Hi,

I have a registration form. I have added custom workflow to the form. Custom workflow checks if user input is valid. If not valid, I would like to display a validation message e.g "Invalid input. Contact admin".

Here is sample code:

try
{
    if(ExistsInDatabase)
    {
        //do something
    }
    else
    {
        //show validation message "Input does not exist in DB

    }
}
catch (Exception)
{
    return WorkflowExecutionStatus.Failed;
}
return WorkflowExecutionStatus.Completed;

How do I achieve this? Thanks.

NB: I don't think I can implement validation on the form itself in the backoffice because the validation involves checking the DB using EF Core.