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POWP7 read file from phone
 

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    <p>I am building an app on Windows Phone 7 to transfer photos on wifi.</p> <p>Firs the user select photos (that works fine) &amp; I store paths in variable that I can use later.</p> <p>When I am trying to send photo, I've got null on my stream like shown below: To be specific, I launch the next photo transfer when the progress bar has changed, so threads are not concurrent.</p> <pre><code>public transferPage() { InitializeComponent(); // Get smartphone unique ID object DeviceUniqueID; byte[] DeviceIDbyte = null; if (DeviceExtendedProperties.TryGetValue("DeviceUniqueId", out DeviceUniqueID)) DeviceIDbyte = (byte[])DeviceUniqueID; deviceId = Convert.ToBase64String(DeviceIDbyte); nbPhotos = photoContainer.photosUri.Count; photoContainer.index = 0; index = 0; transferPhoto(); } private void ProgressBarValueChanged(object sender, RoutedPropertyChangedEventArgs&lt;double&gt; e) { Thread.Sleep(3000); if (photoContainer.photosUri.Count &gt; 0) transferPhoto(); } private void transferPhoto() { string url = String.Format(photoContainer.urlTransfer, nbPhotos, deviceId); HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url); webRequest.Method = "POST"; webRequest.ContentType = "application/x-www-form-urlencoded"; webRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), webRequest); } private void GetRequestStreamCallback(IAsyncResult asynchronousResult) { HttpWebRequest webRequest = (HttpWebRequest)asynchronousResult.AsyncState; // End the stream request operation Stream postStream = webRequest.EndGetRequestStream(asynchronousResult); var fs = Application.GetResourceStream(new Uri(photoContainer.photosUri[0], UriKind.RelativeOrAbsolute)).Stream; </code></pre> <p>A is Null exception is raised on the last line. It is never raised on the first file, sometimes the second and always the third. photoContainer.photosUri[0] still a good file path which I confirmed in the debugger. </p>
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    1. USKara
    1. USWeezzZ
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    1. COMmmm, posted on msdn forum, they ask questions, but do not know...
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    2. COCan you state if it is a null reference exception or another type of null exception?
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      1. USRobert MacLean
 

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