“以编程方式将我的Windows桌面扩展到此监视器上”

时间：2008-11-08 19:11:12

标签： windows powershell wmi multiple-monitors

我希望能够通过代码设置“将我的Windows桌面扩展到此显示器上”。 PowerShell脚本是理想的。 WMI似乎是前进的方向，但我对WMI知之甚少。

8 个答案:

答案 0 :(得分：21)

Windows 7,8和10应该带有一个小程序，它正是这样做的：displayswitch.exe。 This page列出了以下参数：

displayswitch.exe/internal  Disconnect projector
displayswitch.exe/clone     Duplicate screen
displayswitch.exe/extend    Extend screen
displayswitch.exe/external  Projector only (disconnect local)

对于提出问题的一键式解决方案，只需创建一个包含单行的* .bat文件

call displayswitch.exe/extend

并将其保存到桌面。

[我在Windows 8.1上对此进行了测试，并且已经确认可以在Windows 10上运行。]

答案 1 :(得分：4)

第一个可能的解决方案是......通过GUI（但没有用户交互）

VB script（described here但Autoit语言）：

Option Explicit
Dim WshShell, Dummy, Splash

On Error Resume Next

Set WshShell = WScript.CreateObject("WScript.Shell")

'Main
Call DoIt
WScript.Quit

Sub DoIt
wshshell.Run("%systemroot%\system32\control.exe desk.cpl,@0,3")

' Give Display Properties time to load
WScript.Sleep 1000
WshShell.SendKeys "2"
WScript.Sleep 10
WshShell.SendKeys "%E"
WScript.Sleep 500
WshShell.SendKeys "%A"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{ENTER}"
End Sub 'DoIt

在Autoit中，那将是：

;
; — toggle-screen.au3
;

; exec cpanel app `display settings`
Run(”C:\WINDOWS\system32\control.exe desk.cpl,@0,3?”)

; wait for window to be active
WinWaitActive(”Display Settings”)

; select 2nd display
Send(”{TAB}”)
Send(”{DOWN}”)

; work back to the ‘extend desktop’ control
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)
Send(”+{TAB}”)

; toggle ‘extend desktop’ control and apply
Send(”{SPACE}”)
Send(”{ENTER}”)

; wait for window to be active
WinWaitActive(”Display Settings”)

; accept
Send(”{TAB}”)
Send(”{ENTER}”)

;
; — E.O.F.
;

答案 2 :(得分：3)

在这些设置没有.NET接口的意义上，PowerShell无法直接访问此类操作。很多核心操作系统的东西都是非托管代码，只能通过win32 API调用来操作。虽然您可能会使用WMI，但我搜索了一段时间，但无法找到能够操作此设置的令人满意的WMI类。

下一步是直接修改注册表。看起来设置位于HKLM：\ system \ CurrentControlSet \ control \ video - 某处。我相信这是一个叫做“Attach.ToDesktop”的人。

这是一个部分解决方案，因此我将其标记为社区维基的答案。

我不确定这是正确的注册表项，我目前还没有可以测试多显示器的系统。这样做的目的是确定哪个是主控制器，然后输出Attach.ToDesktop键的值。

param ( 
    $ControllerName = "$( throw 'ControllerName is a mandatory parameter' )"
)
$regPath = "HKLM:\system\CurrentControlSet\control\video"
$devDescStr = "Device Description"

Set-Location -path $regPath
$regSubKey = Get-ChildItem -recurse -include 0000
$devDescProperty = $regSubKey | Get-ItemProperty -name $devDescStr -erroraction SilentlyContinue 
$priDescProperty = $devDescProperty | Where-Object { $_.$devDescStr -match $ControllerName }
Set-Location -path $priDescProperty.PSPath
Get-ItemProperty -path . -name "Attach.ToDesktop"

答案 3 :(得分：3)

我制作了一个不使用sendkeys的更干净的版本。

public class DisplayHelper
{
    [DllImport("user32.dll")]
    static extern DISP_CHANGE ChangeDisplaySettings(uint lpDevMode, uint dwflags);
    [DllImport("user32.dll")]
    static extern bool EnumDisplayDevices(string lpDevice, uint iDevNum, ref DISPLAY_DEVICE lpDisplayDevice, uint dwFlags);

    enum DISP_CHANGE : int
    {
        Successful = 0,
        Restart = 1,
        Failed = -1,
        BadMode = -2,
        NotUpdated = -3,
        BadFlags = -4,
        BadParam = -5,
        BadDualView = -1
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
    struct DISPLAY_DEVICE
    {
        [MarshalAs(UnmanagedType.U4)]
        public int cb;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
        public string DeviceName;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        public string DeviceString;
        [MarshalAs(UnmanagedType.U4)]
        public DisplayDeviceStateFlags StateFlags;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        public string DeviceID;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        public string DeviceKey;
    }

    [Flags()]
    enum DisplayDeviceStateFlags : int
    {
        /// <summary>The device is part of the desktop.</summary>
        AttachedToDesktop = 0x1,
        MultiDriver = 0x2,
        /// <summary>The device is part of the desktop.</summary>
        PrimaryDevice = 0x4,
        /// <summary>Represents a pseudo device used to mirror application drawing for remoting or other purposes.</summary>
        MirroringDriver = 0x8,
        /// <summary>The device is VGA compatible.</summary>
        VGACompatible = 0x16,
        /// <summary>The device is removable; it cannot be the primary display.</summary>
        Removable = 0x20,
        /// <summary>The device has more display modes than its output devices support.</summary>
        ModesPruned = 0x8000000,
        Remote = 0x4000000,
        Disconnect = 0x2000000
    }

    public static void EnableSecondaryDisplay()
    {
        var secondaryIndex = 1;
        var secondary = GetDisplayDevice(secondaryIndex);
        var id = secondary.DeviceKey.Split('\\')[7];

        using (var key = Registry.CurrentConfig.OpenSubKey(string.Format(@"System\CurrentControlSet\Control\VIDEO\{0}", id), true))
        {
            using (var subkey = key.CreateSubKey("000" + secondaryIndex))
            {
                subkey.SetValue("Attach.ToDesktop", 1, RegistryValueKind.DWord);
                subkey.SetValue("Attach.RelativeX", 1024, RegistryValueKind.DWord);
                subkey.SetValue("DefaultSettings.XResolution", 1024, RegistryValueKind.DWord);
                subkey.SetValue("DefaultSettings.YResolution", 768, RegistryValueKind.DWord);
                subkey.SetValue("DefaultSettings.BitsPerPel", 32, RegistryValueKind.DWord);
            }
        }

        ChangeDisplaySettings(0, 0);
    }

    private static DISPLAY_DEVICE GetDisplayDevice(int id)
    {
        var d = new DISPLAY_DEVICE();
        d.cb = Marshal.SizeOf(d);
        if (!EnumDisplayDevices(null, (uint)id, ref d, 0))
            throw new NotSupportedException("Could not find a monitor with id " + id);
        return d;
    }
}

我只在新安装的计算机上测试了这个。 I created a a snippet here if you would like to make changes to it

答案 4 :(得分：1)

这是我用于切换显示器的AutoIt-Script，因为我的ATI显卡不允许我同时激活3个显示器。我有2个显示器和一台电视。这个脚本正在做VonC脚本所做的事情，但是更有效，更快捷。

Run("C:\WINDOWS\system32\control.exe desk.cpl", "C:\Windows\system32\")
WinWait("Screen Resolution")
ControlCommand("Screen Resolution", "", "ComboBox1", "SetCurrentSelection", "SAMSUNG")

if (ControlCommand("Screen Resolution", "", "ComboBox3", "GetCurrentSelection", "") = "Disconnect this display") Then
    ControlCommand("Screen Resolution", "", "ComboBox1", "SetCurrentSelection", "2")
    ControlCommand("Screen Resolution", "", "ComboBox3", "SetCurrentSelection", "3")
    ControlCommand("Screen Resolution", "", "ComboBox1", "SetCurrentSelection", "0")
    ControlCommand("Screen Resolution", "", "ComboBox3", "SetCurrentSelection", "1")
    ControlClick("Screen Resolution", "", "Button4")
    WinWait("Display Settings")
    ControlClick("Display Settings", "", "Button1")
Else
    ControlCommand("Screen Resolution", "", "ComboBox3", "SetCurrentSelection", "3")
    ControlCommand("Screen Resolution", "", "ComboBox1", "SetCurrentSelection", "2")
    ControlCommand("Screen Resolution", "", "ComboBox3", "SetCurrentSelection", "1")
    ControlClick("Screen Resolution", "", "Button4")
    WinWait("Display Settings")
    ControlClick("Display Settings", "", "Button1")
EndIf

只需将“SAMSUNG”替换为您的第三个显示器/电视名称就可以了！ 您肯定知道即使没有安装AutoIt，也可以将其转换为可在任何机器上运行的可执行文件。

答案 5 :(得分：1)

autohotkey中的2行

第二次显示：

RunWait C:\Windows\System32\DisplaySwitch.exe /extend

第二次显示关闭：

RunWait C:\Windows\System32\DisplaySwitch.exe /internal

- 

#NoEnv  ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn  ; Enable warnings to assist with detecting common errors.
SendMode Input  ; Recommended for new scripts due to its superior speed and reliability.
#Persistent 

Any1stKeyUWantToTurnOn::RunWait C:\Windows\System32\DisplaySwitch.exe /extend
Any2stKeyUWantToTurnOff::RunWait C:\Windows\System32\DisplaySwitch.exe /internal

或

您可以在github / BNK3R-Boy / DisplaySwitch上查看并试用我的工具。我现在发表了它。

答案 6 :(得分：0)

我必须进行一些小修改才能让VonC的脚本在我的机器上运行。它现在更通用了。

;
; — toggle-screen2.au3
;

#include <WinAPI.au3>
; exec cpanel app `display settings`
Run(_WinAPI_ExpandEnvironmentStrings("%windir%") & "\system32\control.exe desk.cpl,@0,3?")

; wait for window to be active
WinWaitActive("Display Properties")

; select 2nd display
Send("!d")
Send("{DOWN}")

; toggle the ‘extend desktop’ checkbox
Send("!e")

; close the dialog
Send("{ENTER}")

答案 7 :(得分：-1)

Windows键+ P按钮将执行相同的操作

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