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Power APPS filter Galery compare combo box items with collection table

 Hi Everyone,

I'm struggling Now for 2 days with something i thought would be not this complicated


I have a collection collected from Sharepoint at app OnStart, in wich i have a data table like this.








I have Build a Combobox populate with ALL Distinct Values in all my program table of my collection.

I want to build a gallery where i can filter my collection.


My issues is that i can't achieve a Filter from table element to table element, like if length of Join >0


What i have done so far

On select in my combo box, i create a selected item collection

















On my Gallery ( and here comes the trouble) in cannot create the expression that fits





            IsBlank(ComboBox1_1.SelectedItems.Result) || 
            IsEmpty(ComboBox1_1.SelectedItems.Result) || 
            Programs.Value in SelectedProgram







But it doesn't work. I want to cross compare my 2 data table "SelectedProgram" with my collectionSP.Program data table , and returning in my Gallery all element where there is even a single match between my 2 tables


i also try a ForAll in my SelectProgram collection.


I also try to create a new colum in my collection where i flatten in a single string the whole program collection but didn't find a way to filter properly.


Thanks for the Help.


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