode, mode);
monitor.power = mode;
}

int main()
{
std::vector<MonitorDesc> monitors;
EnumDisplayMonitors(NULL, NULL, &MonitorEnumProc, reinterpret_cast<LPARAM>(&monitors));

// Init
for (auto& monitor : monitors)
{
monitor.power = PowerOn;
}

// Here select the first one monitor as example
MonitorDesc targetMonitor = monitors[0];

// turn off
if (targetMonitor.power == PowerOn)
{
MonitorSwitch(targetMonitor, PowerOff);
}

Sleep(5000);

// turn on
if (targetMonitor.power == PowerOff)
{
MonitorSwitch(targetMonitor, PowerOn);
}
}