/// <summary>
/// Handler called when the request for a location's coordinates returns.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ReceivedLocationCoordinates(object sender, OpenReadCompletedEventArgs e)
{
if (e.Cancelled)
{
return;
}
if (e.Error != null)
{
if (!Guide.IsVisible)
{
Guide.BeginShowMessageBox("Error focusing on location", e.Error.Message, new string[] { "OK" },
0, MessageBoxIcon.Error, null, null);
}
return;
}
GeoCoordinate receivedCoordinate;
try
{
// Parse the response XML to get the location's geo-coordinate
XDocument locationResponseDoc = XDocument.Load(e.Result);
XNamespace docNamespace = locationResponseDoc.Root.GetDefaultNamespace();
var locationNodes = locationResponseDoc.Descendants(XName.Get("Location", docNamespace.NamespaceName));
if (locationNodes.Count() == 0)
{
Guide.BeginShowMessageBox("Invalid location",
"The requested location was not recognized by the system.", new string[] { "OK" },
0, MessageBoxIcon.Error, null, null);
return;
}
XElement pointNode = locationNodes.First().Descendants(
XName.Get("Point", docNamespace.NamespaceName)).FirstOrDefault();
if (pointNode == null)
{
Guide.BeginShowMessageBox("Invalid location result", "The location result is missing data.",
new string[] { "OK" }, 0, MessageBoxIcon.Error, null, null);
return;
}
XElement longitudeNode = pointNode.Element(XName.Get("Longitude", docNamespace.NamespaceName));
XElement latitudeNode = pointNode.Element(XName.Get("Latitude", docNamespace.NamespaceName));
if (longitudeNode == null || latitudeNode == null)
{
Guide.BeginShowMessageBox("Invalid location result", "The location result is missing data.",
new string[] { "OK" }, 0, MessageBoxIcon.Error, null, null);
return;
}
receivedCoordinate = new GeoCoordinate(double.Parse(latitudeNode.Value),
double.Parse(longitudeNode.Value));
}
catch (Exception err)
{
Guide.BeginShowMessageBox("Error getting location coordinates", err.Message, new string[] { "OK" },
0, MessageBoxIcon.Error, null, null);
return;
}
bingMapsViewer.CenterOnLocation(receivedCoordinate);
}
