How to validate data and show error before running workflow?

[Enitoxy]

Hello there,

I have a custom workflow, and I want to check if the data that the user has entered in a record is correct. I want to do that check before the custom workflow is run.

Is there a way to show an error message to the user if some of the data is not correct? I don't know if it's possible inside the custom workflow, or with some sort of event handler except for editViewPreSave. Ideally I want it to be inside the custom workflow, and I can send an error if something goes wrong.

Thank you very much!

[rskrzypczak]

You can't do this through workflow.
Workflow starts after the record is saved, so it's too late.
As you mentioned, the only solution is to add a handler and only editViewPreSave is able to display feedback to the user.

[Enitoxy]

Ah I see, thank you very much!