topic Re: SchemaBuilder Error in ArcGIS Pro SDK Questions

SchemaBuilder Error

tzz_12 — Wed, 05 Jul 2023 22:59:48 GMT

Hi Everyone,

I am trying to use a feature layer description to create an identical new feature class with different fields. I know there are several ways to do this. I tried doing it on DLL. The feature class and fields I want is created correctly, but when I import it into the map, the feature layer does not show, because the shape area, length and polygon fields were not transferred to the new feature class. How can I fix this?

QueuedTask.Run(() => { var LayerDef = Layer.GetFeatureClass().GetDefinition(); using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(gdb)))) { // Creating the attribute fields FieldDescription objectIDFieldDescription = FieldDescription.CreateObjectIDField(); FieldDescription field1 = new FieldDescription("field1", FieldType.Double); FieldDescription field2 = new FieldDescription("field2", FieldType.Double); List<FieldDescription> fieldDescriptions = new List<FieldDescription>() {objectIDFieldDescription, field1, field2 }; ShapeDescription shapeDescription = new ShapeDescription(IntersectSort.GetFeatureClass().GetDefinition()); FeatureClassDescription LayerDescription = new FeatureClassDescription("Layer_Name", fieldDescriptions, shapeDescription); SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase); schemaBuilder.Create(LayerDescription); bool success = schemaBuilder.Build(); });

Re: SchemaBuilder Error

Wolf — Wed, 05 Jul 2023 23:41:51 GMT

i haven't tried this but i think these lines have an issue:

ShapeDescription shapeDescription = new ShapeDescription(IntersectSort.GetFeatureClass().GetDefinition());FeatureClassDescription LayerDescription = new FeatureClassDescription("Layer_Name", fieldDescriptions, shapeDescription);

maybe try this instead:

FeatureClassDefinition originalFeatureClassDefinition = IntersectSort.GetFeatureClass().GetDefinition(); FeatureClassDescription originalFeatureClassDescription = new FeatureClassDescription(originalFeatureClassDefinition); FeatureClassDescription LayerDescription = new FeatureClassDescription("Layer_Name", fieldDescriptions, originalFeatureClassDescription.ShapeDescription);

Re: SchemaBuilder Error

tzz_12 — Thu, 06 Jul 2023 00:19:39 GMT

Thanks Wolf for your help. I tried your method, and it has the same result. For some reason, the feature layer is not showing on the map.

Re: SchemaBuilder Error

Wolf — Thu, 06 Jul 2023 15:42:42 GMT

It is working for me. The following snippet will create a new FeatureClass class "NewLayer" from an existing "TestPolygons" feature layer using the same shape definition but with two new fields. Then it adds the new FeatureClass to the map as "New: NewLayer" and finally copies all existing features from "TestPolygons" to "New: NewLayer".

protected override async void OnClick() { var originalLayerName = "TestPolygons"; var newLayerName = "NewLayer"; var originalLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().Where(fl => fl.Name.Contains(originalLayerName)).FirstOrDefault(); var isOk = await QueuedTask.Run<bool>(() => { var LayerDef = originalLayer.GetFeatureClass().GetDefinition(); using Geodatabase geodatabase = new(new FileGeodatabaseConnectionPath(new Uri(Project.Current.DefaultGeodatabasePath))); // Creating the attribute fields FieldDescription objectIDFieldDescription = FieldDescription.CreateObjectIDField(); FieldDescription field1 = new("field1", FieldType.Double); FieldDescription field2 = new("field2", FieldType.Double); List<FieldDescription> fieldDescriptions = new() { objectIDFieldDescription, field1, field2 }; FeatureClassDefinition originalFeatureClassDefinition = originalLayer.GetFeatureClass().GetDefinition(); FeatureClassDescription originalFeatureClassDescription = new(originalFeatureClassDefinition); FeatureClassDescription LayerDescription = new(newLayerName, fieldDescriptions, originalFeatureClassDescription.ShapeDescription); SchemaBuilder schemaBuilder = new(geodatabase); schemaBuilder.Create(LayerDescription); bool success = schemaBuilder.Build(); return success; }); if (!isOk) { MessageBox.Show($@"Failed to create {newLayerName}"); return; } // add the new FeatureClass to the map var newLyr = await QueuedTask.Run(() => { using Geodatabase geodatabase = new(new FileGeodatabaseConnectionPath(new Uri(Project.Current.DefaultGeodatabasePath))); var newFc = geodatabase.OpenDataset<FeatureClass>(newLayerName); return LayerFactory.Instance.CreateLayer<FeatureLayer>(new FeatureLayerCreationParams(newFc) { Name = $@"New: {newLayerName}" }, MapView.Active.Map); }); // copy some data await QueuedTask.Run(() => { // create an edit operation EditOperation copyOperation = new EditOperation() { Name = "Copy Data", ProgressMessage = "Working...", CancelMessage = "Operation canceled.", ErrorMessage = "Error copying polygons", SelectModifiedFeatures = false, SelectNewFeatures = false }; using var rowCursor = originalLayer.Search(); while (rowCursor.MoveNext()) { using (var row = rowCursor.Current as Feature) { var geom = row.GetShape().Clone(); if (geom == null) continue; var newAttributes = new Dictionary<string, object>(); newAttributes.Add("field1", 1.0); newAttributes.Add("field2", 2.0); copyOperation.Create(newLyr, geom, newAttributes); } } // execute the operation if (!copyOperation.Execute()) { MessageBox.Show($@"Copy operation failed {copyOperation.ErrorMessage}"); return; } }); }

Re: SchemaBuilder Error

tzz_12 — Fri, 07 Jul 2023 15:22:02 GMT

It works after some minor modification to the code, but when I kept the newAttributes in "copyOperation.Create(newLyr, geom, newAttributes)," it would show this error message, "Cannot convert from System.Collection.Generic.Dictionary<string,object> to System.Action<long>". It works fine if I delete the newAttributes from the line tho. On a related note, how do I save the edits operations within the script to avoid doing it manually after the script runs? Thanks for your help Wolf!

Re: SchemaBuilder Error

Wolf — Sun, 23 Jul 2023 15:25:08 GMT

My sample code above is for release 3.0 and newer, if you are using ArcGIS Pro 2.x then the API is bit different. Below is the snippet that works with 2.9, note the change in the copyOperation.Create line required by the 2.x API (the parameters are different):

protected override async void OnClick() { var originalLayerName = "TestPolygons"; var newLayerName = "NewLayer"; var originalLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().Where(fl => fl.Name.Contains(originalLayerName)).FirstOrDefault(); var isOk = await QueuedTask.Run<bool>(() => { var LayerDef = originalLayer.GetFeatureClass().GetDefinition(); bool success = false; using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(Project.Current.DefaultGeodatabasePath)))) { // Creating the attribute fields ArcGIS.Core.Data.DDL.FieldDescription objectIDFieldDescription = ArcGIS.Core.Data.DDL.FieldDescription.CreateObjectIDField(); ArcGIS.Core.Data.DDL.FieldDescription field1 = new ArcGIS.Core.Data.DDL.FieldDescription("field1", FieldType.Double); ArcGIS.Core.Data.DDL.FieldDescription field2 = new ArcGIS.Core.Data.DDL.FieldDescription("field2", FieldType.Double); List<ArcGIS.Core.Data.DDL.FieldDescription> fieldDescriptions = new List<ArcGIS.Core.Data.DDL.FieldDescription>() { objectIDFieldDescription, field1, field2 }; FeatureClassDefinition originalFeatureClassDefinition = originalLayer.GetFeatureClass().GetDefinition(); FeatureClassDescription originalFeatureClassDescription = new FeatureClassDescription(originalFeatureClassDefinition); FeatureClassDescription LayerDescription = new FeatureClassDescription(newLayerName, fieldDescriptions, originalFeatureClassDescription.ShapeDescription); SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase); schemaBuilder.Create(LayerDescription); success = schemaBuilder.Build(); } return success; }); if (!isOk) { MessageBox.Show($@"Failed to create {newLayerName}"); return; } // add the new FeatureClass to the map var newLyr = await QueuedTask.Run(() => { using (Geodatabase geodatabase = new Geodatabase(new FileGeodatabaseConnectionPath(new Uri(Project.Current.DefaultGeodatabasePath)))) { var newFc = geodatabase.OpenDataset<FeatureClass>(newLayerName); return LayerFactory.Instance.CreateLayer<FeatureLayer>(new FeatureLayerCreationParams(newFc) { Name = $@"New: {newLayerName}" }, MapView.Active.Map); } }); // copy some data await QueuedTask.Run(() => { // create an edit operation EditOperation copyOperation = new EditOperation() { Name = "Copy Data", ProgressMessage = "Working...", CancelMessage = "Operation canceled.", ErrorMessage = "Error copying polygons", SelectModifiedFeatures = false, SelectNewFeatures = false }; using (var rowCursor = originalLayer.Search()) { while (rowCursor.MoveNext()) { using (var row = rowCursor.Current as Feature) { var geom = row.GetShape().Clone(); if (geom == null) continue; var newAttributes = new Dictionary<string, object> { { newLyr.GetFeatureClass().GetDefinition().GetShapeField(), geom }, { "field1", 1.0 }, { "field2", 2.0 } }; copyOperation.Create(newLyr, newAttributes); } } } // execute the operation if (!copyOperation.Execute()) { MessageBox.Show($@"Copy operation failed {copyOperation.ErrorMessage}"); return; } }); }

In order to save all edits you can use:

_ = Project.Current.SaveEditsAsync();