private static BitmapImage DownloadFromWeb(Uri uri, string filename)
{
var webClient = new WebClient();
var bm = new BitmapImage();
webClient.OpenReadCompleted += (o, e) =>
{
if (e.Error != null || e.Cancelled)
{
return;
}
using (var inputStream = e.Result)
{
IsolatedStorage.WriteToFile(filename, outputStream =>
{
byte[] buffer = new byte[32768];
int read;
while ((read = inputStream.Read(buffer, 0, buffer.Length)) > 0)
{
outputStream.Write(buffer, 0, read);
}
});
using (var stream = IsolatedStorage.OpenFileToRead(filename))
{
bm.SetSource(stream);
}
}
};
webClient.OpenReadAsync(uri);
return(bm);
}
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
var uri = new Uri((string)value);
if (uri.Scheme == "http" || uri.Scheme == "https")
{
var filename = CacheFolder + "/" + uri.AbsoluteUri.GetHashCode() + ".img";
try
{
if (IsolatedStorage.FileExists(filename))
{
var bm = new BitmapImage();
using (var stream = IsolatedStorage.OpenFileToRead(filename))
{
bm.SetSource(stream);
}
return(bm);
}
else
{
return(DownloadFromWeb(uri, filename));
}
}
catch
{
// crashes in the VS preview when trying to access isolated storage
return(new BitmapImage(uri));
}
}
else
{
return(new BitmapImage(uri));
}
}
public static void ReportException(Exception ex, string header)
{
try
{
var content = "[" + ToString(DateTime.UtcNow) + "]" + " " + header;
if (ex != null)
{
content += "\n" + ex.ToString();
}
content += "\n";
IsolatedStorage.AppendText(ErrorReportFile, content);
}
catch { }
}
public static void CheckForPreviousException(bool startingUp)
{
string contents = null;
try
{
contents = IsolatedStorage.ReadAllText(ErrorReportFile);
IsolatedStorage.Delete(ErrorReportFile);
}
catch { }
if (contents != null)
{
var text = "A problem occurred" + (startingUp ? " the last time you ran this application" : "") + ". Would you like to send an email to report it?";
if (Extensions.ShowMessageBox("Problem Report", text, "Send report", "No thanks"))
{
var email = new EmailComposeTask();
email.To = AppMetadata.Current.Email;
email.Subject = AppMetadata.Current.Name + " " + AppMetadata.Current.Version + " auto-generated problem report";
email.Body = GetMailBody(contents);
email.Show();
}
}
}