BingRouteCalculatedEventHandler Delegate
A method that will handle the BingRouteDataProvider.RouteCalculated event.
Namespace: DevExpress.XtraMap
Assembly: DevExpress.XtraMap.v22.1.dll
Declaration
public delegate void BingRouteCalculatedEventHandler(
object sender,
BingRouteCalculatedEventArgs e
);Parameters
| Name | Type | Description |
|---|---|---|
| sender | Object | The event source. |
| e | BingRouteCalculatedEventArgs | A BingRouteCalculatedEventArgs object that contains event data. |
Remarks
When creating a BingRouteCalculatedEventHandler delegate, you identify the method that will handle the corresponding event. To associate an event with your event handler, add a delegate instance to this event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates in MSDN.
Example
This example demonstrates how to calculate routes to the destination point from major roads. For this do the following.
- To calculate routes from major roads the BingRouteDataProvider.CalculateRoutesFromMajorRoads method should be called. In this example it is called in the Calculate Routes From Major Roads button click event handler.
- To process request result the BingRouteDataProvider.RouteCalculated event should be handled. The requested results contain the total distance of a route, itinerary item (BingRouteResult.Distance, BingRouteLeg.Distance, BingItineraryItem.Distance), the time required to follow the calculated route (BingRouteResult.Time) and pass the route leg and itinerary item (BingRouteLeg.Time, BingItineraryItem.Time). You can also see the maneuvers associated with the itinerary item (BingItineraryItem.Maneuver) and other parameters.
- To customize map items generated by the BingRouteDataProvider object (because the InformationDataProviderBase.GenerateLayerItems property value is true by default) the InformationDataProviderBase.LayerItemsGenerating event should be handled.
Note
Refer to How to: Get a Bing Maps Key if you run the application and see a window with the following error message: “The specified Bing Maps key is invalid. To create a developer account, refer to https://www.microsoft.com/en-us/maps/create-a-bing-maps-key“.
using System;
using System.ComponentModel;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using DevExpress.XtraMap;
namespace CalculateRoutesFromMajorRoads {
public partial class Form1 : Form {
const double minLat = -90;
const double maxLat = 90;
const double minLon = -180;
const double maxLon = 180;
const string yourBingKey = "Insert Your Bing Key Here";//"Your Bing Key";
double lat = 40;
double lon = -120;
BingRouteDataProvider routeProvider;
public Form1() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
imageProvider.BingKey = yourBingKey;
routeProvider = new BingRouteDataProvider { BingKey = yourBingKey };
routeProvider.LayerItemsGenerating += OnLayerItemsGenerating;
routeProvider.RouteCalculated += OnRouteCalculated;
informationLayer.DataProvider = routeProvider;
informationLayer.DataRequestCompleted += OnDataRequestCompleted;
teLatitude.Text = lat.ToString();
teLongitude.Text = lon.ToString();
#region #InitBingRouteOptions
cbeTravelMode.Properties.Items.AddRange(Enum.GetValues(typeof(BingTravelMode)));
cbeTravelMode.SelectedIndex = 0;
cbeRouteOptimization.Properties.Items.AddRange(Enum.GetValues(typeof(BingRouteOptimization)));
cbeRouteOptimization.SelectedIndex = 0;
#endregion #InitBingRouteOptions
}
#region #LayerItemsGenerating
void OnLayerItemsGenerating(object sender, LayerItemsGeneratingEventArgs e) {
foreach(MapItem item in e.Items) {
MapPolyline polyline = item as MapPolyline;
if(polyline != null) {
polyline.Stroke = Color.FromArgb(0xFF, 0x00, 0x72, 0xC6);
polyline.StrokeWidth = 4;
}
}
}
#endregion #LayerItemsGenerating
#region #DataRequestCompleted
void OnDataRequestCompleted(object sender, RequestCompletedEventArgs e) {
mapControl.ZoomToFitLayerItems(0.4);
}
#endregion #DataRequestCompleted
#region #BingRouteOptionsChanged
private void OnTravelModeSelectedIndexChanged(object sender, EventArgs e) {
routeProvider.RouteOptions.Mode = (BingTravelMode)cbeTravelMode.SelectedItem;
}
private void OnRouteOptimizationSelectedIndexChanged(object sender, EventArgs e) {
routeProvider.RouteOptions.RouteOptimization = (BingRouteOptimization)cbeRouteOptimization.SelectedItem;
}
#endregion #BingRouteOptionsChanged
void ShowErrorMessage(string variable, double minVal, double maxVal) {
MessageBox.Show(
this,
String.Format(
"The {0} value shoud be larger or equals {1} and less or equals {2}.",
variable,
minVal,
maxVal
),
variable
);
}
private void OnLatitudeValidating(object sender, CancelEventArgs e) {
if(!Double.TryParse(teLatitude.Text, out lat) ||
(lat > maxLat) || (lat < minLat)) {
e.Cancel = true;
ShowErrorMessage("Latitude", minLat, maxLat);
}
}
private void OnLongitudeValidating(object sender, CancelEventArgs e) {
if(!Double.TryParse(teLongitude.Text, out lon) ||
(lon > maxLon) || (lon < minLon)) {
e.Cancel = true;
ShowErrorMessage("Longitude", minLon, maxLon);
}
}
private void OnCalculateRoutesClick(object sender, EventArgs e) {
RouteWaypoint targetPoint = new RouteWaypoint("Searched location", new GeoPoint(lat, lon));
routeProvider.CalculateRoutesFromMajorRoads(targetPoint);
}
#region #RouteCalculated
private void OnRouteCalculated(object sender, BingRouteCalculatedEventArgs e) {
RouteCalculationResult result = e.CalculationResult;
if((result.RouteResults == null) ||
(result.ResultCode == RequestResultCode.BadRequest)) {
rtbResults.Text = "The Bing Route service does not work for this location.";
return;
}
StringBuilder resultList = new StringBuilder("");
if(result.IntermediatePoints != null) {
resultList.Append(String.Format("_________________________\n"));
for(int i = 0; i < e.CalculationResult.IntermediatePoints.Count; i++)
resultList.Append(
String.Format("Starting point {0}: {1} ({2})\n",
i + 1,
e.CalculationResult.IntermediatePoints[i].Description,
e.CalculationResult.IntermediatePoints[i].Location)
);
}
if((result.RouteResults != null) & (result.ResultCode == RequestResultCode.Success)) {
for(int rnum = 0; rnum < e.CalculationResult.RouteResults.Count; rnum++) {
resultList.Append(String.Format("_________________________\n"));
resultList.Append(String.Format("Path {0}:\n", rnum + 1));
resultList.Append(String.Format(
"Distance: {0}\n",
e.CalculationResult.RouteResults[rnum].Distance
));
resultList.Append(String.Format(
"Time: {0}\n",
e.CalculationResult.RouteResults[0].Time
));
if(e.CalculationResult.RouteResults[rnum].Legs != null) {
int legNum = 1;
foreach(BingRouteLeg leg in e.CalculationResult.RouteResults[rnum].Legs) {
resultList.Append(String.Format("\tLeg {0}:\n", legNum++));
resultList.Append(String.Format("\tDistance: {0}\n", leg.Distance));
resultList.Append(String.Format("\tTime: {0}\n", leg.Time));
if(leg.Itinerary != null) {
foreach(BingItineraryItem itineraryItem in leg.Itinerary) {
resultList.Append(String.Format(itineraryItem.Maneuver + "\n"));
resultList.Append(String.Format(
"\t\tLocation: {0}\n",
itineraryItem.Location
));
}
}
}
}
}
}
rtbResults.Text = resultList.ToString();
}
#endregion #RouteCalculated
}
}
See Also