topic Re: Reading field values and editing field values in ArcGIS Pro SDK Questions

Reading field values and editing field values

BensonColeC — Thu, 17 Jun 2021 20:41:27 GMT

I'm trying to read the data from one field and use it to perform calculations in order to find the data for another field. I know how to change the data of a field using the inspector tool, but how would I make that data based off of the calculations of another field.

For example, if I wanted to have Field3 = (Field1+ Field2) / 2.

Re: Reading field values and editing field values

RichRuh — Fri, 18 Jun 2021 00:14:15 GMT

Hello,

You might want to take a look at attribute rules. While not part of the Pro SDK, attribute rules run Arcade scripts when edits take place. You can assign a calculation rule to Field3 that computes the value of (Field1 + Field2)/2 just as you have written above.

I hope this helps,

--Rich

Re: Reading field values and editing field values

BensonColeC — Fri, 18 Jun 2021 14:54:25 GMT

I don't think that will work because I need to do it as part of an add-in that uses lots if if-else statements. The add-in will take input data and then read certain fields and calculate another field based on the field it reads and the input data.

Re: Reading field values and editing field values

RichRuh — Fri, 18 Jun 2021 18:14:51 GMT

OK, you'd have to do it manually then. Read the values of Field1 and Field2, do the calculation and then write out the result to Field3.

Re: Reading field values and editing field values

BensonColeC — Mon, 21 Jun 2021 22:02:48 GMT

What would be the best way to do this for thousands of rows. I tried using a table search and using while(rowCursor.MoveNext()) and I read and updated within the while loop, but this took about 15 minutes to run. How could I do this faster?

Re: Reading field values and editing field values

RichRuh — Mon, 21 Jun 2021 23:29:01 GMT

The Calculate Fields geoprocessing tool is the fastest way to mass update data. We are planning on adding faster update cursors to the C# SDK in a future release of Pro.

Re: Reading field values and editing field values

BensonColeC — Tue, 22 Jun 2021 20:22:34 GMT

Is there a way to use the Calculate Field geoprocessing tool through my C# script? I've tried to look for a way but don't see anything about it.

Re: Reading field values and editing field values

RichRuh — Tue, 22 Jun 2021 23:59:32 GMT

There's a conceptual doc explaining how to call geoprocessing tools from Pro.

I hope this helps.