internal async Task PerformAnalysis(MapPoint ptStartLoc, MapView mapView, ProgressorSource ps)
{
ps.Progressor.Message = "Running the analysis...";
ps.Progressor.Status = "Gathering and verifying parameter data";
string sReqUrl = Properties.Settings.Default.QryPointToState;
string sReq = String.Format("{0}?returnGeometry=false&returnDistinctValues=false&geometry={1}&geometryType=esriGeometryPoint&f=json&outFields=*&spatialRel=esriSpatialRelIntersects",
sReqUrl, ptStartLoc.ToJson());
// Find out what state the user clicked; or report an error if outside the U.S.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(sReq);
string sResp;
try {
using (StreamReader sread = new StreamReader(req.GetResponse().GetResponseStream()))
sResp = sread.ReadToEnd();
} catch (Exception e) {
ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Error mapping the chosen spot to a petroleum area district in the U.S.A.: " + e.Message);
return;
}
dynamic respPADDState = JsonConvert.DeserializeObject(sResp);
try {
string sState = respPADDState.features[0].attributes.STATE.ToString();
// Find out what PADD zone the state is in
SelectedPADDZone = PaddStateToZone[sState];
} catch (Exception e) {
System.Diagnostics.Debug.WriteLine("Exception getting PADD for chosen spot: " + e.Message);
ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Please choose a spot within the U.S.A.");
return /*null*/;
}
// Find out the gallons/$1.00 in that PADD zone
double nFuelCost = PADDZoneToFuelCost[SelectedPADDZone];
// Find out the miles per dollar each vehicle: (mi / gal) / (dollars / gal)
// Map is in meters, so convert miles to meters
Vehicle[] orderedVehicles = SelectedVehicles.OrderBy(vehicle => vehicle.Mpg).ToArray <Vehicle>();
IEnumerable <double> vehicleMetersPerDollar =
orderedVehicles.Select(vehicle => (vehicle.MetersPerGallon) / nFuelCost);
string sDistsParam = String.Join(" ", vehicleMetersPerDollar.ToArray());
MapPoint ptStartLocNoZ = await QueuedTask.Run(() => {
MapPoint ptNoZ = MapPointBuilder.CreateMapPoint(ptStartLoc.X, ptStartLoc.Y, ptStartLoc.SpatialReference);
return(ptNoZ);
});
// No corresponding type for the needed GPFeatureRecordSetLayer parameter
string sStartGeom = ptStartLocNoZ.ToJson();
string sStartLocParam = "{\"geometryType\":\"esriGeometryPoint\",\"features\":[{\"geometry\":" + sStartGeom + "}]}";
// Run the query
ps.Progressor.Status = "Executing the analysis";
string sGPUrl = Properties.Settings.Default.GPFindSA;
sGPUrl += String.Format("?Distances={0}&Start_Location={1}&f=json", sDistsParam, sStartLocParam);
HttpWebRequest reqSA = (HttpWebRequest)WebRequest.Create(sGPUrl);
HttpWebResponse wr;
try {
wr = (HttpWebResponse)reqSA.GetResponse();
if (wr.StatusCode != HttpStatusCode.OK)
{
ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Error running analysis: " + wr.StatusDescription);
return;
}
} catch (WebException e) {
ArcGIS.Desktop.Framework.Dialogs.MessageBox.Show("Error running analysis: " + e.Message);
return;
}
// Show the results
ps.Progressor.Status = "Processing the results";
using (StreamReader sread = new StreamReader(wr.GetResponseStream()))
sResp = sread.ReadToEnd();
JObject respAnalysis = JObject.Parse(sResp);
JArray feats = respAnalysis["results"][0]["value"]["features"] as JArray;
// Rectify results and order so that largest polygon can be added to the map first
List <JToken> aryResFeats = RectifyResults(feats, orderedVehicles);
int iSR = respAnalysis["results"][0]["value"]["spatialReference"]["wkid"].ToObject <Int32>();
SpatialReference sr = await QueuedTask.Run <SpatialReference>(() => {
SpatialReference srTemp = SpatialReferenceBuilder.CreateSpatialReference(iSR);
return(srTemp);
});
/*lock (_lockResults)*/
Results.ClearResults();
// Iterate backwards to add larger polygons behind smaller ones
for (int iVeh = orderedVehicles.Count() - 1; iVeh >= 0; iVeh--)
{
Result result = new Result(orderedVehicles[iVeh]);
Polygon poly = null;
IDisposable graphic = null;
// Compute color for this result
float multiplier = aryResFeats.Count > 1 ? ((float)iVeh) / ((float)(aryResFeats.Count - 1)) : 0;
byte red = (byte)(255 - (255 * multiplier));
byte green = (byte)(255 * multiplier);
Color color = Color.FromRgb(red, green, 0);
result.Color = color.ToString();
result.PaddZone = SelectedPADDZone;
result.DollarsPerGallon = nFuelCost;
string sGeom = aryResFeats[iVeh]["geometry"].ToString();
poly = await QueuedTask.Run(() => {
Polygon polyNoSR = PolygonBuilder.FromJson(sGeom);
return(PolygonBuilder.CreatePolygon(polyNoSR, sr));
});
CIMStroke outline = SymbolFactory.ConstructStroke(ColorFactory.BlackRGB, 1.0, SimpleLineStyle.Solid);
CIMPolygonSymbol symPoly = SymbolFactory.ConstructPolygonSymbol(
ColorFactory.CreateRGBColor(color.R, color.G, color.B, RESULT_OPACITY_PCT),
SimpleFillStyle.Solid, outline);
CIMSymbolReference sym = symPoly.MakeSymbolReference();
CIMSymbolReference symDef = SymbolFactory.DefaultPolygonSymbol.MakeSymbolReference();
graphic = await QueuedTask.Run(() => {
return(mapView.AddOverlay(poly, sym));
});
result.DriveServiceArea = poly;
result.DriveServiceAreaGraphic = graphic;
result.DriveDistM = aryResFeats[iVeh]["attributes"]["ToBreak"].Value <double>();
/*lock (_lockResults)*/
Results.Add(result);
}
}
