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Operation not permitted on IsolatedStorageFileStream: Visual Studio 2010 Express for Phone

Question:

I am having this error: "Operation not permitted on IsolatedStorageFileStream." I am using visual studio 2010 express for phone c#.

Here is my code:

public void LoadData() { string xmlUrl = "http://datastore.unm.edu/events/events.xml"; using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication()) { using (var isoFileStream = new IsolatedStorageFileStream(xmlUrl, FileMode.Open, FileAccess.ReadWrite, FileShare.Read, storage)) { using (XmlReader xreader = XmlReader.Create(isoFileStream)) { } } } }

Thank you for your help! It's much appreciated.

Answer1:

if you want to read a xml from the web you should use the WebClient class. WebClient provides common methods for sending data to and receiving data from a resource identified by a URI.

Here's a little example

private WebClient webClient; public Example() { webClient.DownloadStringCompleted += new DownloadStringCompletedEventHandler(DownloadStringCompleted); webClient.DownloadStringAsync(new Uri("http://datastore.unm.edu/events/events.xml", UriKind.Absolute)); } private void DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e) { XElement Xmlparse = XElement.Parse(e.Result); }

as you can see we use DownloadStringCompletedHandler that occurs when an asynchronous resource-download operation completes.

Finally to parse the XML you can use XElement class <a href="http://www.dotnetperls.com/xelement" rel="nofollow">more informartion here</a>

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