Counting number of files from folder on Windows Phone - windows-phone-7

Question

I have a folder with a number of .wav files inside. I need to dynamically count these files in order to generate the sound in a random way. I need this dynamically, so I don't need to update code everytime I update the sound folder with another sound.
I searched how to do it, but could only found examples for Windows. Here's the code I came up with:
string path = string.Format("/Sound/{0}", sourceSound);
return Directory.GetFiles(path, ".wav").Length;
I tried running it, but VS gives me the error:
"Unable to step. The code is currently unavailable."
Is there anything I'm doing wrong, or any other case how can we count the number of files inside a folder?
Thanks.

Answer 1

Try
using (var myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
var i = myIsolatedStorage.GetFileNames("*.wav").Length;
}

Answer 2

For some reason I couldn't make the example Vitalii gave me work. I was never able to get the count of files I have in the volder.
Looking over the internet, I stumbled upon this link:
confused about resources and GetManifestResourceNames()
The answer Zack gave on this thread, gave the insight I needed to make my App work.
I used Embedded Resource to find all the count of files I needed and, then, play the with a SoundEffectInstance.
The following link helped on this:
http://matthiasshapiro.com/2011/01/10/embedding-a-sound-file-in-windows-phone-7-app-silverlight/
Here's how I managed to make it work:
soundCount = GetSoundCount();
private int GetSoundCount()
{
return Assembly.GetExecutingAssembly().GetManifestResourceNames().Where(name => name.Contains(sourceImg)).Count();
}
With these few lines I managed to get the exact number of files I have in my App.
To make the sound play, I used the second link as an example and produced the code below:
if(soundInstance != null)
soundInstance.Stop();
this.soundInstance = SetNextSource();
soundInstance.Play();
private SoundEffectInstance SetNextSource()
{
Random random = new Random();
Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
Stream stream = assembly.GetManifestResourceStream(string.Format("Assembly Name.Folder.{0}.{1}.wav", SubFolder, FileName + random.Next(soundCount)));
SoundEffect se = SoundEffect.FromStream(stream);
return se.CreateInstance();
}
Well after a few days o research finally managed to make it work.
Hope this thread helps people facing the same problem I did.
Thanks.