URI Prefix not supported

Question

I am trying to load and play a wave file using:

SoundPlayer simpleSound = new SoundPlayer(@"pack://application:,,,/MyAssembly;component/Sounds/10meters.wav");
            simpleSound.Play();

With no success. I get a System.NotSupportedException :( see below.

System.NotSupportedException: The URI prefix is not recognized.
   at System.Net.WebRequest.Create(Uri requestUri, Boolean useUriBase)
   at System.Net.WebRequest.Create(Uri requestUri)
   at System.Media.SoundPlayer.LoadSync()
   at System.Media.SoundPlayer.LoadAndPlay(Int32 flags)
   at System.Media.SoundPlayer.Play()

I looked over google and SO trying to find a solution, nothing worked. Playing the file with a direct path works fine

SoundPlayer simpleSound = new SoundPlayer(@"D:\Projects\MyAssembly\Sounds\10meters.wav");
simpleSound.Play();

I also checked MyAssembly content, the resource is there. Does SoundPlayer not support packing or there anything I am not doing correctly?

score 6 · Accepted Answer · answered Dec 01 '11 at 16:17

6

The pack:// URI scheme is specific to WPF, so non-WPF components don't know how to handle it... however, you can retrieve a stream for this resource, and pass it to the SoundPlayer constructor:

Uri uri = new Uri(@"pack://application:,,,/MyAssembly;component/Sounds/10meters.wav");
StreamResourceInfo sri = Application.GetResourceStream(uri);
SoundPlayer simpleSound = new SoundPlayer(sri.Stream);
simpleSound.Play();

Another option is to use the MediaPlayer class:

Uri uri = new Uri(@"pack://application:,,,/MyAssembly;component/Sounds/10meters.wav");
MediaPlayer player = new MediaPlayer();
player.Open(uri);
player.Play();

This class supports the pack:// URI scheme

answered Dec 01 '11 at 16:17

Thomas Levesque

286,951
70
623
758

Good call on the stream constructor. – H.B. Dec 01 '11 at 16:18
+1 thanks. `StreamResourceInfo sri = Application.GetResourceStream(uri);` did not work as I am doing this from a dll file not the main exe application. MediaPlayer is too heavy for what I am doing :( Any other ideas? – GETah Dec 01 '11 at 16:46
1

What do you mean, "did not work"? You just need to add a reference to PresentationFramework. There's no way to access a resource with a pack URI independently from WPF, if that's what you're trying to do... – Thomas Levesque Dec 01 '11 at 17:01
Damn me, completely forgot to reference PresentationFramework. Thanks a lot for the pointer – GETah Dec 01 '11 at 21:46
@ThomasLevesque Thanks for the awesome answer. I tried both your solutions. Using StreamResourceInfo with SoundPlayer worked. But using MediaPlayer doesnot. No sound is played when I use MediaPlayer. Both solutions are referring to the exact same URI in my project. I tuned the MediaPlayer's volume to max and still cannot get any sound. – Frank Liu Sep 02 '14 at 00:39

score 1 · Answer 2 · answered Dec 01 '11 at 16:14

F1 is your friend (in VS 2010 at least):

The string passed to the soundLocation parameter can be either a file path or a URL to a .wav file.

URIs are not URLs (unlike the other way around), this will not work. You could save the file to temporary folder on disk if you need to.

URI Prefix not supported

2 Answers2

Linked