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Hello, how can I create a double drop down button. I have a form and I want users to select county but they have to select state first. So they select state, then that selection shows them list of counties in that state, then they select 1. Entry will go to appery db and is part of a larger form.
In my db, I have a collection of with variables state, county
What's a double drop down? Are you referring to something like this: http://docs.appery.io/tutorials/build... ?
yes, thanks.
This was not very helpful. I have 'state' & 'county' data stored in collection A. In my UI form, I want to click on drop-down, select state, then have counties show up. Select county and have that populate NEW collection B. Is that possible?
Hello! Yes, it's possible - on change value event of first select invoke service to retrieve counties for selected in first select state. Service response map to the second select.
Can you give me a little more detail? On drop down list, change value doesn't give me the option to 'invoke service'
Take a look at the screenshot 
so first invoke list service to find states, then second invoke list service to find counties? Can you point me to a tutorial on this. Your instructions are cryptic!
Please point me to the tutorial on this. Your responses are cryptic and very frustrating...
Hi - yes you're right, on event of the first mobile select (state) -- 'value change' - invoke the service 'countries'. Make mapping of the results to the appropriate select fields.