how to map StreamResourceinfo to a absolute URL - silverlight

Question

I am using the below snipped to save an audio file in the isolated storage. but the exception occurs when streamresourceinfo mapped to a absoluteUri. The uri accepts only the relative uri. Please guide me how to save the audio file using absolute Uri.
private void SaveMp3()
{
string FileName = "Audios/Deer short.mp3";
FileName = "http://www.ugunaflutes.co.uk/Deer short.mp3";
StreamResourceInfo streamResourceInfo = Application.GetResourceStream(new Uri(FileName, UriKind.RelativeOrAbsolute));
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists(FileName))
{
myIsolatedStorage.DeleteFile(FileName);
}
using (IsolatedStorageFileStream fileStream = new IsolatedStorageFileStream("Audio.png", FileMode.Create, myIsolatedStorage))
{
using (BinaryWriter writer = new BinaryWriter(fileStream))
{
Stream resourceStream = streamResourceInfo.Stream;
long length = resourceStream.Length;
byte[] buffer = new byte[32];
int readCount = 0;
using (BinaryReader reader = new BinaryReader(streamResourceInfo.Stream))
{
// read file in chunks in order to reduce memory consumption and increase performance
while (readCount < length)
{
int actual = reader.Read(buffer, 0, buffer.Length);
readCount += actual;
writer.Write(buffer, 0, actual);
}
}
}
}
}
}
Thanks in advance.

Answer 1

You can't use Application.GetResourceStream to load an external resource, because URI must to be relative to the application package http://msdn.microsoft.com/en-us/library/ms596994(v=vs.95).aspx.
You need to use WebClient.OpenReadAsync to download your mp3 file and after save it locally to IsolatedStorage, peace of example:
var webClient = new WebClient();
webClient.OpenReadCompleted += (sender, args) =>
{
if (args.Error != null)
{
//save file here
}
};
webClient.OpenReadAsync(new Uri("http://www.ugunaflutes.co.uk/Deer short.mp3"));