topic Re: How do I select a list on a map? in ArcGIS Pro SDK Questions

How do I select a list on a map?

DavidMrázek — Mon, 07 Mar 2022 08:58:39 GMT

Good day,
in my application I would like to search for some elements in the map, and then add them to the list. After going through all the elements, I would mark all the elements from the list on the map. but I don't know how to choose elements from the list.

Here is a code sample:

private async Task DeletePolygonInPolygon(CancelableProgressorSource cps, uint steps, FeatureLayer polygonLayer, QueryFilter queryFilter) { await QueuedTask.Run(async () => { var polyCursor = polygonLayer.Search(queryFilter); cps.Progressor.Max = (uint)steps; cps.Progressor.Message = "Probíhá "; List<Row> features = new List<Row>(); while (polyCursor.MoveNext() && !cps.Progressor.CancellationToken.IsCancellationRequested) { cps.Progressor.Value += 1; cps.Progressor.Status = cps.Progressor.Value + @" z " + cps.Progressor.Max + @" hotovo."; var lineFeature = polyCursor.Current as Feature; var polygonGeometry = lineFeature.GetShape() as Polygon; long oid = polyCursor.Current.GetObjectID(); var spatialQuery = new SpatialQueryFilter() { FilterGeometry = polygonGeometry, SpatialRelationship = SpatialRelationship.Within }; spatialQuery.WhereClause = "OBJECTID <> " + oid; var rowCursor = polygonLayer.Search(spatialQuery); while (rowCursor.MoveNext()) { features.Add(rowCursor.Current); } } mv.Map.SetSelection(features);//here I dont know,how to write it object[] listOfPara = { polygonLayer }; await StartATask("management.DeleteFeatures", listOfPara); }, cps.Progressor); }

Thank you

David

Re: How do I select a list on a map?

GKmieliauskas — Mon, 07 Mar 2022 15:41:53 GMT

Hi,

You can select direct from layer:

await QueuedTask.Run(async () => { polygonLayer.Select(queryFilter, SelectionCombinationMethod.New); object[] listOfPara = { polygonLayer }; await StartATask("management.DeleteFeatures", listOfPara); }, cps.Progressor);

Re: How do I select a list on a map?

DavidMrázek — Tue, 08 Mar 2022 07:31:44 GMT

Thanks for the advice, but this code definitely won't display the list.

Re: How do I select a list on a map?

GKmieliauskas — Tue, 08 Mar 2022 07:54:42 GMT

Sorry. I think you will understand that you can select layer by query directly. Full code for your realization could be like this:

private async Task DeletePolygonInPolygon(CancelableProgressorSource cps, uint steps, FeatureLayer polygonLayer, QueryFilter queryFilter) { await QueuedTask.Run(async () => { polygonLayer.ClearSelection(); var polyCursor = polygonLayer.Search(queryFilter); cps.Progressor.Max = (uint)steps; cps.Progressor.Message = "Probíhá "; List<Row> features = new List<Row>(); while (polyCursor.MoveNext() && !cps.Progressor.CancellationToken.IsCancellationRequested) { cps.Progressor.Value += 1; cps.Progressor.Status = cps.Progressor.Value + @" z " + cps.Progressor.Max + @" hotovo."; var lineFeature = polyCursor.Current as Feature; var polygonGeometry = lineFeature.GetShape() as Polygon; long oid = polyCursor.Current.GetObjectID(); var spatialQuery = new SpatialQueryFilter() { FilterGeometry = polygonGeometry, SpatialRelationship = SpatialRelationship.Within }; spatialQuery.WhereClause = "OBJECTID <> " + oid; polygonLayer.Select(spatialQuery, SelectionCombinationMethod.Add); } object[] listOfPara = { polygonLayer }; await StartATask("management.DeleteFeatures", listOfPara); }, cps.Progressor); }

Re: How do I select a list on a map?

DavidMrázek — Tue, 08 Mar 2022 08:17:46 GMT

I understood what you meant, but it's still not. But thank you.

Re: How do I select a list on a map?

DavidMrázek — Tue, 08 Mar 2022 08:31:18 GMT

I'm sorry, you were right, it's correct and functional, I didn't notice that I was already rewriting things in the code ... Thank you!