Global Variable Not Working Between Cards?

[lucassinner]

Hi all,
I’m new to LiveCode and trying to pass a value from one card to another using a global variable, but it’s not working as expected.
On Card “Home,” I set the global like this:

Code: Select all

global gUserText
put field "InputField" into gUserText
go to card "Details"

Then on Card “Details”:

Code: Select all

global gUserText
put gUserText into field "DisplayField"

But the field on the second card stays blank. No errors, just nothing shows up. Do I need to declare the global differently? Or is `openCard` timing an issue?
Thanks for any help!
Lucas

[Klaus]

Hi Lucas,

welcome to the forum!

Could you please post the complete script(s) where you put the text into the global?
Your example here SHOULD work as advertized!

Best

Klaus

[stam]

Agreed - the code should work.
You may want to tick 'show globals' in the script editor to see what value your global is holding.

[dunbarx]

Hi.

What Stam may have meant was to make sure the global was not empty. The scripts themselves are indeed perfectly sound.

You can test this with:

Code: Select all

global gUserText
put field "InputField" into gUserText
answer gUserText

Make sure there is something in that variable.

Craig

[SparkOut]

Also check that you don't have a duplicated field on the details card that's obscuring the destination field. It *might* be that your code is fine, but you're not seeing the content because of something in the way.

[stam]

You can test this with: <snip>

you don't need code to see if the global is empty or holding unexpected value - global show directly in the script editor, you just need to tick the “show globals” tickbox.

If the global is a string (and not, say, an array) the code posted will work - but simpler still, you could run this in the messageBox at any time to show what value gUserText contains:

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global gUserText ; put gUserText

[dunbarx]

All good stuff.

@ lucassinner. What is the latest news?