private void btnSearch_Click(object sender, RoutedEventArgs e)
{
string address = txtAddressName.Text.Trim();
if (string.IsNullOrEmpty(address))
{
MessageBox.Show("Please enter address.");
return;
}
// Initialize geocoder
Geocoder streetGeocoder = new Geocoder();
streetGeocoder.MatchingPlugIns.Add(new StreetMatchingPlugin(@"..\..\Data\GeoCoderIndex", MatchMode.ExactMatch));
try
{
streetGeocoder.Open();
// Get the ShapeFileFeatureLayer which includes the street data.
FeatureLayer roadFeatureLayer = ((LayerOverlay)Map1.Overlays[roadOverlayName]).Layers[0] as FeatureLayer;
roadFeatureLayer.Open();
// Get the marker overlay to display the searched results.
SimpleMarkerOverlay markerOverlay = Map1.Overlays[markerOverlayName] as SimpleMarkerOverlay;
markerOverlay.Markers.Clear();
Collection <SearchResult> searchedResult = new Collection <SearchResult>();
// Geocoder the address input, such as "6701 PECAN".
Collection <GeocoderMatch> matchedRoads = streetGeocoder.Match(address);
Proj4Projection projection = new Proj4Projection();
projection.InternalProjectionParametersString = Proj4Projection.GetWgs84ParametersString();
projection.ExternalProjectionParametersString = "+proj=lcc +lat_1=32.1333333333333 +lat_2=33.9666666666667 +lat_0=31.6666666666667 +lon_0=-98.5 +x_0=600000 +y_0=2000000 +ellps=GRS80 +datum=NAD83 +units=us-ft +no_defs";
projection.Open();
foreach (GeocoderMatch geocoderMatched in matchedRoads)
{
// Display the searched result as marker.
BaseShape streetCenter = new Feature(geocoderMatched.NameValuePairs["CentroidPoint"]).GetShape();
PointShape center = projection.ConvertToExternalProjection(streetCenter) as PointShape;
markerOverlay.Markers.Add(new Marker(center)
{
ImageSource = new BitmapImage(new Uri("/Resources/AQUA.png", UriKind.RelativeOrAbsolute)),
Width = 20,
Height = 34,
YOffset = -17,
ToolTip = geocoderMatched.NameValuePairs["Street"]
});
// Get the feature id of the street where the searched result locates.
string featureId = geocoderMatched.NameValuePairs["UID"];
// Get the street where the searched result locates.
Feature feature = roadFeatureLayer.QueryTools.GetFeatureById(featureId, new[] { "ROAD_NAME" });
searchedResult.Add(GetSearchResult(feature, geocoderMatched));
}
projection.Close();
roadFeatureLayer.Close();
searchResults.ItemsSource = searchedResult;
// Set the highlight layer into the current extent.
InMemoryFeatureLayer highlightRoadLayer = ((LayerOverlay)Map1.Overlays[roadHighlightOverlayName]).Layers[0] as InMemoryFeatureLayer;
if (highlightRoadLayer.InternalFeatures.Count > 0)
{
Map1.CurrentExtent = highlightRoadLayer.GetBoundingBox();
Map1.ZoomOut();
}
Map1.Refresh();
}
finally
{
streetGeocoder.Close();
}
}