Posted 7 January 2018, 4:31 pm EST
For three comboboxes on an ASP.Net sheet, I have set the first value to 0 with the text of “* Please make a selection …” There is no default value in the database intentionally but there is a constraint that says > 0, so I know the database won’t be updated. It’s just that I don’t know the best way of letting the user know what happened.
I need to make sure the three values are greater than 0 when a user hits the Update command button.
I’m not sure what the code should look like for checking whether or not a user has actually changed a drop-down value before updating the database and that it meets certain criteria. They have to choose something from the drop-down list. I don’t know how to validate that.
Any guidance would be appreciated.
