topic Re: How to set spatial reference to a schematic diagram class with Arcobjects? in ArcObjects SDK Questions

How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Tue, 27 Jan 2015 10:35:58 GMT

I used ArcObjects for .NET to create a schematic dataset, then a schematic diagram class (aka "schematic template" in the UI) wherein I load feature classes.

To do that, I followed the sample: "Create A Standard Builder Schematic Diagram Class From Scratch".

But when I generate diagrams, I get from ArcMap a "missing spatial reference" warning.

So how to set the spatial reference?

In ArcMap, it's possible in the properties of the schematic template. But using ArcObjects, I can't find an interface of the class SchematicDiagramClass to set the ISpatialReference.

I would appreciate any help on that.

Thanks!

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

nicogis — Tue, 27 Jan 2015 10:39:35 GMT

SchematicDiagramClass implements IGeoDataset ArcObjects Help for .NET developers that has SpatialReference ArcObjects Help for .NET developers

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Tue, 27 Jan 2015 10:42:04 GMT

Yes, but the spatial reference property of IGeoDataset is read-only: http://resources.arcgis.com/en/help/arcobjects-net/componenthelp/index.html#//0025000003n0000000

There is only a "get" to the spatial reference object.

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

nicogis — Tue, 27 Jan 2015 10:58:26 GMT

see IGeoDatasetSchemaEdit ArcObjects Help for .NET developers

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Tue, 27 Jan 2015 13:54:25 GMT

It works casting the ISchematicDiagramClass object to this IGeoDatasetSchemaEdit, then using AlterSpatialReference, thanks.

Now I still have a 'missing spatial reference' error adding a diagram to a map, because the schematic element classes still don't have spatial reference. I create these object as ISchematicElementClass. What interface could I use to set their spatial reference?

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

nicogis — Tue, 27 Jan 2015 14:28:23 GMT

You can get SchematicDataset and then alter spatial reference

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Tue, 27 Jan 2015 14:37:09 GMT

OK, I got the ISchematicDataset object and am looking for an interface like IGeoDatasetSchemaEdit to change the spatial reference. The available interfaces are in this list: ArcObjects 10 .NET SDK Help‌

IGeoDatasetSchemaEdit isn't available for this object because I get a cast error.

Which interface could I use ?

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

nicogis — Tue, 27 Jan 2015 15:38:15 GMT

Can you post part of source code ?

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Sat, 11 Dec 2021 23:17:50 GMT

I can't cast the SchematicDataset to IGeoDatasetSchemaEdit because I get an InvalidCastException. Here is my code:

I create a schematicWorkspace from a IWorkspace like this:

[...]

ISchematicWorkspaceFactory schematicWorkspaceFactory = new SchematicWorkspaceFactoryClass();
ISchematicWorkspace schematicWorkspace = schematicWorkspaceFactory.Open(workspace);

Then, I create the schematic dataset:

schematicDataset = schematicWorkspace.CreateSchematicDataset(SCHEMATIC_DATASET_NAME);
schematicDataset.DesignMode = true;
Type objectType = Type.GetTypeFromProgID("esriSchematic.SchematicStandardBuilder");
ISchematicStandardBuilder schematicStandardBuilder = Activator.CreateInstance(objectType) as ISchematicStandardBuilder;
schematicStandardBuilder.AddConnectedNodes = true;
schematicStandardBuilder.InitializeLinksVertices = true;
schematicStandardBuilder.AutoCreateElementClasses = true;

schematicDiagramClass = schematicDataset.CreateSchematicDiagramClass(SCHEMATIC_DIAGRAM_CLASS_NAME);
schematicDiagramClass.SchematicBuilder = schematicStandardBuilder as ISchematicBuilder;
schematicDiagramClass.SchematicDataSource = schematicDataset.DefaultSchematicDataSource;
schematicDiagramClass.ExternalQueryEvaluationMode = esriSchematicExternalQueryEvaluationMode.esriSchematicNoQuery;
schematicDiagramClass.AlwaysLoadDiagrams = true;

Then, I define the spatial reference:

ISpatialReference spatialReference = gdbDataset.getSpatialReference();
IGeoDatasetSchemaEdit geoDataset = (IGeoDatasetSchemaEdit)schematicDataset; // here I get an InvalidCastException
geoDataset.AlterSpatialReference(spatialReference);
IGeoDatasetSchemaEdit geoDiagramClass = (IGeoDatasetSchemaEdit)schematicDiagramClass;
geoDiagramClass.AlterSpatialReference(spatialReference);

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

nicogis — Tue, 27 Jan 2015 18:42:31 GMT

Excuse me but before I have seen old help because now schematic has changed ( ArcObjects Help for .NET developers ). See these snippets: http://www.arcgis.com/home/item.html?id=a8be26357b944dfdbbd69a55818dcc88

Re: How to set spatial reference to a schematic diagram class with Arcobjects?

KevinLECOCQ — Wed, 28 Jan 2015 10:50:07 GMT

OK, I finally found a solution in the sample called "Create A Schematic Diagram Class Entirely Based On Custom Queries From Scratch". I needed to create a shape field object (IField) to set the spatial reference of my ISchematicElementClass objects.

Now I get the schematic diagram spatial referenced. Problem solved, thanks a lot for the help!