C# - 检查 Windows10 上是否安装了 UWP 应用

Question

Question : Using C# how can we check if a UWP application is installed on Windows 10`

Possible Goal : My real motivation is to develop an MS Office app in VS2017 using Microsoft.Office.Interop that interacts with a UWP app like this one explained here . But the office app would first check if the required UWP app is installed or not.

For the old Windows 32bit and 64bit apps, we could check if an application is installed using various methods such as the following. I was wondering if there is something similar for UWP on Windows 10:

private static bool IsSoftwareInstalled(string softwareName)
{
    var key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall") ??
              Registry.LocalMachine.OpenSubKey(
                  @"SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall");

    if (key == null)
        return false;

    return key.GetSubKeyNames()
        .Select(keyName => key.OpenSubKey(keyName))
        .Select(subkey => subkey.GetValue("DisplayName") as string)
        .Any(displayName => displayName != null && displayName.Contains(softwareName));
}

Then use an if statement to call it:

if (IsSoftwareInstalled("OpenSSL"))

Answer 1

You can call the PackageManager.FindPackageForUser API from the Win32 app to check if the UWP is installed for the current user.

https://docs.microsoft.com/en-us/uwp/api/windows.management.deployment.packagemanager.findpackageforuser

Answer 2

as I didn't have access to the UWP PackageManager api I actually just did a simple directory check

var appPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Packages", "YourAppId");            

if (Directory.Exists(appPath))
{
    //exists
 }