WebClient.DownloadStringAsync webexception wp7 - windows-phone-7

Question

I'm trying to remove a node from an xml file, everything works, but sometimes it happens that the xml web page does not load. this is my code:
private void HttpsCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XDocument xdoc = XDocument.Parse(e.Result, LoadOptions.None);
if (e.Error == null)
{
XDocument doc = XDocument.Parse(e.Result, LoadOptions.None);
var lyric = doc.Descendants(XName.Get("Lyric", "http://api.chartlyrics.com/")).FirstOrDefault();
TextBlock1.Text = lyric.Value;
}
}
}
private void btnLoad_Click(object sender, RoutedEventArgs e)
{
WebClient wc = new WebClient();
wc.DownloadStringCompleted += HttpsCompleted;
wc.DownloadStringAsync(new Uri("http://api.chartlyrics.com/apiv1.asmx/SearchLyricDirect?artist=michael%20jackson&song=bad));
}
I' ve read to use the WebException to handle this "mistake" but I am not able to use it. can someone give me some help?

Answer 1

Have you tried this way?
private void btnLoad_Click(object sender, RoutedEventArgs e)
{
try
{
WebClient wc = new WebClient();
wc.DownloadStringCompleted += HttpsCompleted;
wc.DownloadStringAsync(new Uri("http://api.chartlyrics.com/apiv1.asmx/SearchLyricDirect?artist=michael%20jackson&song=bad"));
}
catch (WebException ex)
{
// Check the exception here
}
}
And check for error in the handler too:
private void HttpsCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error == null)
{
XDocument xdoc = XDocument.Parse(e.Result, LoadOptions.None);
if (e.Error == null)
{
XDocument doc = XDocument.Parse(e.Result, LoadOptions.None);
var lyric = doc.Descendants(XName.Get("Lyric", "http://api.chartlyrics.com/")).FirstOrDefault();
TextBlock1.Text = lyric.Value;
}
}
else
{
// Check for error here
}
}
I realized it sometimes return Error, and I think the problem is in the server, because if I access it from the web browser, I sometimes get the result, but many times I get an error.