topic Re: Existing field name cannot be modified in ArcGIS Pro SDK Questions

Existing field name cannot be modified

anbinh — Tue, 21 Jan 2025 00:12:56 GMT

Hi Community,

"ProConcepts DDL" documentation suggests that "Field properties such as name, alias name, length, and type of some existing fields in tables or feature classes can be modified using SchemaBuilder.Modify(TableDescription, String, FieldDescription) method."

However, it does not seem to be the case. When I try to modify the existing field name using SchemaBuilder, I would get the error (Visual Studio .NET) saying "'Description.Name' cannot be assigned -it is read only.". The Pro SDK documentation -> Name Property (FieldDescription) also suggests that the name property is read-only.

With the same dataset, however, I can change the field name in ArcGIS Pro directly. Just wondering if it should be considered as a defect that Pro SDK team should investigate? Or if there is a better way of changing the field name using SDK?

Regards,

Re: Existing field name cannot be modified

GKmieliauskas — Tue, 21 Jan 2025 06:39:48 GMT

Hi,

You can use Alter Field geoprocessing tool:

Alter Field (Data Management)—ArcGIS Pro | Documentation

How to call geoprocessing tool here:

ExecuteToolAsync(String,IEnumerable<String>,IEnumerable<KeyValuePair<String,String>>,CancelableProgressor,GPExecuteToolFlags) Method—ArcGIS Pro

Re: Existing field name cannot be modified

Aashis — Tue, 21 Jan 2025 17:09:25 GMT

@anbinh, Please refer to the Modify(TableDescription, String, FieldDescription) method for an existing field modification. The API reference also has an example to modify a field.

Re: Existing field name cannot be modified

anbinh — Tue, 21 Jan 2025 22:21:44 GMT

Hi,

I have read the reference. It says in the documentation that field name is read only. However, there is discrepancy in the Github ProConcepts page (ProConcepts DDL · Esri/arcgis-pro-sdk Wiki) as it suggests that field name can be changed, which I am almost certain that Github Proconcepts page needs to be corrected.

Thanks,

Re: Existing field name cannot be modified

anbinh — Tue, 21 Jan 2025 22:25:06 GMT

Hi,

Thanks for the suggestion.

However, the tool I am working on is a CoreHost application, hence I cannot directly call the geoprocessing tool in the code.

I have done a work-around solution where I create new fields with the name I want, then use updateCursor to copy the existing fields value to the new fields.

If not due to CoreHost application, I would perhaps also use the method as you suggested.

Thanks,