为了记录在案，PowerShell代码是：

Get-WmiObject -Class Win32_DesktopMonitor | Select-Object ScreenWidth,ScreenHeight

我在横向或纵向模式中得到相同的值。

更新：

在多显示器环境中，您可以使用以下命令获取所有显示器的信息：

PS> Add-Type -AssemblyName System.Windows.Forms
PS> [System.Windows.Forms.Screen]::AllScreens

BitsPerPixel : 32
Bounds       : {X=0,Y=0,Width=1280,Height=800}
DeviceName   : \\.\DISPLAY1
Primary      : True
WorkingArea  : {X=0,Y=0,Width=1280,Height=770}

BitsPerPixel : 32
Bounds       : {X=1280,Y=0,Width=1920,Height=1200}
DeviceName   : \\.\DISPLAY2
Primary      : False
WorkingArea  : {X=1280,Y=0,Width=1920,Height=1170}

你可以从Win32_VideoController WMI类中获取它。VideoModeDescription属性包括屏幕分辨率和颜色深度。

(Get-WmiObject -Class Win32_VideoController).VideoModeDescription;

结果

1600 x 900 x 4294967296 colors

与其他答案相同，但对于普通cmd：
wmic path Win32_VideoController get VideoModeDescription

@Shay Levy上面的答案准确地报告了启动powershell会话时活动的宽度/高度。如果您在PS启动后旋转显示器，它将继续报告原来的值，但现在不正确。

SystemInformation类提供了另一种获取方向的方法，即使在会话启动后旋转显示器，它也会在当前PS会话中更改。

Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.SystemInformation]::ScreenOrientation
Angle0

[System.Windows.Forms.SystemInformation]::PrimaryMonitorSize
IsEmpty                            Width                           Height
-------                            -----                           ------
False                              1680                             1050

然后旋转显示器。..

[System.Windows.Forms.SystemInformation]::ScreenOrientation
Angle90

[System.Windows.Forms.SystemInformation]::PrimaryMonitorSize
IsEmpty                            Width                           Height
-------                            -----                           ------
False                              1050                             1680

https://msdn.microsoft.com/en-us/library/system.windows.forms.systeminformation(v=vs.110).aspx

这里有一个基于Shays的答案，只是它按照OP的例子格式化每个屏幕的结果。

PowerShell代码，格式化结果：[System.Windows.Forms.Screen]::AllScreens

Add-Type -AssemblyName System.Windows.Forms
$screen_cnt  = [System.Windows.Forms.Screen]::AllScreens.Count
$col_screens = [system.windows.forms.screen]::AllScreens

$info_screens = ($col_screens | ForEach-Object {
if ("$($_.Primary)" -eq "True") {$monitor_type = "Primary Monitor    "} else {$monitor_type = "Secondary Monitor  "}
if ("$($_.Bounds.Width)" -gt "$($_.Bounds.Height)") {$monitor_orientation = "Landscape"} else {$monitor_orientation = "Portrait"}
$monitor_type + "(Bounds)                          " + "$($_.Bounds)"
$monitor_type + "(Primary)                         " + "$($_.Primary)"
$monitor_type + "(Device Name)                     " + "$($_.DeviceName)"
$monitor_type + "(Bounds Width x Bounds Height)    " + "$($_.Bounds.Width) x $($_.Bounds.Height) ($monitor_orientation)"
$monitor_type + "(Bits Per Pixel)                  " + "$($_.BitsPerPixel)"
$monitor_type + "(Working Area)                    " + "$($_.WorkingArea)"
}
)

Write-Host "TOTAL SCREEN COUNT: $screen_cnt"
$info_screens

副显示器横向模式输出。1920 x 1200

# TOTAL SCREEN COUNT: 2
# Primary Monitor    (Bounds)                          {X=0,Y=0,Width=2560,Height=1600}
# Primary Monitor    (Primary)                         True
# Primary Monitor    (Device Name)                     \\.\DISPLAY1
# Primary Monitor    (Bounds Width x Bounds Height)    2560 x 1600 (Landscape)
# Primary Monitor    (Bits Per Pixel)                  32
# Primary Monitor    (Working Area)                    {X=0,Y=0,Width=2560,Height=1560}
# Secondary Monitor  (Bounds)                          {X=2560,Y=0,Width=1920,Height=1200}
# Secondary Monitor  (Primary)                         False
# Secondary Monitor  (Device Name)                     \\.\DISPLAY2
# Secondary Monitor  (Bounds Width x Bounds Height)    1920 x 1200 (Landscape)
# Secondary Monitor  (Bits Per Pixel)                  32
# Secondary Monitor  (Working Area)                    {X=2560,Y=0,Width=1920,Height=1160}

纵向模式下辅助显示器的输出。1200 x 1920

# TOTAL SCREEN COUNT: 2
# Primary Monitor    (Bounds)                          {X=0,Y=0,Width=2560,Height=1600}
# Primary Monitor    (Primary)                         True
# Primary Monitor    (Device Name)                     \\.\DISPLAY1
# Primary Monitor    (Bounds Width x Bounds Height)    2560 x 1600 (Landscape)
# Primary Monitor    (Bits Per Pixel)                  32
# Primary Monitor    (Working Area)                    {X=0,Y=0,Width=2560,Height=1560}
# Secondary Monitor  (Bounds)                          {X=2560,Y=0,Width=1200,Height=1920}
# Secondary Monitor  (Primary)                         False
# Secondary Monitor  (Device Name)                     \\.\DISPLAY2
# Secondary Monitor  (Bounds Width x Bounds Height)    1200 x 1920 (Portrait)
# Secondary Monitor  (Bits Per Pixel)                  32
# Secondary Monitor  (Working Area)                    {X=2560,Y=0,Width=1200,Height=1880}

您可以使用以下命令获得所有可用的分辨率：

$Query = "SELECT * FROM CIM_VideoControllerResolution"
$res = Get-WMIObject -query $Query | Select Caption

对于Short，这将分别获得第一个屏幕（如果有很多）的宽度和高度

$height = (((Get-WmiObject -Class Win32_VideoController).VideoModeDescription  -split '\n')[0]  -split ' ')[2]
$width = (((Get-WmiObject -Class Win32_VideoController).VideoModeDescription  -split '\n')[0]  -split ' ')[0]