topic Re: The problem with LocatorTask is retrieving all objects within a category in .NET Maps SDK Questions

The problem with LocatorTask is retrieving all objects within a category

AndreyTsar — Sat, 23 Nov 2024 14:36:00 GMT

Hello! I want to retrieve all objects related to a category, but the search result returns 0 objects.

My code:

var locatorTask = new LocatorTask(new Uri("https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer"));
GeocodeParameters param = new GeocodeParameters();
param.MaxResults = 100;
if (map.VisibleArea != null)
param.SearchArea = map.VisibleArea;
else return;
param.MinScore = 1;
param.ResultAttributeNames.Add("*");
param.Categories.Add("POI");
param.Categories.Add("13035");
param.Categories.Add("Coffee");

var res = await locatorTask.GeocodeAsync("", param);
foreach (var item in res)
{
TXTstat.Text = $"{TXTstat.Text}{item.Attributes["PlaceName"]}\n";
}

Re: The problem with LocatorTask is retrieving all objects within a category

ViktorSafar — Mon, 25 Nov 2024 06:41:35 GMT

Well, the 1st param for GeocodeAsync() is an address and you're not supplying any. https://developers.arcgis.com/rest/services-reference/enterprise/geocode-service/

Re: The problem with LocatorTask is retrieving all objects within a category

GKmieliauskas — Mon, 25 Nov 2024 15:31:51 GMT

Hi,

I have edited code from the Find Place sample (MAUI). Code below:

GeocodeParameters parameters = new GeocodeParameters(); // Get the current map extent. Geometry extent = MyMapView.VisibleArea; // Update the search parameters. parameters.SearchArea = extent; var locatorTask = new LocatorTask(new Uri("https://geocode-api.arcgis.com/arcgis/rest/services/World/GeocodeServer")); // Get the location information. IReadOnlyList<GeocodeResult> locations = await _geocoder.GeocodeAsync("Coffee", parameters); // Stop gracefully and show a message if the geocoder does not return a result. if (locations.Count < 1) { return; // 3. Stop. }

It works and returns locations. Sample is here:

https://github.com/Esri/arcgis-maps-sdk-dotnet-samples/tree/main/src/MAUI/Maui.Samples/Samples/Search/FindPlace