Set value to true if text in InputTextBox found within Gallery Items?

[JamesM]

I've tried the below, but false never changes to true 😞 

What I really want to do is disable the 'Save' button if the user has typed in a group name that exists already in the gallery. 

[samuelJ]

Hi,

You should try to code something like the below, that will check if a record exists:

if (Count(LookUp(TablePopulatingGallery, TablePopulatingGallery.SomeField = TextInputGroupName.Text)) > 0, //true Code, //false Code)

You should check the table/collection populating the gallery.  Also i don't see anywhere where the variable is set to false, only true.  Is there a reason you do not set the varaible to false? Is it set to false somewhere else? 

[v-sheyu-msft · Accepted solution]

hi @JamesM,

Do you want to make the ‘save’ button invisible when a value user typed in textInput control has been existed in the gallery ？

Could you please share a bit more about the “TitleGroupName” within your formula? Is it a Label control in your Gallery?

Based on the formula you provided, I think there may have something wrong with your formula.

I made a test on my side.  It worked.

Set the visible property of ‘save’ button to: isfound

Set the onchange property of textinput1 to :

If(TextInput1.Text in Gallery1.AllItems.Title,UpdateContext({isfound:false}),UpdateContext({isfound:true}))

regards,

eason