.net – how to get and set audio volume level for a Universal Windows application

audioiotnetuwpvb.net

The title says it all, I would like to get and set audio volume level for a Universal Windows (iot) application.

It can be either the sound level associated with my particular application – which would be ideal; or it can be the system sound level – if necessary / possible.

I am using visual studio 2015

I've been searching for examples / samples but have come up dry.

Any help would be appreciated.

(of note this is not a duplicate question – I want to get and set audio volume level for a Universal Windows application – this can not be done via a COM object in uwp – nor do uwp apps use VBScript or JScript)

Best Answer

There's no need to make a WinRT component. Instead you can use P/Invoke to access the win32 audio interfaces.

Take a look at my code (Gist) for how to do this in C#.

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System.Reflection.Assembly.GetExecutingAssembly().Location¹

Combine that with System.IO.Path.GetDirectoryName if all you want is the directory.

¹As per Mr.Mindor's comment:
System.Reflection.Assembly.GetExecutingAssembly().Location returns where the executing assembly is currently located, which may or may not be where the assembly is located when not executing. In the case of shadow copying assemblies, you will get a path in a temp directory. System.Reflection.Assembly.GetExecutingAssembly().CodeBase will return the 'permanent' path of the assembly.

Ios – How to get audio volume level, and volume changed notifications on iOS

Any chance you did your signature wrong for the volumeChanged: method? This worked for me, dumped in my appdelegate:

- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [[NSNotificationCenter defaultCenter]
     addObserver:self
     selector:@selector(volumeChanged:)
     name:@"AVSystemController_SystemVolumeDidChangeNotification"
     object:nil];
}

- (void)volumeChanged:(NSNotification *)notification
{
    float volume =
    [[[notification userInfo]
      objectForKey:@"AVSystemController_AudioVolumeNotificationParameter"]
     floatValue];

    // Do stuff with volume
}

My volumeChanged: method gets hit every time the button is pressed, even if the volume does not change as a result (because it's already at max/min).

Best Answer

Related Solutions

C# – How to get the application’s path in a .NET console application

Ios – How to get audio volume level, and volume changed notifications on iOS

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