How do I replace text values (In block editor) by using a list picker?

So I'm making a computer reservation system and I want it so that each room has their own individual unit showing how many computers available. I need to do this all with the listpicker but I am seriously confused (See tagged image).

You'd definitely be better off with AI2.

What problems are you having with the AI2 emulator?

First thing I'd do is reinstall AI2.  I'll put instructions below.  Also, I've attached some troubleshooting tips below that.   DON'T SKIP ANYSTEPS IN THE INSTALLATION:

Please reinstall the setup software:

I suggest you try to reinstall the software and see if it still happens, and then, PLEASE report back here and let us know if it fixed your problem.  Please follow these steps.

1. Close down everything on your computer and REBOOT.
2. After the reboot, uninstall the software from the icon in the App Inventor folder... it'll be uninstall.exe.
3. REBOOT AGAIN.  To be SURE, go to your  Program Files folder and make sure the folder for AppInventor is gone.  If not, please delete it before running the setup software.
4. Go to the setup link (setup software), and reinstall the App Inventor software.  DO NOT CHANGE THE DEFAULTS THAT ARE PROVIDED BY THE SETUP SOFTWARE SUCH AS FOLDER ETC.  Don't run an older setup file version that you might have saved to the downloads folder, but use the current one from the link above.
5. After the setup is finished...REBOOT AGAIN
6. Then, try going to the App Inventor site and try loading the emulator again.

That should fix your issue, but make SURE you come back here and reply back so we know it worked, or didn't work.

Emulator Issues:

Most of the emulator connection problems we have seen are a result of not having the most current version of the App Inventor setup software, or that software having been incompletely installed.

Still, there can be many other issues that could cause the connection to the emulator to fail.  Please read and follow the document below on connection issues:

Click here for Emulator Setup and Trouble Shooting Instructions

If you still cannot get the emulator running after following that document, please post in the forum and we'll try to help you out.

Also, read my tips below:

For our App Inventor Tips, visit TwoDogApps.com

You will probably need a Fusion Table with one row per computer,

with columns for:

• Building
• room
• seat
• computer number
• computer type
• current assigned user (blank if free)

Also consider adding a reservations table:

• computer type desired
• reservation requested timestamp
• user to notify when free
• building desired
• SMS to notify

The Pizza Party tutorial will get you started on Fusion tables.

Search this forum for more examples.