topic Re: Expression building in a Custom Task in SAS Enterprise Guide

Expression building in a Custom Task

HJD24 — Wed, 22 Jan 2014 10:47:35 GMT

Hi all,

I'm trying (and failing) to leverage the expression builder functionality within EG 5.1 in a Custom Task but am having trouble implementing the "AddTable" method. It appears to take 2 arguments - ICanBeInputData id & bool columnonly.

Does anyone out there have any experiences of utilising the expression builder within a custom task that they could share?

Thanks,

Hywel

Re: Expression building in a Custom Task

ChrisHemedinger — Wed, 22 Jan 2014 14:06:22 GMT

Hywel,

The expression builder is not a documented, reusable component for custom tasks. The APIs that it uses are internal to SAS Enterprise Guide, and are subject to change with each release.

If you're interested in a component that can help with filter expressions, you can use the DataSelector control. That's part of the SAS.Tasks.Toolkit library that is documented for custom task use. You can find an example in my book about developing custom tasks (see Chapter 11). You can also see an example in this GitHub project.

Chris

Re: Expression building in a Custom Task

HJD24 — Wed, 22 Jan 2014 14:32:32 GMT

Thanks Chris, I suspected you would be the person to point me in the right direction. I'll work through your example and hopefully it will provide me with what I require.

Thanks again,

Hywel