How can my UWP app gain the necessary permission/s to initiate a shutdown?

Question

I wish to add to my UWP application the ability for it to shut-down its local machine upon invocation by a button click, however, no method that I have tried thus far has worked. For instance:

I have tried to command Windows to shut-down, but the command that I utilised does not work specifically when invoked by my application.

shutdown /s /t 120

Therefore, I tried to use native C# code in order to do so. However, using this tells me that it does not possess the appropriate permissions to do so.

ShutdownManager.BeginShutdown(Windows.System.ShutdownKind.Shutdown, TimeSpan.FromSeconds(120));

I have tried many methods but I simply cannot seem to fix it.

Relevant files

MainPage.xaml.cs

using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using System;
using Windows.System;

// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409.
// Delete the extra namespaces when the application is complete.

namespace Shutdown_Roulette
{
    /// <summary>
    /// An empty page that can be used on its own or navigated to within a Frame.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private void Button_click(object sender, RoutedEventArgs e)
        {
            ShutdownManager.BeginShutdown(Windows.System.ShutdownKind.Shutdown, TimeSpan.FromSeconds(120));
        }
    }
}

Package.appxmanifest

<?xml version="1.0" encoding="utf-8"?>

<Package
  xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
  xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
  xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
  xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10"
  IgnorableNamespaces="uap mp iot">

  <Identity
    Name="7eb73f1e-b159-4fd0-aab9-4158e57ba08a"
    Publisher="CN=rokeb"
    Version="1.0.0.0" />

  <mp:PhoneIdentity PhoneProductId="7eb73f1e-b159-4fd0-aab9-4158e57ba08a" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>

  <Properties>
    <DisplayName>Shutdown Roulette</DisplayName>
    <PublisherDisplayName>Master Roke Julian Lockhart Beedell</PublisherDisplayName>
    <Logo>Assets\StoreLogo.png</Logo>
  </Properties>

  <Dependencies>
    <TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
  </Dependencies>

  <Resources>
    <Resource Language="x-generate"/>
  </Resources>

  <Applications>
    <Application Id="App"
      Executable="$targetnametoken$.exe"
      EntryPoint="Shutdown_Roulette.App">
      <uap:VisualElements
        DisplayName="Shutdown Roulette"
        Square150x150Logo="Assets\Square150x150Logo.png"
        Square44x44Logo="Assets\Square44x44Logo.png"
        Description="Shutdown Roulette"
        BackgroundColor="transparent">
        <uap:DefaultTile Wide310x150Logo="Assets\Wide310x150Logo.png" ShortName="Shutdown Roulette">
        </uap:DefaultTile >
        <uap:SplashScreen Image="Assets\SplashScreen.png" />
      </uap:VisualElements>
    </Application>
  </Applications>

  <Capabilities>
    <iot:Capability Name="systemManagement"/></Capabilities>
</Package>

Please note that I wish to use this command on Windows 10, not Windows 10 IoT; I merely am trying to use those commands because they're the only other way I can think of doing this without relying upon either PowerShell, Python or the Windows Command Processor/Command Prompt.

Richard Zhang - MSFT Richard Zhang - MSFT · Accepted Answer · 2020-11-12T11:35:23

According to the description of ShowdownManager, it needs the support of IOT SDK, which means it is a platform-limited API (only valid on IOT devices).

In Windows 10 desktop devices, UWP does not have the permission to turn off the device.

How can my UWP app gain the necessary permission/s to initiate a shutdown?

Relevant files

MainPage.xaml.cs

Package.appxmanifest

1 Answers